Saving HABTM erases existing records...

Hello,

I currently having a problem achieving a follower system with HABTM.

In a word, my relationships seem to be well set up :

User HABTM Follower , and in my join table (users_uers) I have the tables  ID (auto increment) user_id and follower_id

I have a button "follow this user" :

<!--Follow-->

<?php 

echo $this->Form->create('User', array(

'action' => 'follow',

));

echo $this->Form->input('id', array(

'type' => 'hidden',

'value' => $user['User']['id'],

));

echo ("<input type='submit' class='btn btn-primary' value='Follow'>"); ?></td>

</form><!--End form-->

With this in the controller :

public function follow() {

        $this->User->set($this->data);

        if ($this->request->is('post')) {

        $this->request->data['Follower']['follower_id'] = $this->Auth->user('id');

        $this->User->save($this->request->data);

        $this->Session->setFlash(__('You are now following this user.'));

        $this->redirect(array('controller' => 'users', 'action' => 'index'));

        }

    }

I tough this would work ace, and it semmly did, but I have since understood that when saving a new relationship, Cake erases all previous existing one...

So if 1 followed by 3, when 3 follows 1 it erases the previous relation... In a word, it cannot work properly for a follower system.

I tough that adding the auto increment ID colums would prevent this, but I was wrong... so how can I save HABTM NEX relationships without erasing previous ones ? Is there a better solution for a follower system ? Thanks a lot.

 

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