Cakephp 3 callbacks, behaviors for all models

问题

I just started reading cakephp 3 docs (I have been developing with cake 2.x for some time) and want to migrate some website from 2.x to 3. In cake 2 in my AppModel I have some callbacks, particularly beforeFind and beforeSave, that contain some logic concerning almost all tables in a database.

Now in cake 3 there is no AppModel, how do I get the same thing done ? The best I can think of is to put that code in some behavior's callbacks, but I have like 30 models, should I load the behavior in all models one by one ?

Thanks

回答1:

Use an event listener that listens to the events Model.beforeSave, Model.beforeFind and Model.initialize and apply whatever you want to do there. Read the chapter about events and the documentation for table callbacks.

use Cake\Event\EventListenerInterface;
use Cake\Event\Event;

class SomeListener implements EventListenerInterface
{

    public function implementedEvents()
    {
        return [
            'Model.beforeFind' => 'beforeFind',
        ];
    }

    public function beforeFind(Event $event, Query $query, ArrayObject $options, boolean $primary)
    {
        // Your code here
    }
}

And attach it to the global event manager. It will now listen to the callbacks of all table object.

回答2:

You can also create an AppTable in your src/Model/Table Folder:

namespace App\Model\Table;

use Cake\ORM\Table;

class AppTable extends Table
{
    public function initialize(array $config)
    {
        parent::initialize($config);

        $this->addBehavior('myBehavior');
        $this->addBehavior('myBehavior2');
        $this->addBehavior('myBehavior3');
    }
}

And then extends your Table class by AppTable:

namespace App\Model\Table;

use App\Model\Table\AppTable;

class ArticlesTable extends AppTable
{

}

来源：https://stackoverflow.com/questions/33223710/cakephp-3-callbacks-behaviors-for-all-models