function field_attach_update

Save field data for an existing entity.

When calling this function outside an entity save operation be sure to clear caches for the entity:

entity_get_controller($entity_type)->resetCache(array(
    $entity_id,
));

Parameters

$entity_type: The type of $entity; e.g. 'node' or 'user'.

$entity: The entity with fields to save.

Related topics

File

modules/field/field.attach.inc, line 990

Code

function field_attach_update($entity_type, $entity) {
    _field_invoke('update', $entity_type, $entity);
    list($id, $vid, $bundle) = entity_extract_ids($entity_type, $entity);
    // Let any module update field data before the storage engine, accumulating
    // saved fields along the way.
    $skip_fields = array();
    foreach (module_implements('field_storage_pre_update') as $module) {
        $function = $module . '_field_storage_pre_update';
        $function($entity_type, $entity, $skip_fields);
    }
    // Collect the storage backends used by the remaining fields in the entities.
    $storages = array();
    foreach (field_info_instances($entity_type, $bundle) as $instance) {
        $field = field_info_field_by_id($instance['field_id']);
        $field_id = $field['id'];
        $field_name = $field['field_name'];
        // Leave the field untouched if $entity comes with no $field_name property,
        // but empty the field if it comes as a NULL value or an empty array.
        // Function property_exists() is slower, so we catch the more frequent
        // cases where it's an empty array with the faster isset().
        if (isset($entity->{$field_name}) || property_exists($entity, $field_name)) {
            // Collect the storage backend if the field has not been written yet.
            if (!isset($skip_fields[$field_id])) {
                $storages[$field['storage']['type']][$field_id] = $field_id;
            }
        }
    }
    // Field storage backends save any remaining unsaved fields.
    foreach ($storages as $storage => $fields) {
        $storage_info = field_info_storage_types($storage);
        module_invoke($storage_info['module'], 'field_storage_write', $entity_type, $entity, FIELD_STORAGE_UPDATE, $fields);
    }
    // Let other modules act on updating the entity.
    module_invoke_all('field_attach_update', $entity_type, $entity);
    $entity_info = entity_get_info($entity_type);
    if ($entity_info['field cache']) {
        cache_clear_all("field:{$entity_type}:{$id}", 'cache_field');
    }
}