jquery post & ci form validation

[eluser]Nick Husher[/eluser]
It's maybe slightly bad practice, but you'll need to use a custom validation rule that's described about halfway down the Form Validation page. In the controller method you're using to decode the ajax request, add this validation rule:

Code:

$this->form_validation->set_rules('a','JSON Object','required|callback__handle_object');

And in the same controller, add this function:

Code:

function _handle_object($json_object) {
    $json_object = json_decode($json_object);

    // json_decode returns null or a string if the json given to it is
    // invalid. see:
    // http://us2.php.net/manual/en/function.json-decode.php#86181
    $isValid = ($json_object != null && !is_string($json_object));
        
    // run validation, setting $isValid to false if anything
    // is out of place.
    return $isValid;
}

This code is untested, so it might need some massaging.