Cakephp HABTM join table empty

Question

I'm following a tutorial for an application where users may upload files and files belong to a particular user. There's a HABTM relationship between Users and Uploads as follows:

Upload.php:

var $hasAndBelongsToMany = array(
    'SharedUser' => array(
        'className' => 'User',
        'joinTable' => 'uploads_users',
        'foreignKey' => 'upload_id',
        'associationForeignKey' => 'user_id',
        'unique' => 'keepExisting'
    )
);

User.php:

var $hasMany = array(
    'Upload' => array(
        'className' => 'Upload',
        'foreignKey' => 'user_id',
        'dependent' => false
    )
);

var $hasAndBelongsToMany = array(
    'SharedUpload' => array(
        'className' => 'Upload',
        'joinTable' => 'uploads_users',
        'foreignKey' => 'user_id',
        'associationForeignKey' => 'upload_id',
        'unique' => true
    )
);

All seems to work as it should with one exception, which is that on creating a new Upload the uploads_users table is not updated. If I insert data into it manually then the views which are meant to find and display data using it function. Can anyone suggest what is wrong?

Here's the uploads_users table:

+-----------+----------+------+-----+---------+----------------+
| Field     | Type     | Null | Key | Default | Extra          |
+-----------+----------+------+-----+---------+----------------+
| id        | int(11)  | NO   | PRI | NULL    | auto_increment |
| upload_id | char(36) | NO   |     | NULL    |                |
| user_id   | char(36) | NO   |     | NULL    |                |
+-----------+----------+------+-----+---------+----------------+

I've altered the add Upload method a little from the tutorial (so it deletes an uploaded file if the database save fails), so here's that as well:

function add() {
  if (!empty($this->data)) {
    $this->Upload->create();
    if ($this->uploadFile()) {
      try {
        if (!$this->Upload->saveAll($this->request->data)) {
          throw new Exception('Couldn't save to database.');
        }
        $this->Session->setFlash(__('The upload has been saved', true));
        $this->redirect(array('action' => 'index'));
      }
      catch (Exception $e) {
        unlink(APP . 'tmp/uploads/' . $this->request->data['Upload']['id']);
        $this->Session->setFlash(__('The upload could not be saved: ' . $e->getMessage(), true));
      }
    } else {
      $this->Session->setFlash(__('The upload could not be saved.', true));
    }
  }
  $users = $this->Upload->User->find('list');
  $this->set(compact('users', 'users'));
}

function uploadFile() {
  $file = $this->data['Upload']['file'];
  if ($file['error'] === UPLOAD_ERR_OK) {
    $id = String::uuid();
    if (move_uploaded_file($file['tmp_name'], APP.'tmp/uploads'.DS.$id)) {
      $this->request->data['Upload']['id'] = $id;
      $this->request->data['Upload']['user_id'] = $this->Auth->user('id');
      $this->request->data['Upload']['filename'] = $file['name'];
      $this->request->data['Upload']['filesize'] = $file['size'];
      $this->request->data['Upload']['filemime'] = $file['type'];
      return true;
    }
  }
  return false;
}

Zeal Zeal · Accepted Answer · 2013-01-09T17:51:33

It would be usefull to see what else is in your request->data. As written in cookbook you should use the related model structure.

It should look the following:

$this->request->data['Upload']['id'] = $id;
$this->request->data['Upload']['user_id'] = $this->Auth->user('id');
...
$this->request->data['SharedUser']['id'] = $this->Auth->user('id');

Also I could not see your belongsTo relation shown in your method "uploadFile". Maybe you don't need it in the "Upload" model.

Cakephp HABTM join table empty

1 Answers