function field_purge_field

Purges a field record from the database.

This function assumes all instances for the field has already been purged, and should only be called by field_purge_batch().

Parameters

$field: The field record to purge.

Related topics

File

modules/field/field.crud.inc, line 989

Code

function field_purge_field($field) {
    $instances = field_read_instances(array(
        'field_id' => $field['id'],
    ), array(
        'include_deleted' => 1,
    ));
    if (count($instances) > 0) {
        throw new FieldException(t('Attempt to purge a field @field_name that still has instances.', array(
            '@field_name' => $field['field_name'],
        )));
    }
    db_delete('field_config')->condition('id', $field['id'])
        ->execute();
    // Notify the storage engine.
    module_invoke($field['storage']['module'], 'field_storage_purge_field', $field);
    // Clear the cache.
    field_info_cache_clear();
    // Invoke external hooks after the cache is cleared for API consistency.
    module_invoke_all('field_purge_field', $field);
}