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Issue #911352 by Liam Morland, Sylvain Lecoy, Joe Murray, Crell: Document that foreign keys may not be used by all drivers

merge-requests/26/head
David Rothstein 2015-10-14 18:29:54 -04:00
parent 7ec991628c
commit 5d6340b7e3
2 changed files with 9 additions and 2 deletions
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5
includes/database/schema.inc
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@ -92,7 +92,8 @@ require_once dirname(__FILE__) . '/query.inc';
* specification). Each specification is an array containing the name of * specification). Each specification is an array containing the name of
* the referenced table ('table'), and an array of column mappings * the referenced table ('table'), and an array of column mappings
* ('columns'). Column mappings are defined by key pairs ('source_column' => * ('columns'). Column mappings are defined by key pairs ('source_column' =>
* 'referenced_column'). * 'referenced_column'). This key is for documentation purposes only; foreign
* keys are not created in the database, nor are they enforced by Drupal.
* - 'indexes': An associative array of indexes ('indexname' => * - 'indexes': An associative array of indexes ('indexname' =>
* specification). Each specification is an array of one or more * specification). Each specification is an array of one or more
* key column specifiers (see below) that form an index on the * key column specifiers (see below) that form an index on the
@ -144,6 +145,8 @@ require_once dirname(__FILE__) . '/query.inc';
* 'unique keys' => array( * 'unique keys' => array(
* 'vid' => array('vid'), * 'vid' => array('vid'),
* ), * ),
* // For documentation purposes only; foreign keys are not created in the
* // database.
* 'foreign keys' => array( * 'foreign keys' => array(
* 'node_revision' => array( * 'node_revision' => array(
* 'table' => 'node_revision', * 'table' => 'node_revision',

6
modules/system/system.api.php
View File

@ -3175,7 +3175,9 @@ function hook_requirements($phase) {
* creation and alteration of the supported database engines. * creation and alteration of the supported database engines.
* *
* See the Schema API Handbook at http://drupal.org/node/146843 for details on * 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 * @return array
* A schema definition structure array. For each element of the * A schema definition structure array. For each element of the
@ -3227,6 +3229,8 @@ function hook_schema() {
'nid_vid' => array('nid', 'vid'), 'nid_vid' => array('nid', 'vid'),
'vid' => array('vid'), 'vid' => array('vid'),
), ),
// For documentation purposes only; foreign keys are not created in the
// database.
'foreign keys' => array( 'foreign keys' => array(
'node_revision' => array( 'node_revision' => array(
'table' => 'node_revision', 'table' => 'node_revision',