CODEWITHSUNDEEP
cakephpauthenticationhas-and-belongs-to-many
Grambot
Grambot

Reputation: 4524

User permissions from HABTM relationship

I have a 'User' model which is related to a 'Group' model via HABTM relationship. I am able to query the model to determine which memberships the authenticated user belongs to but am unable to conceptually come up with a method of easily accessing that data on a page's isAuthorized() function call.

Ideally I'm hoping there's a way I can link into the authentication method and cache the authorized user's group memberships so I can do a quick lookup on isAuthorized() calls. Is there some functionality in cake that would allow this? I'm obviously open to recommendations as I am fairly new to the framework after inheriting this project from a past employee.

From what I've been able to gather is that I would want to be able to access or search the group memberships of the user returned by AuthComponent::user() but since that's a static method I don't get access to its Model. Is this possible?

EDIT: Solution was a mixture of the discussion I had with ndm as well as finding out that the application seemed to break authentication. This might be the fault of the last dev who created the application but I managed to resolve it by overriding part of the BaseAuthenticate._findUser($username,$password) function to inherit the 'Group' Array along with the 'User' array. It was being fetched on login but only the 'User' portion of the model returned back to the Controller that called Auth.

Upvotes: 1

Views: 328

Answers (1)

ndm
ndm

Reputation: 60463

Retreiving the groups of the currently logged in user should be simple, you'd just need to configure your authentication handler appropriately so that it fetches the associated models. This can be done using the resurive or contain setting, though the latter seems to be kinda broken currently (at least the behaviour is unexpected).

Example using recursive:

$this->Auth->authenticate = array
(
    'Form' => array
    (
        'userModel' => 'User',
        'recursive' => 1
    )
);

Example using contain:

$this->Auth->authenticate = array
(
    'Form' => array
    (
        'userModel' => 'User',
        'contain' => array('Group')
    )
);

In order for the contain method to work, the User model needs to act as Containable! However, as mentioned, this seems to be broken, because recursive is always used, and it's not possible to set it to null because it's being casted to an integer. So you'd need to supply the appropriate recursive setting too (ie recursive = 1), however this somehow defeats the purpose of the Containable behaviour which should figure out the appropriate recursive setting automatically (unless configured otherwise).

Anyway, both would make the authenticator fetch your User HABTM Group association. Either way you should then be able to access the data via AuthComponent::user() from anywhere you want:

$currentUser = AuthComponent::user();
pr($currentUser['Group']);

Edit (07.11.2012): The problem with using contain in the authentication handler configuration is now fixed for 2.2.4, making it possible to pass null for the recursive setting.

Upvotes: 3

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