FINAL suepr merge step : added all modules to this super repos

sites/all/modules/contrib/fields/unique_field/CHANGELOG.txt

@@ -0,0 +1,93 @@
+/**
+ * Revisions log for unique_field
+ */
+
+version 7.x-1.0-rc1 (2011/07/25)
+-- #1163924 by derhasi: fixing support for multilingual fields
+-- #1185904: reworking query code to use EntityFieldQuery
+-- #1185902: adding functional tests for core functionality
+
+version 2011/06/11 (7.x-1.0-beta2)
+-- #1037904 by Boobaa: fixing compatibility with localized content
+
+version 2010/11/20 (7.x-1.0-beta1)
+-- #945482 by Scott Falconer: fixing PDOException on empty values in
+  multi-value fields
+-- #970548: fixing undefined index warning
+-- fixing JavaScript bypass for compatibility with Drupal 7 updates
+-- other code improvements
+
+version 2010/08/04
+-- fixed restriction bypass JavaScript for Drupal 7 compatibility
+
+version 2010/01/20
+-- validation is skipped when a node is deleted (otherwise nodes
+  with duplicate values are prevented from being deleted)
+-- fixed translatability of all strings
+-- added documentation through help hook
+-- fixed compatibility with Drupal 7.0 alpha 1
+
+version 2009/11/17
+-- initial release of Drupal 7.x compatible version
+
+version 2009/11/12
+-- added Italian translation [thanks to eliosh]
+-- improved user message that reports duplicate values when checking
+  fields in combination
+-- fixed support for datetime and other date-related database field
+  datatypes [thanks to Parkes Design]
+-- added permission that allows users to bypass the unique field
+  requirements after getting the warning message [thanks to benjah]
+
+version 2009/03/06
+-- fixed query generation for grouping OR clauses
+-- altered appearance of unique fields settings on the content type form:
+  moved unique field section to the bottom, added descriptions
+-- fixed compatibility with date module version 6.x-2.0
+-- fixed compatibility with content_permissions module [thanks to skassam]
+-- Hungarian translation added [thanks to Zoltan Balogh]
+
+version 2009/02/09
+-- improved handling of CCK values in single node scope
+-- fixed formatting bug in duplicate error message
+
+version 2009/02/07
+-- fixed handling of multiple values per CCK field
+-- added option for showing the nodes that match when a duplicate
+  value is found [thanks to crea]
+-- added node language as a query field and scope
+-- fixed handling of node revisions
+-- rewrote query generation routine
+-- added node author as a query field
+-- added hook_uninstall support for removing the module's variables
+  [thanks to markus_petrux]
+-- improved compliance with coding standards [thanks to deekayen]
+
+version 2008/10/24
+-- updated to compatibility with Drupal 6.x [thanks to Yur]
+-- added check for content.module for CCK-dependent code [thanks to sigsby]
+-- removed all MySQL database-specific code [thanks to rssaddict]
+
+version 2008/03/15
+-- fixed to use node title label from node type data [thanks to tj2653]
+
+version 2008/03/14
+-- changed behavior so that if a field value is null or empty it matches
+  no other node (including other nodes with null or empty values)
+  [thanks to scedwar]
+
+version 2008/03/13
+-- fixed support for node and user reference fields in single node scope,
+  verified support for both in other scopes
+
+version 2008/03/12
+-- added single node scope to require that specified fields on a node
+  have unique values
+-- improved error messages to specify which fields must be unique
+  and which include duplicates
+
+version 2008/02/22
+-- fixed queries to support table prefixes
+
+version 2008/02/18
+-- initial release

sites/all/modules/contrib/fields/unique_field/LICENSE.txt

@@ -0,0 +1,274 @@
+GNU GENERAL PUBLIC LICENSE
+
+              Version 2, June 1991
+
+Copyright (C) 1989, 1991 Free Software Foundation, Inc. 675 Mass Ave,
+Cambridge, MA 02139, USA. Everyone is permitted to copy and distribute
+verbatim copies of this license document, but changing it is not allowed.
+
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+          END OF TERMS AND CONDITIONS

sites/all/modules/contrib/fields/unique_field/README.txt

@@ -0,0 +1,33 @@
+/**
+ * Unique Field module for Drupal (unique_field)
+ * Compatible with Drupal 7.x
+ *
+ * By Joe Turgeon [http://arithmetric.com]
+ */
+
+The Unique Field module provides a way to require that specified fields
+or characteristics of a node are unique. This includes the node's title,
+author, language, taxonomy terms, and other fields.
+
+Without this module, Drupal and CCK do not prevent multiple nodes from
+having the same title or the same value in a given field.
+
+For example, if you have a content type with a Date field and there
+should only be one node per date, you could use this module to prevent a
+node from being saved with a date already used in another node.
+
+This module adds additional options to the administration page for each
+content type (i.e. admin/structure/types/manage/<content type>) for
+specifying which fields must be unique. The administrator may specify
+whether each field must be unique or whether the fields in combination must
+be unique. Also, the administrator can choose whether the fields must be
+unique among all other nodes or only among nodes from the given node's
+content type.
+
+Alternatively, you can select the 'single node' scope, which allows you
+to require that the specified fields are each unique on that node. For
+example, if a node has multiple, separate user reference fields, this
+setting will require that no user is selected more than once on one node.
+
+For more information, see this module's page at:
+http://drupal.org/project/unique_field

sites/all/modules/contrib/fields/unique_field/tests/core.test

@@ -0,0 +1,506 @@
+<?php
+
+/**
+ * @file
+ * Functional tests for the Unique Field module with Drupal core field types.
+ *
+ * The basic model for the tests:
+ *
+ * - Test each supported field type
+ * - Test each scope (by content type, language, all, or single node)
+ * - Test multiple fields individually and in combination
+ */
+
+class UniqueFieldCoreTestCase extends DrupalWebTestCase {
+  protected $privileged_user;
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Unique Field: Core tests',
+      'description' => 'Ensure that the Unique Field module functions properly with Drupal core field types.',
+      'group' => 'Unique Field',
+    );
+  }
+
+  public function setUp() {
+    parent::setUp('field', 'field_ui', 'number', 'text', 'unique_field');
+
+    // TODO: add tests for other types of fields: date, file, link, number, node
+    // reference, user reference, etc.
+
+    // Create and log in our privileged user.
+    $this->privileged_user = $this->drupalCreateUser(array(
+      'administer content types', 'administer nodes', 'bypass node access', 'unique_field_perm_admin', 'unique_field_perm_bypass',
+    ));
+    $this->drupalLogin($this->privileged_user);
+  }
+
+  /**
+   * Test the unique requirement on the title field in the content type scope.
+   */
+  public function testUniqueCtypeTitle() {
+    // Create a content type with the title set to be unique
+    $edit = array();
+    $edit['name'] = 'Unique Title';
+    $edit['type'] = 'uf_title';
+    $edit['unique_field_fields[title]'] = 'title';
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Title has been added.', 'Content type added.');
+
+    // Attempt to create 2 nodes with the same title
+    $title = $this->randomName(24);
+    $edit = array();
+    $edit['title'] = $title;
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-title', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Title (uf_title) node has been created');
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-title', $edit, t('Save'));
+    $this->assertText('The Title field requires a unique value, and the specified value is already used', 'Unique Title (uf_title) node with duplicate content could not be created');
+
+    // Check for false negative: Attempt to create a node with a unique title
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-title', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Title (uf_title) node has been created');
+  }
+
+  /**
+   * Test the unique requirement on the title field in the all scope.
+   */
+  public function testUniqueAllTitle() {
+    // Create a content type with the title set to be unique
+    $edit = array();
+    $edit['name'] = 'Unique Title';
+    $edit['type'] = 'uf_title';
+    $edit['unique_field_fields[title]'] = 'title';
+    $edit['unique_field_scope'] = UNIQUE_FIELD_SCOPE_ALL;
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Title has been added.', 'Content type added.');
+
+    // Create another content type with the title set to be unique
+    $edit = array();
+    $edit['name'] = 'Unique Title 2';
+    $edit['type'] = 'uf_title2';
+    $edit['unique_field_fields[title]'] = 'title';
+    $edit['unique_field_scope'] = UNIQUE_FIELD_SCOPE_ALL;
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Title 2 has been added.', 'Content type added.');
+
+    // Attempt to create 2 nodes with the same title in different content types
+    $title = $this->randomName(24);
+    $edit = array();
+    $edit['title'] = $title;
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-title', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Title (uf_title) node has been created');
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-title2', $edit, t('Save'));
+    $this->assertText('The Title field requires a unique value, and the specified value is already used', 'Unique Title (uf_title) node with duplicate content could not be created');
+
+    // Check for false negative: Attempt to create a node with a unique title
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-title2', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Title 2 (uf_title2) node has been created');
+  }
+
+  /**
+   * Test the unique requirement on the node author in the content type scope.
+   */
+  public function testUniqueCtypeAuthor() {
+    // Create a content type with the author set to be unique
+    $edit = array();
+    $edit['name'] = 'Unique Author';
+    $edit['type'] = 'uf_author';
+    $edit['unique_field_fields[name]'] = 'name';
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Author has been added.', 'Content type added.');
+
+    // Attempt to create 2 nodes with the same author
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-author', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Author (uf_author) node has been created');
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-author', $edit, t('Save'));
+    $this->assertText('The Author field requires a unique value, and the specified value is already used', 'Unique Author (uf_author) node with duplicate content could not be created');
+
+    // Check for false negative: Attempt to create a node with a unique author
+    $new_account = $this->drupalCreateUser(array('administer nodes', 'bypass node access'));
+    $this->drupalLogin($new_account);
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-author', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Author (uf_author) node has been created');
+  }
+
+  /**
+   * Test the unique requirement on the node author in the all scope.
+   */
+  public function testUniqueAllAuthor() {
+    // Create a content type with the author set to be unique
+    $edit = array();
+    $edit['name'] = 'Unique Author';
+    $edit['type'] = 'uf_author';
+    $edit['unique_field_fields[name]'] = 'name';
+    $edit['unique_field_scope'] = UNIQUE_FIELD_SCOPE_ALL;
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Author has been added.', 'Content type added.');
+
+    // Create another content type with the author set to be unique
+    $edit = array();
+    $edit['name'] = 'Unique Author 2';
+    $edit['type'] = 'uf_author2';
+    $edit['unique_field_fields[name]'] = 'name';
+    $edit['unique_field_scope'] = UNIQUE_FIELD_SCOPE_ALL;
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Author 2 has been added.', 'Content type added.');
+
+    // Attempt to create 2 nodes with the same author in different content types
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-author', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Author (uf_author) node has been created');
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-author2', $edit, t('Save'));
+    $this->assertText('The Author field requires a unique value, and the specified value is already used', 'Unique Author 2 (uf_author2) node with duplicate content could not be created');
+
+    // Check for false negative: Attempt to create a node with a unique title
+    $new_account = $this->drupalCreateUser(array('administer nodes', 'bypass node access'));
+    $this->drupalLogin($new_account);
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-author2', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Author 2 (uf_author2) node has been created');
+  }
+
+  /**
+   * Test the unique requirement on a text field in the content type scope.
+   */
+  public function testUniqueCtypeText() {
+    // Create a content type with a text field that is set to be unique
+    $edit = array();
+    $edit['name'] = 'Unique Text';
+    $edit['type'] = 'uf_text';
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Text has been added.', 'Content type added.');
+    $edit = array();
+    $edit['fields[_add_new_field][label]'] = 'Unique Text Text';
+    $edit['fields[_add_new_field][field_name]'] = 'uf_text_text';
+    $edit['fields[_add_new_field][type]'] = 'text';
+    $edit['fields[_add_new_field][widget_type]'] = 'text_textfield';
+    $this->drupalPost('admin/structure/types/manage/uf_text/fields', $edit, t('Save'));
+    $this->assertText('These settings apply to the Unique Text Text field everywhere it is used.', 'Field added to content type.');
+    $edit = array();
+    $edit['unique_field_fields[field_uf_text_text]'] = 'field_uf_text_text';
+    $this->drupalPost('admin/structure/types/manage/uf_text', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Text has been updated.', 'Content type updated.');
+
+    // Attempt to create 2 nodes with the same text field value
+    $text = $this->randomName(48);
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_text_text[und][0][value]'] = $text;
+    $this->drupalPost('node/add/uf-text', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Text (uf_text) node has been created');
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-text', $edit, t('Save'));
+    $this->assertText('The Unique Text Text field requires a unique value, and the specified value is already used', 'Unique Text (uf_text) node with duplicate content could not be created');
+
+    // Check for false negative: Attempt to create a node with a unique text
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_text_text[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-text', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Text (uf_text) node has been created');
+  }
+
+  /**
+   * Test the unique requirement on a text field in the all scope.
+   */
+  public function testUniqueAllText() {
+    // Create a content type with a text field that is set to be unique
+    $edit = array();
+    $edit['name'] = 'Unique Text';
+    $edit['type'] = 'uf_text';
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Text has been added.', 'Content type added.');
+    $edit = array();
+    $edit['fields[_add_new_field][label]'] = 'Unique Text Text';
+    $edit['fields[_add_new_field][field_name]'] = 'uf_text_text';
+    $edit['fields[_add_new_field][type]'] = 'text';
+    $edit['fields[_add_new_field][widget_type]'] = 'text_textfield';
+    $this->drupalPost('admin/structure/types/manage/uf_text/fields', $edit, t('Save'));
+    $this->assertText('These settings apply to the Unique Text Text field everywhere it is used.', 'Field added to content type.');
+    $edit = array();
+    $edit['unique_field_scope'] = UNIQUE_FIELD_SCOPE_ALL;
+    $edit['unique_field_fields[field_uf_text_text]'] = 'field_uf_text_text';
+    $this->drupalPost('admin/structure/types/manage/uf_text', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Text has been updated.', 'Content type updated.');
+
+    // Create another content type with the same text field and set it to unique
+    $edit = array();
+    $edit['name'] = 'Unique Text 2';
+    $edit['type'] = 'uf_text2';
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Text 2 has been added.', 'Content type added.');
+    $edit = array();
+    $edit['fields[_add_existing_field][label]'] = 'Unique Text 2 Text';
+    $edit['fields[_add_existing_field][field_name]'] = 'field_uf_text_text';
+    $edit['fields[_add_existing_field][widget_type]'] = 'text_textfield';
+    $this->drupalPost('admin/structure/types/manage/uf_text2/fields', $edit, t('Save'));
+    $this->assertText('These settings apply only to the Unique Text 2 Text field when used in the Unique Text 2 type.', 'Field added to content type.');
+    $edit = array();
+    $edit['unique_field_scope'] = UNIQUE_FIELD_SCOPE_ALL;
+    $edit['unique_field_fields[field_uf_text_text]'] = 'field_uf_text_text';
+    $this->drupalPost('admin/structure/types/manage/uf_text2', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Text 2 has been updated.', 'Content type updated.');
+
+    // Attempt to create 2 nodes with the same text in different content types
+    $text = $this->randomName(48);
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_text_text[und][0][value]'] = $text;
+    $this->drupalPost('node/add/uf-text', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Text (uf_text) node has been created');
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_text_text[und][0][value]'] = $text;
+    $this->drupalPost('node/add/uf-text2', $edit, t('Save'));
+    $this->assertText('The Unique Text 2 Text field requires a unique value, and the specified value is already used', 'Unique Text 2 (uf_text2) node with duplicate content could not be created');
+
+    // Check for false negative: Attempt to create a node with a unique text
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_text_text[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-text2', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Text 2 (uf_text2) node has been created');
+  }
+
+  /**
+   * Test the unique requirement on a text field in the single scope.
+   */
+  public function testUniqueSingleText() {
+    // Create a content type with two text fields that are set to be unique
+    $edit = array();
+    $edit['name'] = 'Unique Text Single';
+    $edit['type'] = 'uf_text_single';
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Text Single has been added.', 'Content type added.');
+    $edit = array();
+    $edit['fields[_add_new_field][label]'] = 'Unique Text Single Text 1';
+    $edit['fields[_add_new_field][field_name]'] = 'uf_text_single_text_1';
+    $edit['fields[_add_new_field][type]'] = 'text';
+    $edit['fields[_add_new_field][widget_type]'] = 'text_textfield';
+    $this->drupalPost('admin/structure/types/manage/uf_text_single/fields', $edit, t('Save'));
+    $this->assertText('These settings apply to the Unique Text Single Text 1 field everywhere it is used.', 'Field added to content type.');
+    $edit = array();
+    $edit['fields[_add_new_field][label]'] = 'Unique Text Single Text 2';
+    $edit['fields[_add_new_field][field_name]'] = 'uf_text_single_text_2';
+    $edit['fields[_add_new_field][type]'] = 'text';
+    $edit['fields[_add_new_field][widget_type]'] = 'text_textfield';
+    $this->drupalPost('admin/structure/types/manage/uf_text_single/fields', $edit, t('Save'));
+    $this->assertText('These settings apply to the Unique Text Single Text 2 field everywhere it is used.', 'Field added to content type.');
+    $edit = array();
+    $edit['unique_field_scope'] = UNIQUE_FIELD_SCOPE_NODE;
+    $edit['unique_field_fields[field_uf_text_single_text_1]'] = 'field_uf_text_single_text_1';
+    $edit['unique_field_fields[field_uf_text_single_text_2]'] = 'field_uf_text_single_text_2';
+    $this->drupalPost('admin/structure/types/manage/uf_text_single', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Text Single has been updated.', 'Content type updated.');
+
+    // Attempt to create a node with the same text in both fields
+    $text = $this->randomName(48);
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_text_single_text_1[und][0][value]'] = $text;
+    $edit['field_uf_text_single_text_2[und][0][value]'] = $text;
+    $this->drupalPost('node/add/uf-text-single', $edit, t('Save'));
+    $this->assertText('The Unique Text Single Text 2 fields must have unique values. The Unique Text Single Text 2 field has a value that is already used.', 'Unique Text Single (uf_text_single) node with duplicate content could not be created');
+
+    // Check for false negative: Attempt to create a node with unique text
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_text_single_text_1[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_text_single_text_2[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-text-single', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Text Single (uf_text_single) node has been created');
+  }
+
+  /**
+   * Test the unique requirement on an integer field in the content type scope.
+   */
+  public function testUniqueCtypeInteger() {
+    // Create a content type with an integer field that is set to be unique
+    $edit = array();
+    $edit['name'] = 'Unique Integer';
+    $edit['type'] = 'uf_int';
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Integer has been added.', 'Content type added.');
+    $edit = array();
+    $edit['fields[_add_new_field][label]'] = 'Unique Integer Integer';
+    $edit['fields[_add_new_field][field_name]'] = 'uf_int_int';
+    $edit['fields[_add_new_field][type]'] = 'number_integer';
+    $edit['fields[_add_new_field][widget_type]'] = 'number';
+    $this->drupalPost('admin/structure/types/manage/uf_int/fields', $edit, t('Save'));
+    $this->assertText('These settings apply to the Unique Integer Integer field everywhere it is used.', 'Field added to content type.');
+    $edit = array();
+    $edit['unique_field_fields[field_uf_int_int]'] = 'field_uf_int_int';
+    $this->drupalPost('admin/structure/types/manage/uf_int', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Integer has been updated.', 'Content type updated.');
+
+    // Attempt to create 2 nodes with the same integer value
+    $num = mt_rand();
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_int_int[und][0][value]'] = $num;
+    $this->drupalPost('node/add/uf-int', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Integer (uf_int) node has been created');
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-int', $edit, t('Save'));
+    $this->assertText('The Unique Integer Integer field requires a unique value, and the specified value is already used', 'Unique Integer (uf_int) node with duplicate content could not be created');
+
+    // Check for false negative: Attempt to create a node with a unique integer
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_int_int[und][0][value]'] = $num - 1;
+    $this->drupalPost('node/add/uf-int', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Integer (uf_int) node has been created');
+  }
+
+  /**
+   * Test the unique requirement on an integer field in the all scope.
+   */
+  public function testUniqueAllInteger() {
+    // Create a content type with an integer field that is set to be unique
+    $edit = array();
+    $edit['name'] = 'Unique Integer';
+    $edit['type'] = 'uf_int';
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Integer has been added.', 'Content type added.');
+    $edit = array();
+    $edit['fields[_add_new_field][label]'] = 'Unique Integer Integer';
+    $edit['fields[_add_new_field][field_name]'] = 'uf_int_int';
+    $edit['fields[_add_new_field][type]'] = 'number_integer';
+    $edit['fields[_add_new_field][widget_type]'] = 'number';
+    $this->drupalPost('admin/structure/types/manage/uf_int/fields', $edit, t('Save'));
+    $this->assertText('These settings apply to the Unique Integer Integer field everywhere it is used.', 'Field added to content type.');
+    $edit = array();
+    $edit['unique_field_scope'] = UNIQUE_FIELD_SCOPE_ALL;
+    $edit['unique_field_fields[field_uf_int_int]'] = 'field_uf_int_int';
+    $this->drupalPost('admin/structure/types/manage/uf_int', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Integer has been updated.', 'Content type updated.');
+
+    // Create another content type with the same integer field and set it to unique
+    $edit = array();
+    $edit['name'] = 'Unique Integer 2';
+    $edit['type'] = 'uf_int2';
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Integer 2 has been added.', 'Content type added.');
+    $edit = array();
+    $edit['fields[_add_existing_field][label]'] = 'Unique Integer 2 Integer';
+    $edit['fields[_add_existing_field][field_name]'] = 'field_uf_int_int';
+    $edit['fields[_add_existing_field][widget_type]'] = 'number';
+    $this->drupalPost('admin/structure/types/manage/uf_int2/fields', $edit, t('Save'));
+    $this->assertText('These settings apply only to the Unique Integer 2 Integer field when used in the Unique Integer 2 type.', 'Field added to content type.');
+    $edit = array();
+    $edit['unique_field_scope'] = UNIQUE_FIELD_SCOPE_ALL;
+    $edit['unique_field_fields[field_uf_int_int]'] = 'field_uf_int_int';
+    $this->drupalPost('admin/structure/types/manage/uf_int2', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Integer 2 has been updated.', 'Content type updated.');
+
+    // Attempt to create 2 nodes with the same integer in different content types
+    $num = mt_rand();
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_int_int[und][0][value]'] = $num;
+    $this->drupalPost('node/add/uf-int', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Integer (uf_int) node has been created');
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_int_int[und][0][value]'] = $num;
+    $this->drupalPost('node/add/uf-int2', $edit, t('Save'));
+    $this->assertText('The Unique Integer 2 Integer field requires a unique value, and the specified value is already used', 'Unique Integer 2 (uf_int2) node with duplicate content could not be created');
+
+    // Check for false negative: Attempt to create a node with a unique text
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_int_int[und][0][value]'] = $num - 1;
+    $this->drupalPost('node/add/uf-int2', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Integer 2 (uf_int2) node has been created');
+  }
+
+  /**
+   * Test the unique requirement on an integer field in the single scope.
+   */
+  public function testUniqueSingleInteger() {
+    // Create a content type with two integer fields that are set to be unique
+    $edit = array();
+    $edit['name'] = 'Unique Integer Single';
+    $edit['type'] = 'uf_int_single';
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Integer Single has been added.', 'Content type added.');
+    $edit = array();
+    $edit['fields[_add_new_field][label]'] = 'Unique Integer Single Integer 1';
+    $edit['fields[_add_new_field][field_name]'] = 'uf_int_single_int_1';
+    $edit['fields[_add_new_field][type]'] = 'number_integer';
+    $edit['fields[_add_new_field][widget_type]'] = 'number';
+    $this->drupalPost('admin/structure/types/manage/uf_int_single/fields', $edit, t('Save'));
+    $this->assertText('These settings apply to the Unique Integer Single Integer 1 field everywhere it is used.', 'Field added to content type.');
+    $edit = array();
+    $edit['fields[_add_new_field][label]'] = 'Unique Integer Single Integer 2';
+    $edit['fields[_add_new_field][field_name]'] = 'uf_int_single_int_2';
+    $edit['fields[_add_new_field][type]'] = 'number_integer';
+    $edit['fields[_add_new_field][widget_type]'] = 'number';
+    $this->drupalPost('admin/structure/types/manage/uf_int_single/fields', $edit, t('Save'));
+    $this->assertText('These settings apply to the Unique Integer Single Integer 2 field everywhere it is used.', 'Field added to content type.');
+    $edit = array();
+    $edit['unique_field_scope'] = UNIQUE_FIELD_SCOPE_NODE;
+    $edit['unique_field_fields[field_uf_int_single_int_1]'] = 'field_uf_int_single_int_1';
+    $edit['unique_field_fields[field_uf_int_single_int_2]'] = 'field_uf_int_single_int_2';
+    $this->drupalPost('admin/structure/types/manage/uf_int_single', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Integer Single has been updated.', 'Content type updated.');
+
+    // Attempt to create a node with the same integer in both fields
+    $num = mt_rand();
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_int_single_int_1[und][0][value]'] = $num;
+    $edit['field_uf_int_single_int_2[und][0][value]'] = $num;
+    $this->drupalPost('node/add/uf-int-single', $edit, t('Save'));
+    $this->assertText('The Unique Integer Single Integer 2 fields must have unique values. The Unique Integer Single Integer 2 field has a value that is already used.', 'Unique Integer Single (uf_int_single) node with duplicate content could not be created');
+
+    // Check for false negative: Attempt to create a node with unique numbers
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_int_single_int_1[und][0][value]'] = $num;
+    $edit['field_uf_int_single_int_2[und][0][value]'] = $num - 1;
+    $this->drupalPost('node/add/uf-int-single', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Integer Single (uf_int_single) node has been created');
+  }
+
+}

sites/all/modules/contrib/fields/unique_field/tests/date.test

@@ -0,0 +1,227 @@
+<?php
+
+/**
+ * @file
+ * Functional tests for the Unique Field module with Date field types.
+ */
+
+class UniqueFieldDateTestCase extends DrupalWebTestCase {
+  protected $privileged_user;
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Unique Field: Date module tests',
+      'description' => 'Ensure that the Unique Field module functions properly with Date field types.',
+      'group' => 'Unique Field',
+    );
+  }
+
+  public function setUp() {
+    parent::setUp('field', 'field_ui', 'options', 'date', 'unique_field');
+
+    // Create and log in our privileged user.
+    $this->privileged_user = $this->drupalCreateUser(array(
+      'administer content types', 'administer nodes', 'bypass node access', 'unique_field_perm_admin', 'unique_field_perm_bypass',
+    ));
+    $this->drupalLogin($this->privileged_user);
+  }
+
+  /**
+   * Test the unique requirement on a date field in the content type scope.
+   */
+  public function testUniqueCtypeNode() {
+    // Create a content type with a node reference field that is set to be
+    // unique
+    $edit = array();
+    $edit['name'] = 'Unique Node';
+    $edit['type'] = 'uf_node';
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Node has been added.', 'Content type added.');
+    $edit = array();
+    $edit['fields[_add_new_field][label]'] = 'Unique Node Date';
+    $edit['fields[_add_new_field][field_name]'] = 'uf_node_date';
+    $edit['fields[_add_new_field][type]'] = 'date';
+    $edit['fields[_add_new_field][widget_type]'] = 'date_select';
+    $this->drupalPost('admin/structure/types/manage/uf_node/fields', $edit, t('Save'));
+    $this->assertText('These settings apply to the Unique Node Date field everywhere it is used.', 'Field added to content type.');
+    $edit = array();
+    $edit['unique_field_fields[field_uf_node_date]'] = 'field_uf_node_date';
+    $this->drupalPost('admin/structure/types/manage/uf_node', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Node has been updated.', 'Content type updated.');
+
+    // Attempt to create 2 nodes with the same date value
+    $date = new DateTime('2011-07-11 11:11:11');
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_node_date[und][0][value][month]'] = $date->format('n');
+    $edit['field_uf_node_date[und][0][value][day]'] = $date->format('j');
+    $edit['field_uf_node_date[und][0][value][year]'] = $date->format('Y');
+    $edit['field_uf_node_date[und][0][value][hour]'] = $date->format('G');
+    $edit['field_uf_node_date[und][0][value][minute]'] = $date->format('i');
+    $this->drupalPost('node/add/uf-node', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Node (uf_node) node has been created');
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-node', $edit, t('Save'));
+    $this->assertText('The Unique Node Date field requires a unique value, and the specified value is already used', 'Unique Node (uf_node) node with duplicate content could not be created');
+
+    // Check for false negative: Attempt to create a node with a unique date
+    $date = new DateTime('2010-02-02 17:43:11');
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_node_date[und][0][value][month]'] = $date->format('n');
+    $edit['field_uf_node_date[und][0][value][day]'] = $date->format('j');
+    $edit['field_uf_node_date[und][0][value][year]'] = $date->format('Y');
+    $edit['field_uf_node_date[und][0][value][hour]'] = $date->format('G');
+    $edit['field_uf_node_date[und][0][value][minute]'] = $date->format('i');
+    $this->drupalPost('node/add/uf-node', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Node (uf_node) node has been created');
+  }
+
+  /**
+   * Test the unique requirement on a date field in the all scope.
+   */
+  public function testUniqueAllNode() {
+    // Create a content type with a node reference field that is set to be
+    // unique
+    $edit = array();
+    $edit['name'] = 'Unique Node';
+    $edit['type'] = 'uf_node';
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Node has been added.', 'Content type added.');
+    $edit = array();
+    $edit['fields[_add_new_field][label]'] = 'Unique Node Date';
+    $edit['fields[_add_new_field][field_name]'] = 'uf_node_date';
+    $edit['fields[_add_new_field][type]'] = 'date';
+    $edit['fields[_add_new_field][widget_type]'] = 'date_select';
+    $this->drupalPost('admin/structure/types/manage/uf_node/fields', $edit, t('Save'));
+    $this->assertText('These settings apply to the Unique Node Date field everywhere it is used.', 'Field added to content type.');
+    $edit = array();
+    $edit['unique_field_fields[field_uf_node_date]'] = 'field_uf_node_date';
+    $edit['unique_field_scope'] = UNIQUE_FIELD_SCOPE_ALL;
+    $this->drupalPost('admin/structure/types/manage/uf_node', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Node has been updated.', 'Content type updated.');
+
+    // Create another content type with a node reference field that is set to be
+    // unique
+    $edit = array();
+    $edit['name'] = 'Unique Node 2';
+    $edit['type'] = 'uf_node2';
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Node 2 has been added.', 'Content type added.');
+    $edit = array();
+    $edit['fields[_add_existing_field][label]'] = 'Unique Node 2 Date';
+    $edit['fields[_add_existing_field][field_name]'] = 'field_uf_node_date';
+    $edit['fields[_add_existing_field][widget_type]'] = 'date_select';
+    $this->drupalPost('admin/structure/types/manage/uf_node2/fields', $edit, t('Save'));
+    $this->assertText('These settings apply only to the Unique Node 2 Date field when used in the Unique Node 2 type.', 'Field added to content type.');
+    $edit = array();
+    $edit['unique_field_fields[field_uf_node_date]'] = 'field_uf_node_date';
+    $edit['unique_field_scope'] = UNIQUE_FIELD_SCOPE_ALL;
+    $this->drupalPost('admin/structure/types/manage/uf_node2', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Node 2 has been updated.', 'Content type updated.');
+
+    // Attempt to create 2 nodes with the same date value in different content
+    // types
+    $date = new DateTime('2011-03-28 04:27:33');
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_node_date[und][0][value][month]'] = $date->format('n');
+    $edit['field_uf_node_date[und][0][value][day]'] = $date->format('j');
+    $edit['field_uf_node_date[und][0][value][year]'] = $date->format('Y');
+    $edit['field_uf_node_date[und][0][value][hour]'] = $date->format('G');
+    $edit['field_uf_node_date[und][0][value][minute]'] = $date->format('i');
+    $this->drupalPost('node/add/uf-node', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Node (uf_node) node has been created');
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-node2', $edit, t('Save'));
+    $this->assertText('The Unique Node 2 Date field requires a unique value, and the specified value is already used', 'Unique Node 2 (uf_node2) node with duplicate content could not be created');
+
+    // Check for false negative: Attempt to create a node with a unique date
+    $date = new DateTime('2010-11-19 13:23:31');
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_node_date[und][0][value][month]'] = $date->format('n');
+    $edit['field_uf_node_date[und][0][value][day]'] = $date->format('j');
+    $edit['field_uf_node_date[und][0][value][year]'] = $date->format('Y');
+    $edit['field_uf_node_date[und][0][value][hour]'] = $date->format('G');
+    $edit['field_uf_node_date[und][0][value][minute]'] = $date->format('i');
+    $this->drupalPost('node/add/uf-node2', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Node 2 (uf_node2) node has been created');
+  }
+
+  /**
+   * Test the unique requirement on a date field in the single scope.
+   */
+  public function testUniqueSingleNode() {
+    // Create a content type with two date fields that are set to be unique
+    $edit = array();
+    $edit['name'] = 'Unique Node Single';
+    $edit['type'] = 'uf_node_single';
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Node Single has been added.', 'Content type added.');
+    $edit = array();
+    $edit['fields[_add_new_field][label]'] = 'Unique Node Single Date 1';
+    $edit['fields[_add_new_field][field_name]'] = 'uf_node_single_date_1';
+    $edit['fields[_add_new_field][type]'] = 'date';
+    $edit['fields[_add_new_field][widget_type]'] = 'date_select';
+    $this->drupalPost('admin/structure/types/manage/uf_node_single/fields', $edit, t('Save'));
+    $this->assertText('These settings apply to the Unique Node Single Date 1 field everywhere it is used.', 'Field added to content type.');
+    $edit = array();
+    $edit['fields[_add_new_field][label]'] = 'Unique Node Single Date 2';
+    $edit['fields[_add_new_field][field_name]'] = 'uf_node_single_date_2';
+    $edit['fields[_add_new_field][type]'] = 'date';
+    $edit['fields[_add_new_field][widget_type]'] = 'date_select';
+    $this->drupalPost('admin/structure/types/manage/uf_node_single/fields', $edit, t('Save'));
+    $this->assertText('These settings apply to the Unique Node Single Date 2 field everywhere it is used.', 'Field added to content type.');
+    $edit = array();
+    $edit['unique_field_scope'] = UNIQUE_FIELD_SCOPE_NODE;
+    $edit['unique_field_fields[field_uf_node_single_date_1]'] = 'field_uf_node_single_date_1';
+    $edit['unique_field_fields[field_uf_node_single_date_2]'] = 'field_uf_node_single_date_2';
+    $this->drupalPost('admin/structure/types/manage/uf_node_single', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Node Single has been updated.', 'Content type updated.');
+
+    // Attempt to create a node with the same date in both fields
+    $date = new DateTime('2011-06-12 19:08:22');
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_node_single_date_1[und][0][value][month]'] = $date->format('n');
+    $edit['field_uf_node_single_date_1[und][0][value][day]'] = $date->format('j');
+    $edit['field_uf_node_single_date_1[und][0][value][year]'] = $date->format('Y');
+    $edit['field_uf_node_single_date_1[und][0][value][hour]'] = $date->format('G');
+    $edit['field_uf_node_single_date_1[und][0][value][minute]'] = $date->format('i');
+    $edit['field_uf_node_single_date_2[und][0][value][month]'] = $date->format('n');
+    $edit['field_uf_node_single_date_2[und][0][value][day]'] = $date->format('j');
+    $edit['field_uf_node_single_date_2[und][0][value][year]'] = $date->format('Y');
+    $edit['field_uf_node_single_date_2[und][0][value][hour]'] = $date->format('G');
+    $edit['field_uf_node_single_date_2[und][0][value][minute]'] = $date->format('i');
+    $this->drupalPost('node/add/uf-node-single', $edit, t('Save'));
+    $this->assertText('The Unique Node Single Date 2 fields must have unique values. The Unique Node Single Date 2 field has a value that is already used.', 'Unique Node Single (uf_node_single) node with duplicate content could not be created');
+
+    // Check for false negative: Attempt to create a node with unique text
+    $date1 = new DateTime('2011-01-12 19:08:22');
+    $date2 = new DateTime('2011-04-12 19:08:22');
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_node_single_date_1[und][0][value][month]'] = $date1->format('n');
+    $edit['field_uf_node_single_date_1[und][0][value][day]'] = $date1->format('j');
+    $edit['field_uf_node_single_date_1[und][0][value][year]'] = $date1->format('Y');
+    $edit['field_uf_node_single_date_1[und][0][value][hour]'] = $date1->format('G');
+    $edit['field_uf_node_single_date_1[und][0][value][minute]'] = $date1->format('i');
+    $edit['field_uf_node_single_date_2[und][0][value][month]'] = $date2->format('n');
+    $edit['field_uf_node_single_date_2[und][0][value][day]'] = $date2->format('j');
+    $edit['field_uf_node_single_date_2[und][0][value][year]'] = $date2->format('Y');
+    $edit['field_uf_node_single_date_2[und][0][value][hour]'] = $date2->format('G');
+    $edit['field_uf_node_single_date_2[und][0][value][minute]'] = $date2->format('i');
+    $this->drupalPost('node/add/uf-node-single', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Node Single (uf_node_single) node has been created');
+  }
+
+}

sites/all/modules/contrib/fields/unique_field/tests/references.test

@@ -0,0 +1,238 @@
+<?php
+
+/**
+ * @file
+ * Functional tests for the Unique Field module with References field types.
+ */
+
+class UniqueFieldReferencesTestCase extends DrupalWebTestCase {
+  protected $privileged_user;
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Unique Field: References module tests',
+      'description' => 'Ensure that the Unique Field module functions properly with References field types.',
+      'group' => 'Unique Field',
+    );
+  }
+
+  public function setUp() {
+    parent::setUp('field', 'field_ui', 'options', 'node_reference', 'user_reference', 'unique_field');
+
+    // Create and log in our privileged user.
+    $this->privileged_user = $this->drupalCreateUser(array(
+      'administer content types', 'administer nodes', 'bypass node access', 'unique_field_perm_admin', 'unique_field_perm_bypass',
+    ));
+    $this->drupalLogin($this->privileged_user);
+  }
+
+  /**
+   * Test the unique requirement on a node reference field in the content type
+   * scope.
+   */
+  public function testUniqueCtypeNode() {
+    // Create a content type with a node reference field that is set to be
+    // unique
+    $edit = array();
+    $edit['name'] = 'Unique Node';
+    $edit['type'] = 'uf_node';
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Node has been added.', 'Content type added.');
+    $edit = array();
+    $edit['fields[_add_new_field][label]'] = 'Unique Node Node';
+    $edit['fields[_add_new_field][field_name]'] = 'uf_node_node';
+    $edit['fields[_add_new_field][type]'] = 'node_reference';
+    $edit['fields[_add_new_field][widget_type]'] = 'options_select';
+    $this->drupalPost('admin/structure/types/manage/uf_node/fields', $edit, t('Save'));
+    $this->assertText('These settings apply to the Unique Node Node field everywhere it is used.', 'Field added to content type.');
+    $edit = array();
+    $edit['field[settings][referenceable_types][uf_node]'] = 'uf_node';
+    $this->drupalPost('admin/structure/types/manage/uf_node/fields/field_uf_node_node/field-settings', $edit, t('Save field settings'));
+    $this->assertText('Updated field Unique Node Node field settings.', 'Node reference field configured.');
+    $edit = array();
+    $edit['unique_field_fields[field_uf_node_node]'] = 'field_uf_node_node';
+    $this->drupalPost('admin/structure/types/manage/uf_node', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Node has been updated.', 'Content type updated.');
+
+    // Create a node to be referenced
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-node', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Node (uf_node) node has been created');
+
+    // Attempt to create 2 nodes that reference the same node
+    $ref_nid = 1;
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_node_node[und]'] = $ref_nid;
+    $this->drupalPost('node/add/uf-node', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Node (uf_node) node has been created');
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-node', $edit, t('Save'));
+    $this->assertText('The Unique Node Node field requires a unique value, and the specified value is already used', 'Unique Node (uf_node) node with duplicate content could not be created');
+
+    // Check for false negative: Attempt to create a node with a unique text
+    $ref_nid = 2;
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_node_node[und]'] = $ref_nid;
+    $this->drupalPost('node/add/uf-node', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Node (uf_node) node has been created');
+  }
+
+  /**
+   * Test the unique requirement on a node reference field in the all scope.
+   */
+  public function testUniqueAllNode() {
+    // Create a content type with a node reference field that is set to be
+    // unique
+    $edit = array();
+    $edit['name'] = 'Unique Node';
+    $edit['type'] = 'uf_node';
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Node has been added.', 'Content type added.');
+    $edit = array();
+    $edit['fields[_add_new_field][label]'] = 'Unique Node Node';
+    $edit['fields[_add_new_field][field_name]'] = 'uf_node_node';
+    $edit['fields[_add_new_field][type]'] = 'node_reference';
+    $edit['fields[_add_new_field][widget_type]'] = 'options_select';
+    $this->drupalPost('admin/structure/types/manage/uf_node/fields', $edit, t('Save'));
+    $this->assertText('These settings apply to the Unique Node Node field everywhere it is used.', 'Field added to content type.');
+    $edit = array();
+    $edit['field[settings][referenceable_types][uf_node]'] = 'uf_node';
+    $this->drupalPost('admin/structure/types/manage/uf_node/fields/field_uf_node_node/field-settings', $edit, t('Save field settings'));
+    $this->assertText('Updated field Unique Node Node field settings.', 'Node reference field configured.');
+    $edit = array();
+    $edit['unique_field_fields[field_uf_node_node]'] = 'field_uf_node_node';
+    $edit['unique_field_scope'] = UNIQUE_FIELD_SCOPE_ALL;
+    $this->drupalPost('admin/structure/types/manage/uf_node', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Node has been updated.', 'Content type updated.');
+
+    // Create another content type with the same text field and set it to unique
+    $edit = array();
+    $edit['name'] = 'Unique Node 2';
+    $edit['type'] = 'uf_node2';
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Node 2 has been added.', 'Content type added.');
+    $edit = array();
+    $edit['fields[_add_existing_field][label]'] = 'Unique Node 2 Node';
+    $edit['fields[_add_existing_field][field_name]'] = 'field_uf_node_node';
+    $edit['fields[_add_existing_field][widget_type]'] = 'options_select';
+    $this->drupalPost('admin/structure/types/manage/uf_node2/fields', $edit, t('Save'));
+    $this->assertText('These settings apply only to the Unique Node 2 Node field when used in the Unique Node 2 type.', 'Field added to content type.');
+    $edit = array();
+    $edit['field[settings][referenceable_types][uf_node]'] = 'uf_node';
+    $this->drupalPost('admin/structure/types/manage/uf_node2/fields/field_uf_node_node/field-settings', $edit, t('Save field settings'));
+    $this->assertText('Updated field Unique Node 2 Node field settings.', 'Node reference field configured.');
+    $edit = array();
+    $edit['unique_field_fields[field_uf_node_node]'] = 'field_uf_node_node';
+    $edit['unique_field_scope'] = UNIQUE_FIELD_SCOPE_ALL;
+    $this->drupalPost('admin/structure/types/manage/uf_node2', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Node 2 has been updated.', 'Content type updated.');
+
+    // Create a node to be referenced
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-node', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Node (uf_node) node has been created');
+
+    // Attempt to create 2 nodes that reference the same node in different
+    // content types
+    $ref_nid = 1;
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_node_node[und]'] = $ref_nid;
+    $this->drupalPost('node/add/uf-node', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Node (uf_node) node has been created');
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-node2', $edit, t('Save'));
+    $this->assertText('The Unique Node 2 Node field requires a unique value, and the specified value is already used', 'Unique Node 2 (uf_node2) node with duplicate content could not be created');
+
+    // Check for false negative: Attempt to create a node with a unique text
+    $ref_nid = 2;
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_node_node[und]'] = $ref_nid;
+    $this->drupalPost('node/add/uf-node2', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Node 2 (uf_node2) node has been created');
+  }
+
+  /**
+   * Test the unique requirement on a node reference field in the single scope.
+   */
+  public function testUniqueSingleNode() {
+    // Create a content type with two node reference fields that are set to be
+    // unique
+    $edit = array();
+    $edit['name'] = 'Unique Node Single';
+    $edit['type'] = 'uf_node_single';
+    $this->drupalPost('admin/structure/types/add', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Node Single has been added.', 'Content type added.');
+    $edit = array();
+    $edit['fields[_add_new_field][label]'] = 'Unique Node Single Node 1';
+    $edit['fields[_add_new_field][field_name]'] = 'uf_node_single_node_1';
+    $edit['fields[_add_new_field][type]'] = 'node_reference';
+    $edit['fields[_add_new_field][widget_type]'] = 'options_select';
+    $this->drupalPost('admin/structure/types/manage/uf_node_single/fields', $edit, t('Save'));
+    $this->assertText('These settings apply to the Unique Node Single Node 1 field everywhere it is used.', 'Field added to content type.');
+    $edit = array();
+    $edit['field[settings][referenceable_types][uf_node_single]'] = 'uf_node_single';
+    $this->drupalPost('admin/structure/types/manage/uf_node_single/fields/field_uf_node_single_node_1/field-settings', $edit, t('Save field settings'));
+    $this->assertText('Updated field Unique Node Single Node 1 field settings.', 'Node reference field configured.');
+    $edit = array();
+    $edit['fields[_add_new_field][label]'] = 'Unique Node Single Node 2';
+    $edit['fields[_add_new_field][field_name]'] = 'uf_node_single_node_2';
+    $edit['fields[_add_new_field][type]'] = 'node_reference';
+    $edit['fields[_add_new_field][widget_type]'] = 'options_select';
+    $this->drupalPost('admin/structure/types/manage/uf_node_single/fields', $edit, t('Save'));
+    $this->assertText('These settings apply to the Unique Node Single Node 2 field everywhere it is used.', 'Field added to content type.');
+    $edit = array();
+    $edit['field[settings][referenceable_types][uf_node_single]'] = 'uf_node_single';
+    $this->drupalPost('admin/structure/types/manage/uf_node_single/fields/field_uf_node_single_node_2/field-settings', $edit, t('Save field settings'));
+    $this->assertText('Updated field Unique Node Single Node 2 field settings.', 'Node reference field configured.');
+    $edit = array();
+    $edit['unique_field_scope'] = UNIQUE_FIELD_SCOPE_NODE;
+    $edit['unique_field_fields[field_uf_node_single_node_1]'] = 'field_uf_node_single_node_1';
+    $edit['unique_field_fields[field_uf_node_single_node_2]'] = 'field_uf_node_single_node_2';
+    $this->drupalPost('admin/structure/types/manage/uf_node_single', $edit, t('Save content type'));
+    $this->assertText('The content type Unique Node Single has been updated.', 'Content type updated.');
+
+    // Create a node to be referenced
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-node-single', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Node Single (uf_node_single) node has been created');
+
+    // Attempt to create a node with the same text in both fields
+    $ref_nid = 1;
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_node_single_node_1[und]'] = $ref_nid;
+    $edit['field_uf_node_single_node_2[und]'] = $ref_nid;
+    $this->drupalPost('node/add/uf-node-single', $edit, t('Save'));
+    $this->assertText('The Unique Node Single Node 2 fields must have unique values. The Unique Node Single Node 2 field has a value that is already used.', 'Unique Node Single (uf_node_single) node with duplicate content could not be created');
+
+    // Check for false negative: Attempt to create a node with unique text
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $this->drupalPost('node/add/uf-node-single', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Node Single (uf_node_single) node has been created');
+    $edit = array();
+    $edit['title'] = $this->randomName(24);
+    $edit['body[und][0][value]'] = $this->randomName(48);
+    $edit['field_uf_node_single_node_1[und]'] = 1;
+    $edit['field_uf_node_single_node_2[und]'] = 2;
+    $this->drupalPost('node/add/uf-node-single', $edit, t('Save'));
+    $this->assertText($edit['body[und][0][value]'], 'Unique Node Single (uf_node_single) node has been created');
+  }
+
+}

sites/all/modules/contrib/fields/unique_field/unique_field.info

@@ -0,0 +1,15 @@
+name = Unique Field
+description = "Provides content validation requirement that a node's author, language, taxonomy terms, or other fields are unique."
+core = 7.x
+files[] = unique_field.module
+files[] = unique_field.install
+files[] = tests/core.test
+files[] = tests/date.test
+files[] = tests/references.test
+
+; Information added by drupal.org packaging script on 2011-07-26
+version = "7.x-1.0-rc1"
+core = "7.x"
+project = "unique_field"
+datestamp = "1311648120"
+

sites/all/modules/contrib/fields/unique_field/unique_field.install

@@ -0,0 +1,16 @@
+<?php
+
+/**
+ * @file
+ * Installation/uninstallation routines for the unique_field module.
+ */
+
+/**
+ * Implements hook_uninstall().
+ *
+ * Deletes all module variables and then clears the variables cache.
+ */
+function unique_field_uninstall() {
+  db_query("DELETE FROM {variable} WHERE name LIKE 'unique\_field\_%'");
+  cache_clear_all('variables', 'cache');
+}

sites/all/modules/contrib/fields/unique_field/unique_field.module

@@ -0,0 +1,393 @@
+<?php
+
+/**
+ * @file
+ * Provides content validation requirement that a node's author,
+ * language, taxonomy terms, or other fields are unique.
+ *
+ * Unique Field module
+ * Compatible with Drupal 7.x
+ *
+ * By Joe Turgeon [http://arithmetric.com]
+ */
+
+// query scope definitions
+define('UNIQUE_FIELD_SCOPE_NODE', 'node');
+define('UNIQUE_FIELD_SCOPE_TYPE', 'type');
+define('UNIQUE_FIELD_SCOPE_LANGUAGE', 'language');
+define('UNIQUE_FIELD_SCOPE_ALL', 'all');
+
+// query comparison definitions
+define('UNIQUE_FIELD_COMP_EACH', 'each');
+define('UNIQUE_FIELD_COMP_ALL', 'all');
+
+// query field definitions
+define('UNIQUE_FIELD_FIELDS_TITLE', 'title');
+define('UNIQUE_FIELD_FIELDS_AUTHOR', 'name');
+define('UNIQUE_FIELD_FIELDS_LANGUAGE', 'language');
+
+// setting definition
+define('UNIQUE_FIELD_SHOW_MATCHES', 'show_matches');
+
+/**
+ * Implements hook_help().
+ */
+function unique_field_help($path, $arg) {
+  switch ($path) {
+    case 'admin/help#unique_field':
+      $output = '<p>' . t("The Unique Field module allows administrators to require that content supplied for specified fields is unique. For example, you may require that each node has a unique title or a different author. For configuration options, please see the <em>Unique Field restrictions</em> section of a content type's administration page.") . '</p>';
+      return $output;
+  }
+}
+
+/**
+ * Implements hook_permission().
+ */
+function unique_field_permission() {
+  return array(
+    'unique_field_perm_admin' => array(
+      'title' => t('Designate fields as unique'),
+      'description' => t('Configure whether any fields of a content type should be unique.'),
+    ),
+    'unique_field_perm_bypass' => array(
+      'title' => t('Bypass requirement that fields are unique'),
+      'description' => t('Allows users to ignore errors about duplicate content and submit it anyway.'),
+    ),
+  );
+}
+
+/**
+ * Implements hook_form_alter().
+ */
+function unique_field_form_alter(&$form, &$form_state, $form_id) {
+  if ($form_id === 'node_type_form' && user_access('unique_field_perm_admin') && isset($form['#node_type'])) {
+    unique_field_node_settings_form($form);
+  }
+  elseif (strpos($form_id, 'node_form') !== FALSE && user_access('unique_field_perm_bypass')) {
+    $form['unique_field_override'] = array(
+      '#type' => 'hidden',
+      '#default_value' => '0',
+    );
+  }
+}
+
+/**
+ * Implements hook_node_validate().
+ */
+function unique_field_node_validate($node, $form) {
+  // skip validation if deleting a node or if override value is set
+  if ((!empty($node->op) && !empty($node->delete) && $node->op === $node->delete) || (is_array($form) && isset($form['unique_field_override']) && is_array($form['unique_field_override']) && $form['unique_field_override']['#value'] && user_access('unique_field_perm_bypass'))) {
+    return;
+  }
+
+  // get list of unique fields for node type
+  $fields = variable_get('unique_field_fields_' . $node->type, array());
+
+  // check if there are unique fields for this node type
+  if (count($fields)) {
+
+    // get unique field settings for this node type
+    $scope = variable_get('unique_field_scope_' . $node->type, UNIQUE_FIELD_SCOPE_TYPE);
+    $comp = variable_get('unique_field_comp_' . $node->type, UNIQUE_FIELD_COMP_EACH);
+    $var_show_matches = variable_get('unique_field_show_matches_' . $node->type, array());
+    $show_matches = is_array($var_show_matches) && in_array(UNIQUE_FIELD_SHOW_MATCHES, $var_show_matches);
+
+    // initialization
+    $errmsg = NULL;
+    $errfld = array();
+    $matches = array();
+    $allmatch = NULL;
+
+    // check fields for node scope
+    if ($scope === UNIQUE_FIELD_SCOPE_NODE) {
+      $values = array();
+      foreach ($fields as $field) {
+        $new_values = array();
+        if ($field === UNIQUE_FIELD_FIELDS_TITLE) {
+          $new_values[] = $node->title;
+        }
+        else {
+          // Ensure that the field content exists. For example, if field
+          // permissions are enabled, the field may be missing for some users.
+          // Make sure to use the field API function, e.g. to respect language.
+          $fvalues = field_get_items('node', $node, $field);
+          if (empty($fvalues)) {
+            continue;
+          }
+          $field_info = field_info_field($field);
+          $field_keys = array_keys($field_info['columns']);
+          foreach ($fvalues as $index => $value) {
+            if (is_numeric($index)) {
+              $field_combined = array();
+              foreach ($field_keys as $key) {
+                if (isset($fvalues[$index][$key]) && !empty($fvalues[$index][$key])) {
+                  $field_combined[$key] = $fvalues[$index][$key];
+                }
+              }
+              if (!empty($field_combined)) {
+                $new_values[] = serialize($field_combined);
+              }
+            }
+          }
+        }
+        $new_values = array_merge($values, $new_values);
+        $values = array_unique($new_values);
+        if (serialize($values) !== serialize($new_values)) {
+          $errfld[] = $field;
+        }
+      }
+      if (count($errfld) > 0) {
+        $errmsg = t('The @labels fields must have unique values. The @label field has a value that is already used.');
+      }
+    }
+
+    // check fields for other scopes
+    else {
+      foreach ($fields as $field) {
+        $values = '';
+        if ($field === UNIQUE_FIELD_FIELDS_TITLE) {
+          $values = $node->title;
+        }
+        elseif ($field === UNIQUE_FIELD_FIELDS_AUTHOR) {
+          $values = $node->uid;
+        }
+        elseif ($field === UNIQUE_FIELD_FIELDS_LANGUAGE) {
+          $values = $node->language;
+        }
+        else {
+          // Ensure that the field content exists. For example, if field
+          // permissions are enabled, the field may be missing for some users.
+          // Make sure to use the field API function, e.g. to respect language.
+          $fvalues = field_get_items('node', $node, $field);
+          if (empty($fvalues)) {
+            continue;
+          }
+          foreach ($fvalues as $index => $value) {
+            if (!is_numeric($index) || !is_array($value)) {
+              unset($fvalues[$index]);
+            }
+          }
+          $field_info = field_info_field($field);
+          $values = _field_filter_items($field_info, $fvalues);
+        }
+        if (empty($values)) {
+          continue;
+        }
+        $match = unique_field_match_value($field, $values, $scope, $node->type, $node->language);
+        // remove matches of this node
+        if ($node->nid && is_array($match) && in_array($node->nid, $match)) {
+          $key = array_search($node->nid, $match);
+          unset($match[$key]);
+        }
+        if ($comp === UNIQUE_FIELD_COMP_EACH && is_array($match) && count($match)) {
+          $errfld[] = $field;
+          $errmsg = t('The @label field requires a unique value, and the specified value is already used.');
+        }
+        $matches[$field] = $match;
+        $allmatch = is_array($allmatch) ? array_intersect($allmatch, $match) : $match;
+      }
+
+      // check for fields in combination
+      if ($comp === UNIQUE_FIELD_COMP_ALL && is_array($allmatch) && count($allmatch)) {
+        foreach ($fields as $field) {
+          $errfld[] = $field;
+          $matches[$field] = $allmatch;
+        }
+        $errmsg = t('This form requires that the fields @labels are a unique combination. The specified values are already used.');
+      }
+    }
+
+    // common error messages
+    if ($errmsg && !empty($errmsg) && is_array($errfld) && count($errfld) > 0) {
+      $labels = array();
+      foreach ($errfld as $field) {
+        if ($field === UNIQUE_FIELD_FIELDS_TITLE) {
+          $nodetype = node_type_get_type($node->type);
+          $labels[$field] = $nodetype->title_label;
+        }
+        elseif ($field === UNIQUE_FIELD_FIELDS_AUTHOR) {
+          $labels[$field] = t('Author');
+        }
+        elseif ($field === UNIQUE_FIELD_FIELDS_LANGUAGE) {
+          $labels[$field] = t('Language');
+        }
+        else {
+          $fld = field_info_instance('node', $field, $node->type);
+          $labels[$field] = $fld['label'];
+        }
+      }
+      foreach ($errfld as $field) {
+        $msg = strtr($errmsg, array('@label' => check_plain($labels[$field]), '@labels' => check_plain(join(', ', $labels))));
+        if ($show_matches && isset($matches[$field]) && is_array($matches[$field]) && count($matches[$field])) {
+          $list_items = array();
+          foreach ($matches[$field] as $nid) {
+            $match_node = node_load($nid);
+            if (node_access('view', $match_node)) {
+              $list_items[] = l($match_node->title, 'node/' . $nid);
+            }
+          }
+          $list_html = theme('item_list', array('items' => $list_items));
+          $msg .= ' ' . t('Matches are found in the following content: !list-html', array('!list-html' => $list_html));
+        }
+        if (user_access('unique_field_perm_bypass')) {
+          $form_id = str_replace('_', '-', $form['#id']);
+          $msg .= '<p>' . t('Click !here to bypass this check and resubmit.', array('!here' => "<a href=\"#\" onclick=\"jQuery('form#" . $form_id . " input[name=\'unique_field_override\']').val(1);jQuery('form#" . $form_id . "').submit();return false;\">" . t('here') . '</a>')) . '</p>';
+        }
+        form_set_error($field, $msg);
+        // if checking the fields in combination, then one error message
+        // is enough for all of the fields
+        if ($comp === UNIQUE_FIELD_COMP_ALL) {
+          break;
+        }
+      }
+    }
+  }
+}
+
+/**
+ * Find nodes with a matching field value within a given scope.
+ */
+function unique_field_match_value($field, $values, $scope, $ntype = NULL, $nlanguage = NULL) {
+  // Initialize EntityFieldQuery
+  $entity_type = 'node';
+  $efq = new EntityFieldQuery();
+  $efq->entityCondition('entity_type', $entity_type);
+
+  // Add query conditions depending on the type of field
+  if ($field === UNIQUE_FIELD_FIELDS_TITLE) {
+    // Query condition for bundle title property
+    $efq->propertyCondition('title', $values);
+  }
+  elseif ($field === UNIQUE_FIELD_FIELDS_AUTHOR) {
+    // Query condition for bundle author property
+    $efq->propertyCondition('uid', $values);
+  }
+  elseif ($field === UNIQUE_FIELD_FIELDS_LANGUAGE) {
+    // Query condition for bundle language property
+    $efq->propertyCondition('language', $values);
+  }
+  else {
+    // Query condition for other fields
+    $field_info = field_info_field($field);
+    // Check all items/values
+    foreach ($values as $index => $value) {
+      // Check all columns
+      foreach ($value as $key => $val) {
+        // Skip values that are not stored in the database
+        if (!isset($field_info['columns'][$key]) || !is_array($field_info['columns'][$key])) {
+          continue;
+        }
+        // Skip if the value is an empty string or is not a scalar
+        if (!strlen($val) || !is_scalar($val)) {
+          continue;
+        }
+        $efq->fieldCondition($field, $key, $val);
+      }
+    }
+  }
+
+  // Add query conditions for the scope setting
+  if ($scope === UNIQUE_FIELD_SCOPE_TYPE && !empty($ntype)) {
+    // Query condition for the bundle (content type) scope
+    $efq->entityCondition('bundle', $ntype);
+  }
+  elseif ($scope === UNIQUE_FIELD_SCOPE_LANGUAGE && !empty($nlanguage)) {
+    // Query condition for the language scope
+    $efq->propertyCondition('language', $nlanguage);
+  }
+
+  // Execute query and collect results
+  $result = $efq->execute();
+  $nids = array();
+  if (isset($result[$entity_type]) && is_array($result[$entity_type])) {
+    foreach ($result[$entity_type] as $item) {
+      if (!empty($item->nid)) {
+        $nids[] = $item->nid;
+      }
+    }
+  }
+  return array_unique($nids);
+}
+
+/**
+ * Add the unique field settings form to content type forms (node_type_form).
+ */
+function unique_field_node_settings_form(&$form) {
+  // load fields for content type
+  $ntype = $form['#node_type']->type;
+  $nodetype = !empty($ntype) ? node_type_get_type($ntype) : FALSE;
+  $fieldopts = array();
+  $fieldopts[UNIQUE_FIELD_FIELDS_TITLE] = ($nodetype && !empty($nodetype->title_label)) ? check_plain($nodetype->title_label) . ' (' . t('title') . ')' : t('Title');
+  $fieldopts[UNIQUE_FIELD_FIELDS_AUTHOR] = t('Author');
+  if (module_exists('locale') && !empty($ntype) && variable_get('language_content_type_' . $ntype, 0)) {
+    $fieldopts[UNIQUE_FIELD_FIELDS_LANGUAGE] = t('Language');
+  }
+  if (!empty($ntype)) {
+    $fields = field_info_instances('node', $ntype);
+    foreach ($fields as $fieldname => $info) {
+      $fieldopts[$fieldname] = $info['label'] . ' (' . $fieldname . ')';
+    }
+  }
+
+  // build the form
+  $form['unique_field'] = array(
+    '#type' => 'fieldset',
+    '#title' => t('Unique Field restrictions'),
+    '#weight' => 1,
+    '#collapsible' => TRUE,
+    '#collapsed' => TRUE,
+    '#group' => 'additional_settings',
+  );
+  $form['unique_field']['unique_field_fields'] = array(
+    '#type' => 'checkboxes',
+    '#title' => t('Choose the fields that should be unique'),
+    '#options' => $fieldopts,
+    '#default_value' => !empty($ntype) ? variable_get('unique_field_fields_' . $ntype, array()) : array(),
+    '#description' => t('After designating that certain fields should be unique, users will not be able to submit the content form to create a new node or update an existing one if it contains values in the designated fields that duplicate others.'),
+  );
+  $form['unique_field']['unique_field_scope'] = array(
+    '#type' => 'radios',
+    '#title' => t('Choose the scope for the unique values'),
+    '#options' => array(
+      UNIQUE_FIELD_SCOPE_TYPE => t('Content type'),
+      UNIQUE_FIELD_SCOPE_LANGUAGE => t('Language'),
+      UNIQUE_FIELD_SCOPE_ALL => t('All nodes'),
+      UNIQUE_FIELD_SCOPE_NODE => t('Single node only'),
+    ),
+    '#default_value' => !empty($ntype) ? variable_get('unique_field_scope_' . $ntype, UNIQUE_FIELD_SCOPE_TYPE) : UNIQUE_FIELD_SCOPE_TYPE,
+    '#description' => t('Choose whether the values in the specified fields must be unique among nodes of this content type, among nodes of the same language, among all nodes, or only among the fields of the present node.'),
+  );
+  $form['unique_field']['unique_field_comp'] = array(
+    '#type' => 'radios',
+    '#title' => t('Choose whether values must be unique individually or in combination'),
+    '#options' => array(
+      UNIQUE_FIELD_COMP_EACH => t('Each of the specified fields must have a unique value'),
+      UNIQUE_FIELD_COMP_ALL => t('The combination of values from the specified fields must be unique'),
+    ),
+    '#default_value' => !empty($ntype) ? variable_get('unique_field_comp_' . $ntype, UNIQUE_FIELD_COMP_EACH) : UNIQUE_FIELD_COMP_EACH,
+    '#description' => t('For example, if you have fields for the parts of a street address (street number and name, city, and zip code) on a node, and want to allow only one node per complete address, but not only one node per city or per zip code, then you would want to choose that the fields must be unique in combination.'),
+  );
+  $form['unique_field']['unique_field_show_matches'] = array(
+    '#type' => 'checkboxes',
+    '#title' => t('Check this box to show which nodes match when duplicate values are found'),
+    '#options' => array(UNIQUE_FIELD_SHOW_MATCHES => t('Enabled')),
+    '#default_value' => !empty($ntype) ? variable_get('unique_field_show_matches_' . $ntype, array()) : array(),
+  );
+
+  // add validation function
+  $form['#validate'][] = 'unique_field_node_settings_form_validate';
+}
+
+/**
+ * Form validation callback for unique_field_node_settings_form.
+ */
+function unique_field_node_settings_form_validate($form, &$form_state) {
+  if ($form_state['values']['unique_field_scope'] === UNIQUE_FIELD_SCOPE_NODE) {
+    if ($form_state['values']['unique_field_comp'] === UNIQUE_FIELD_COMP_ALL) {
+      form_set_error('unique_field_comp', t('The scope of a single node requires that each field must be unique.'));
+    }
+    if (($form_state['values']['unique_field_fields'][UNIQUE_FIELD_FIELDS_AUTHOR] === UNIQUE_FIELD_FIELDS_AUTHOR) || (isset($form_state['values']['unique_field_fields'][UNIQUE_FIELD_FIELDS_LANGUAGE]) && $form_state['values']['unique_field_fields'][UNIQUE_FIELD_FIELDS_LANGUAGE] === UNIQUE_FIELD_FIELDS_LANGUAGE)) {
+      form_set_error('unique_field_fields', t('The author and language fields are not supported within the scope of a single node.'));
+    }
+  }
+}