title: Null Safe Operator for Cakephp Find Condition
body: <p>I'm trying to find an item that has a field that is not equal to another field on CakePHP.</p>
  
  <p>What I'm trying to do (doesn't work, it still shows the item that is equal to another) :</p>
  
  <pre><code>array(
      'conditions' =&gt; array(
          'NOT' =&gt; array(
              array('fieldA' =&gt; null),
              array('fieldA' =&gt; 'fieldB')
          )
      )
  );
  </code></pre>
  
  <p>Basically, I need to figure out how to use the <a href="https://stackoverflow.com/questions/3825237/mysql-select-rows-where-two-columns-do-not-have-the-same-value">MySQL &lt;=> (NULL-safe equal to operator)</a> on CakePHP's ORM.</p>
  
  <p>It's not as obvious as the following:</p>
  
  <pre><code>array(
      'conditions' =&gt; array(
          'NOT' =&gt; array(
              array('fieldA &lt;=&gt;' =&gt; 'fieldB')
          )
      )
  );
  </code></pre>
  
  <p>The above does not work for me :(.</p>