1 field.attach.inc | _field_invoke($op, $entity_type, $entity, &$a = NULL, &$b = NULL, $options = array()) |
Invoke a field hook.
Parameters
$op: Possible operations include:
- form
- validate
- presave
- insert
- update
- delete
- delete revision
- view
- prepare translation
$entity_type: The type of $entity; e.g. 'node' or 'user'.
$entity: The fully formed $entity_type entity.
$a:
- The $form in the 'form' operation.
- The value of $view_mode in the 'view' operation.
- Otherwise NULL.
$b:
- The $form_state in the 'submit' operation.
- Otherwise NULL.
$options: An associative array of additional options, with the following keys:
- 'field_name': The name of the field whose operation should be invoked. By default, the operation is invoked on all the fields in the entity's bundle.
- 'default': A boolean value, specifying which implementation of
the operation should be invoked.
- if FALSE (default), the field types implementation of the operation will be invoked (hook_field_[op])
- If TRUE, the default field implementation of the field operation will be invoked (field_default_[op])
Internal use only. Do not explicitly set to TRUE, but use _field_invoke_default() instead.
- 'deleted': If TRUE, the function will operate on deleted fields as well as non-deleted fields. If unset or FALSE, only non-deleted fields are operated on.
- 'language': A language code or an array of language codes keyed by field name. It will be used to narrow down to a single value the available languages to act on.
Related topics
File
- core/
modules/ field/ field.attach.inc, line 152 - Field attach API, allowing entities (nodes, users, ...) to be 'fieldable'.
Code
function _field_invoke($op, $entity_type, $entity, &$a = NULL, &$b = NULL, $options = array()) {
// Merge default options.
$default_options = array(
'default' => FALSE,
'deleted' => FALSE,
'language' => NULL,
);
$options += $default_options;
// Determine the list of instances to iterate on.
list(, , $bundle) = entity_extract_ids($entity_type, $entity);
$instances = _field_invoke_get_instances($entity_type, $bundle, $options);
// Iterate through the instances and collect results.
$return = array();
foreach ($instances as $instance) {
$field = field_info_field($instance['field_name']);
$field_name = $field['field_name'];
$function = $options['default'] ? 'field_default_' . $op : $field['module'] . '_field_' . $op;
if (function_exists($function)) {
// Determine the list of languages to iterate on.
$available_languages = field_available_languages($entity_type, $field);
$languages = _field_language_suggestion($available_languages, $options['language'], $field_name);
foreach ($languages as $langcode) {
$items = isset($entity->{$field_name}[$langcode]) ? $entity->{$field_name}[$langcode] : array();
$result = $function($entity_type, $entity, $field, $instance, $langcode, $items, $a, $b);
if (isset($result)) {
// For hooks with array results, we merge results together.
// For hooks with scalar results, we collect results in an array.
if (is_array($result)) {
$return = array_merge($return, $result);
}
else {
$return[] = $result;
}
}
// Populate $items back in the field values, but avoid replacing missing
// fields with an empty array (those are not equivalent on update).
if ($items !== array() || isset($entity->{$field_name}[$langcode])) {
$entity->{$field_name}[$langcode] = $items;
}
}
}
}
return $return;
}