How to add additional data to failed request of add action CRUD Api?

[itodor]

I'm trying to add additional data to the API response when the POST request fails.

For example, when the request is successful and I need additional data along with entity I can do something like:

$this->Crud->on('afterSave', function (Event $event) {
     $this->set('foo', 'bar');
     $this->Crud->action()->serialize(['foo']);
});

I would need the same thing with the failed request but then it seems the error response is really hardcoded, can something be done about this or am I missing something obvious?

[jippi]

According to the docs Crud.afterSave should be called both for success and failure, so it should work the same

Alternatively, you may be able to use Crud.beforeRender

[itodor]

Not really because its different code for success and failure, success callback in API listener calls this:

public function render(Subject $subject)
    {
        $this->injectViewClasses();
        $this->_ensureSuccess($subject);
        $this->_ensureData($subject);
        $this->_ensureSerialize();

        return $this->_controller()->render();
    }

(note the ensureSerialize() method), while failed success just throws exception with this method

protected function _exceptionResponse(Event $Event, $exceptionConfig)
    {
        $exceptionConfig = array_merge($this->getConfig('exception'), $exceptionConfig);

        $class = $exceptionConfig['class'];

        if ($exceptionConfig['type'] === 'validate') {
            $exception = new $class($Event->subject()->entity);
            throw $exception;
        }

        $exception = new $class($exceptionConfig['message'], $exceptionConfig['code']);
        throw $exception;
    }

But you are right about the afterSave callback part because it does trigger in both cases but doesn't help in my case.