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- /**
- * 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
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