Serialize objects

[cuyogomez]

Hi people. i have a problem... I have a Brand Object with name and id attributes. Then i have a Car with name, color, and foreign key to Brand Object. I need to return a JSON response with a list of Brands and foreach brand display all the cars, but when i do that, my response is [ { id:"1", name:"Ford", cars: [ {Car object}, {Car object} ] } ]

So, the Car object isn't serialized... how can i do that??? Please is urgent!!