title: How to pass a parameter to relational query in Yii
body: <p>I have a MANY_MANY relation:  </p>
  
  <pre><code>'rel'=&gt;array(self::MANY_MANY, 'MyClass','table(id_1,id_2)',  
               'condition'=&gt;'some condiotions AND field_name=:param')
  </code></pre>
  
  <p>I get the result -instances of Myclass in the siteController:  </p>
  
  <pre><code>$obj-&gt;rel
  </code></pre>
  
  <p>Is it possible (and how) to pass the :param from the controller to the relation's query?</p>