QueryBuilder is an object designed to help build the DQL queries through a PHP API with a fluent interface (to find out more about fluent interfaces, see Chapter 2, Entities and Mapping Information). It allows us to retrieve the generated DQL queries through the
getDql() method (useful for debugging) or directly use the
Query object (provided by Doctrine).
To increase performance,
QueryBuilder caches the generated DQL queries and manages an internal state.
The full API and states of the DQL query are documented on the following website:
We will give an in-depth explanation of the
findWithComments() method that we ...