title: How can I do set NULL into the table in Doctrine
body: <p>I have some table <code>store_section</code>(<code>id</code>,<code>parent_id</code>,<code>label</code>), I want to change some row, set parent_id=null.</p>
  
  <p>I trying to:</p>
  
  <pre><code>$record = $table-&gt;getTable()-&gt;find( $id );
  $record-&gt;parent_id = null;
  $record-&gt;save();
  </code></pre>
  
  <p>But this isn't work. How can I do set NULL into the table in Doctrine, in example above, parent_id becomes =0 (not =NULL)?</p>
  
  <p>Thnx for the responses!</p>