1 field.api.php hook_field_storage_delete_field($field)

Act on deletion of a field.

This hook is invoked from field_delete_field() to ask the field storage module to mark all information stored in the field for deletion.

Parameters

$field: The field being deleted.

Related topics

Field Storage API Implement a storage engine for Field API data. Hooks Allow modules to interact with the Backdrop core.

File

core/modules/field/field.api.php, line 2182
Hooks provided by the Field module.

Code

function hook_field_storage_delete_field($field) {
  // Mark all data associated with the field for deletion.
  $field['deleted'] = 0;
  $table = _field_sql_storage_tablename($field);
  $revision_table = _field_sql_storage_revision_tablename($field);
  db_update($table)
    ->fields(array('deleted' => 1))
    ->execute();

  // Move the table to a unique name while the table contents are being deleted.
  $field['deleted'] = 1;
  $new_table = _field_sql_storage_tablename($field);
  $revision_new_table = _field_sql_storage_revision_tablename($field);
  db_rename_table($table, $new_table);
  db_rename_table($revision_table, $revision_new_table);
  backdrop_get_schema(NULL, TRUE);
}