title: Rails ActiveRecord :joins with LEFT JOIN instead of INNER JOIN
body: <p>I have this code</p>
  
  <pre><code>User.find(:all, :limit =&gt; 10, :joins =&gt; :user_points,
                  :select =&gt; "users.*, count(user_points.id)", :group =&gt;
                  "user_points.user_id")
  </code></pre>
  
  <p>which generates following sql</p>
  
  <pre><code>SELECT users.*, count(user_points.id) 
  FROM `users` 
  INNER JOIN `user_points` 
  ON user_points.user_id = users.id 
  GROUP BY user_points.user_id 
  LIMIT 10
  </code></pre>
  
  <p>is it possible to make LEFT JOIN instead of INNER JOIN other way than <code>User.find_by_sql</code> and manualy typing the query?</p>