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Merge pull request #1955 from nextcloud/dev-untyped-di

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Document deprecation of untyped DI queries
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Christoph Wurst 2020-04-10 16:08:18 +02:00 committed by GitHub
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developer_manual/app/upgrade-guide.rst
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@ -42,6 +42,25 @@ Symfony update
Symfony was updated to `v4.4 <https://github.com/symfony/symfony/blob/4.4/CHANGELOG-4.4.md>`_. The most important change for apps is to return an int value from CLI commands. Returning null (explicitly or implicitly) won't be allowed in future versions of Symfony.
Deprecation of injection of named services
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Apps had been able to query core services like the implementation of the interface ``\OCP\ITagManager`` as ``TagManager``. To unify the service resolution with type hints for the constructor injection, the named resolution is deprecated, logs warnings and will be removed in the future. Use the fully-qualifier class name (with the `::class` constant) instead:
If you had
.. code-block:: php
$tagManager = \OC::$server->query('TagManager');
change your code to
.. code-block:: php
$tagManager = \OC::$server->query(\OCP\ITagManager::class);
On constructor arguments you should always type-hint the service by its interface. If you do so already, nothing changes for you.
New APIs
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