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authorDevian <devianleong@gmail.com>2021-04-22 17:11:12 +0800
committerDevian <devianleong@gmail.com>2021-04-22 17:11:12 +0800
commitbf68fa166afb95d682007e7671c2b0692227bec5 (patch)
tree26091a1e5a821905b8bdba73fd1ddb95e12f887e /vendor/doctrine/collections/docs/en/lazy-collections.rst
parent745cf2431a71d0e6c5f08f8605839279b2f7496e (diff)
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-Lazy Collections
-================
-
-To create a lazy collection you can extend the
-``Doctrine\Common\Collections\AbstractLazyCollection`` class
-and define the ``doInitialize`` method. Here is an example where
-we lazily query the database for a collection of user records:
-
-.. code-block:: php
- use Doctrine\DBAL\Connection;
-
- class UsersLazyCollection extends AbstractLazyCollection
- {
- /** @var Connection */
- private $connection;
-
- public function __construct(Connection $connection)
- {
- $this->connection = $connection;
- }
-
- protected function doInitialize() : void
- {
- $this->collection = $this->connection->fetchAll('SELECT * FROM users');
- }
- }