Left join with propel 2.0
<p>I have to do this query with propel's code:</p>

<pre><code>$sql = "SELECT dt.id_ditta,dt.rag_soc as nome_pagina
                            FROM utente_ditte ud    
                            LEFT JOIN ditte dt 
                            ON  ud.id_ditte  = dt.id_ditta 
                            WHERE ud.id_users=:user";
                $stmt = $con-&gt;prepare($sql);
                $stmt-&gt;execute(array(':user' =&gt; $_SESSION['id_user']));
                $results = $stmt-&gt;fetchAll(PDO::FETCH_ASSOC);
</code></pre>

<p>Now I do with custom query, but I want to improve it,
I have seen that I can use <code>-&gt;leftJOIN()</code> but i don't know to apply it.
<strong><em>How i can do this?</em></strong></p>

<p>Sorry if my question is with few details, i'm newbie.</p>