excerpt.php

<?php
//...snip
$q = Doctrine_Query::create()->from('Post p, p.Comments c')->select('p.*, c.*, COUNT(c.id) AS comment_count')->having('comment_count <= p.max_comments');
$q->getSql(); //produces '... HAVING a2__0 <= p.max_comments ...'
//instead of '... HAVING a2__0 <= a__max_comments ...'

schema.yml

Post:
  columns:
    content: string(1000)
    max_comments: integer
  relation:
    Comments:
      class: Comment
      local: id
      foreign: post_id

Comment:
  columns:
    post_id:  integer
    content:  string(100)