Cakephp Model association with user id - php

Question

I have the following model in Cakephp:
class Post extends AppModel {
var $name = 'Post';
var $belongsTo = array(
"User" => array(
'className' => 'User',
'foreignKey' => 'user',
'fields'=>array('id', 'username', 'last_action', 'type', 'status', 'country')
),
);
var $hasOne = array(
"Follower" => array(
'className' => 'Follower',
'foreignKey' => false,
'fields'=>'target',
'conditions' => array('Follower.target = Post.user', 'Follower.user = 21')
),
);
}
This model gets the posts from the database and includes the basic user information. My goal is to include in the same query if the user who is retrieving the data is following or not whoever created that post.
For this reason I am trying to associate the table followers. But in order to get the appropriate result I should submit the user id, (in this case 21). The problem is that I don't know how to pass the logged user ID variable.
Does anybody know how to do it or how this model should be written?
Thanks

Answer 1

Remove the $hasOne code within the Post model. Immediately before executing your find, use the bindModel
For example, this would be called from a method within the Post model (changing the 21 to your logged in user's id) prior to the find:
$this->bindModel(
array('hasOne'=>array(
'Follower' => array(
'className' => 'Follower',
'foreignKey' => false,
'fields'=>'target',
'conditions' => array(
'Follower.target' => 'Post.user',
'Follower.user' => '21')
)
))
);