作者:老葛,北京亚艾元软件有限责任公司,http://www.yaiyuan.com
再来看module文件,不足100行的代码:
/**
* Implements hook_field_attach_validate().
*/
function field_validation_field_attach_validate($entity_type, $entity, &$errors) {
list($id, $vid, $bundle) = entity_extract_ids($entity_type, $entity);
//Using ctools to get validation rules of this bundle.
ctools_include('export');
$rules = ctools_export_load_object('field_validation_rule', 'conditions', array('entity_type' => $entity_type, 'bundle' => $bundle));
if($rules){
foreach ($rules as $rule) {
//Disabled by Ctools.
if(!empty($rule->disabled)){
continue;
}
ctools_include('plugins');
$plugin = ctools_get_plugins('field_validation', 'validator', $rule->validator);
$class = ctools_plugin_get_class($plugin, 'handler');
if(empty($class)){
continue;
}
if (!is_subclass_of($rule->validator, 'field_validation_validator')) {
drupal_set_message(t("Plugin '@validator' should extends 'field_validation_validator'.", array('@validator' => $rule->validator)));
continue;
}
$field_name = $rule->field_name;
$field = field_info_field($field_name);
$instance = field_info_instance($entity_type, $field_name, $bundle);
$languages = field_available_languages($entity_type, $field);
foreach ($languages as $langcode) {
//debug($errors);
$items = isset($entity->{$field_name}[$langcode]) ? $entity->{$field_name}[$langcode] : array();
//print debug($rule);
foreach($items as $delta => $item){
$validator = new $class($entity_type, $entity, $field, $instance, $langcode, $items, $delta, $item, $rule, $errors);
$break = $validator->validate();
if(!empty($break)){
break;
}
}
}
}
}
}
/**
* Implements hook_field_delete().
*/
function field_validation_field_delete($entity_type, $entity, $field, $instance, $langcode, &$items) {
//$rules = field_validation_get_field_rules($instance);
$rules = array();
if ($rules) {
foreach (array_keys($rules) as $ruleid) {
db_delete('field_validation_rule')->condition('ruleid', $ruleid)->execute();
}
}
}
/**
* Implements hook_ctools_plugin_type().
*
*/
function field_validation_ctools_plugin_type() {
return array(
'validator' => array(
'use hooks' => FALSE,
),
);
}
/**
* Implementation of hook_ctools_plugin_directory().
*/
function field_validation_ctools_plugin_directory($module, $plugin) {
if ($module == 'field_validation' && $plugin == 'validator') {
return 'plugins/' . $plugin;
}
}
/**
* Implementation of hook_ctools_plugin_api().
*
* Tell Ctools that we support the default_field_validation_rules API.
*/
function field_validation_ctools_plugin_api($owner, $api) {
if ($owner == 'field_validation' && $api == 'default_field_validation_rules') {
return array('version' => 2);
}
}
写的非常的简洁,另外,在后面的版本,我删除了field_validation_field_delete这个钩子函数,由于我们的验证规则,不仅仅存放在数据库里面了,所以这个钩子实现变得有些多余。
这里我们使用field_validation_ctools_plugin_type,定义了一种新的插件类型validator,这里'use hooks'设置为了FALSE,我通常喜欢使用这种方式,我们这里是不允许通过钩子的形式定义插件;不过在Feeds模块里面,就是使用的钩子形式,但是在很多其它的模块里面,都不使用这个方式;使用field_validation_ctools_plugin_directory定义了插件所在的目录,这里是plugins\validator目录。