diff options
Diffstat (limited to 'modules/system/system.api.php')
| -rw-r--r-- | modules/system/system.api.php | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/modules/system/system.api.php b/modules/system/system.api.php index 3f61cc0e8..4576f8197 100644 --- a/modules/system/system.api.php +++ b/modules/system/system.api.php @@ -3175,7 +3175,9 @@ function hook_requirements($phase) { * creation and alteration of the supported database engines. * * See the Schema API Handbook at http://drupal.org/node/146843 for details on - * schema definition structures. + * schema definition structures. Note that foreign key definitions are for + * documentation purposes only; foreign keys are not created in the database, + * nor are they enforced by Drupal. * * @return array * A schema definition structure array. For each element of the @@ -3227,6 +3229,8 @@ function hook_schema() { 'nid_vid' => array('nid', 'vid'), 'vid' => array('vid'), ), + // For documentation purposes only; foreign keys are not created in the + // database. 'foreign keys' => array( 'node_revision' => array( 'table' => 'node_revision', |