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copied!<p>@florian gave you the correct answer but let me try to explain it on example:</p> <p>In sql, joins are done like this:</p> <pre><code>SELECT * FROM category LEFT JOIN product ON product.category_id = category.id </code></pre> <p>(or something like this)</p> <p>Now in Doctrine, you don't need to use <code>ON</code> clause because doctrine knows that from relations annotations in your entities. So above example would be:</p> <pre><code>// CategoryRepository.php public function getCategoriesAndJoinProducts() { return $this->createQueryBuilder("o") ->leftJoin("o.products", "p")->addSelect("p") ->getQuery()->getResult() ; } </code></pre> <p>Both would fetch all categories and join products associated with them.</p> <p>Now comes the <code>WITH</code> clause. If you want to join only products with price bigger than 50, you would do this in SQL:</p> <pre><code>SELECT * FROM category LEFT JOIN product ON product.category_id = category.id AND product.price>50 </code></pre> <p>In Doctrine:</p> <pre><code>// CategoryRepository.php public function getCategoriesAndJoinProductsWithPriceBiggerThan($price) { return $this->createQueryBuilder("o") ->leftJoin("o.products", "p", "WITH", "p.price>:price") ->setParameter("price", price)->addSelect("p") ->getQuery()->getResult() ; } </code></pre> <p>So, in reality you should never, ever use <code>ON</code> if you are using Doctrine. If you have a need for something like that, you can be almost sure that you screwed something else.</p>

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