function field_update_instance

field_update_instance($instance)

Updates an instance of a field.

Parameters

$instance: An associative array representing an instance structure. The following required array elements specify which field instance is being updated:

• entity_type: The type of the entity the field is attached to.
• bundle: The bundle this field belongs to.
• field_name: The name of an existing field.

The other array elements represent properties of the instance, and all properties must be specified or their default values will be used (except internal-use properties, which are assigned automatically). To avoid losing the previously stored properties of the instance when making a change, first load the instance with field_info_instance(), then override the values you want to override, and finally save using this function. Example:

  // Fetch an instance info array.
  $instance_info = field_info_instance($entity_type, $field_name, $bundle_name);
  // Change a single property in the instance definition.
  $instance_info['required'] = TRUE;
  // Write the changed definition back.
  field_update_instance($instance_info);
  

Throws

FieldException

See also

field_info_instance()

field_create_instance()

Related topics

File

modules/field/field.crud.inc, line 553

Field CRUD API, handling field and field instance creation and deletion.

Code

function field_update_instance($instance) {
  // Check that the specified field exists.
  $field = field_read_field($instance['field_name']);
  if (empty($field)) {
    throw new FieldException(t('Attempt to update an instance of a nonexistent field @field.', array('@field' => $instance['field_name'])));
  }

  // Check that the field instance exists (even if it is inactive, since we
  // want to be able to replace inactive widgets with new ones).
  $prior_instance = field_read_instance($instance['entity_type'], $instance['field_name'], $instance['bundle'], array('include_inactive' => TRUE));
  if (empty($prior_instance)) {
    throw new FieldException(t("Attempt to update an instance of field @field on bundle @bundle that doesn't exist.", array('@field' => $instance['field_name'], '@bundle' => $instance['bundle'])));
  }

  $instance['id'] = $prior_instance['id'];
  $instance['field_id'] = $prior_instance['field_id'];

  _field_write_instance($instance, TRUE);

  // Clear caches.
  field_cache_clear();

  module_invoke_all('field_update_instance', $instance, $prior_instance);
}