materio-base-d7/sites/all/modules/contrib/fields/entityreference/patch-entityreference-7.x.patch

diff --git a/views/entityreference_plugin_display.inc b/views/entityreference_plugin_display.inc
index 1fc6450..b9a956d 100644
--- a/views/entityreference_plugin_display.inc
+++ b/views/entityreference_plugin_display.inc
@@ -76,7 +76,12 @@
       foreach ($style_options['search_fields'] as $field_alias) {
         if (!empty($field_alias)) {
           // Get the table and field names for the checked field
-          $field = $this->view->query->fields[$this->view->field[$field_alias]->field_alias];
+          if (empty($this->view->field[$field_alias]->field_info)) 
+            $field = $this->view->query->fields[$this->view->field[$field_alias]->field_alias];
+          else {
+            $this->view->query->add_field($this->view->field[$field_alias]->options['table'], $this->view->field[$field_alias]->real_field, $this->view->field[$field_alias]->options['field'], array());
+            $field = $this->view->query->fields[$this->view->field[$field_alias]->options['field']];
+          }
           // Add an OR condition for the field
           $conditions->condition($field['table'] . '.' . $field['field'], $value, 'LIKE');
         }