Use the php function json_encode( ).

http://php.net/manual/en/function.json-encode.php

You can generate an associative array with the message you want, and use:

return json_encode($your_array);

Wladimir Chópite
+584249700264
ve.linkedin.com/in/wchopite
"Mejor pirata de la armada". Hack the planet!
El 13/03/2014 06:45, "Sam" <[email protected]> escribió:

> I have a controller which takes in an id and checks whether this id exists
> inside the Model. If it does not exist, I would like the controller to
> return a validation error message "id not found" in json when it returns
> the HTTP response. This controller takes in a normal HTTP POST which is not
> in json.
>
> How can this be done in Cakephp 2.4.5?
>
> My controller code looks something like this;
>
> public function controller_function($id=null){
>     if ($this->request->is('post'))
>     {
>        $field=$this->request->data['Model']['field'];
>        $Model_id = $this->Model->findFieldID($field);
>        if (empty($Model_id) ) //record not found. Return validation error
>        {
>            //Send validation error back in JSON. How??
>        }
>     }}
>
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