CakePHP submitting a form to right action

Question

I have this in add.ctp:

<!-- File: /app/views/posts/add.ctp --> 

<h1>Add Post</h1>
<?php
echo $form->create('Post');
echo $form->input('title');
echo $form->input('body', array('rows' => '3'));
echo $form->end('Save Post');
?>

and this in my controller:

function add(){
    if (!empty($this->data)) {
        if($this->Post->save($this->data)){
            $this->Session->setFlash('Your post has been saved');
            $this->redirect(array('action' => 'index'));
        }
    }
}

My question is how does CakePHP know that when the user hits submit, to send "data" to the function "add" in the controller?

Answer 1

By default CakePHP will send the form to the same action that displayed it.

You can change it in the view as follows:

echo $form->create('Post', array('action' => 'whatever'));

Answer 2

or if you want to redirect to another controller as well you can use this

echo $form->create('Post', array('url' => '/controller_name/action_name'));