function entityreference_field_schema in Entity reference 7
Same name and namespace in other branches
- 8 entityreference.install \entityreference_field_schema()
Implements hook_field_schema().
File
- ./
entityreference.install, line 13
Code
function entityreference_field_schema($field) {
if ($field['type'] == 'entityreference') {
// Load the base table configuration from the cache.
$base_tables = variable_get('entityreference:base-tables', array());
$schema = array(
'columns' => array(
'target_id' => array(
'description' => 'The id of the target entity.',
'type' => 'int',
'unsigned' => TRUE,
'not null' => TRUE,
),
),
'indexes' => array(
'target_id' => array(
'target_id',
),
),
'foreign keys' => array(),
);
// Create a foreign key to the target entity type base type, if available.
$entity_type = $field['settings']['target_type'];
if (isset($base_tables[$entity_type])) {
list($base_table, $id_column) = $base_tables[$entity_type];
$schema['foreign keys'][$base_table] = array(
'table' => $base_table,
'columns' => array(
'target_id' => $id_column,
),
);
}
// Invoke the behaviors to allow them to change the schema.
module_load_include('module', 'entityreference');
foreach (entityreference_get_behavior_handlers($field) as $handler) {
$handler
->schema_alter($schema, $field);
}
return $schema;
}
}