title: Using $this in Zend Model
body: <p>I'm trying to write <code>getFunction()</code> in my Zend Model</p>
  
  <p>Only works:</p>
  
  <pre><code>public function getFunction($id){
      $Wiadomosc = new Application_Model_DbTable_Wiadomosc();
      $nieodczytane = $Wiadomosc-&gt;select();
      $nieodczytane-&gt;from(etc.....)
  }
  </code></pre>
  
  <p>But i don't want to create object model in model!</p>
  
  <p>I would like to do it in that way:</p>
  
  <pre><code>public function getFunction($id){
      $nieodczytane = $this-&gt;select();
      $nieodczytane-&gt;from(etc.....)
  }
  </code></pre>
  
  <p>but..<br>
  <code>Method "select" does not exist and was not trapped in __call()</code></p>
  
  <p>how to do it?</p>