Add QueryBuilder vs DQL section

bocharsky-bw · bocharsky-bw · commit 122290da74e3 · 2015-08-19T22:36:22.000+03:00
Describe difference between QueryBuilder and DQL usage
diff --git a/book/doctrine.rst b/book/doctrine.rst
@@ -791,6 +791,14 @@ normal ``Query`` object, which can be used to get the result of the query.
 For more information on Doctrine's Query Builder, consult Doctrine's
 `Query Builder`_ documentation.
 
+Query Builder vs DQL
+~~~~~~~~~~~~~~~~~~~~
+
+When the actual query depends on dynamic conditions, your code soon becomes hard
+to read as you start to concatenate strings. In these cases, it's better to use
+the Doctrine QueryBuilder which provides a fluent interface to dynamically add
+every part of the query.
+
 .. _book-doctrine-custom-repository-classes:
 
 Custom Repository Classes
