DrupalAPI.de

1. drupal
   1. drupal6
   2. drupal7 system.api.php

Perform alterations to existing database schemas.

When a module modifies the database structure of another module (by changing, adding or removing fields, keys or indexes), it should implement hook_schema_alter() to update the default $schema to take it's changes into account.

See hook_schema() for details on the schema definition structure.

Übergabeparameter

$schema Nested array describing the schemas for all modules.

Rückgabewert

None.

Verwandte Themen

Hooks

Allow modules to interact with the Drupal core.

Code

developer-docs/hooks/core.php, line 717

<?php
function hook_schema_alter(&$schema) {
  // Add field to existing schema.
  $schema['users']['fields']['timezone_id'] = array(
    'type' => 'int',
    'not null' => TRUE,
    'default' => 0,
    'description' => 'Per-user timezone configuration.',
  );
}
?>