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Update 3.3-di-changes.rst #9695

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Update 3.3-di-changes.rst
DonCallisto Apr 27, 2018
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PR request changes
DonCallisto May 18, 2018
e154d32
Typo fixing
DonCallisto May 18, 2018
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10 changes: 10 additions & 0 deletions service_container/3.3-di-changes.rst
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Expand Up @@ -568,6 +568,16 @@ Start by updating the service ids to class names:
  you can't redefine the service as ``Twig_Extensions_Extension_Intl: ~`` and
you must keep the original ``class`` parameter.

.. caution::

If a service is processed by a :doc:`compiler pass </service_container/compiler_passes>`,
you could face a "You have requested a non-existent service" error.
To get rid of this, be sure that the Compiler Pass is using ``findDefinition()``
instead of ``getDefinition()``. The latter won't take aliases into
account when looking up for services.
Furthermore it is always recommendend to check for definition existance
using ``has()`` function.

But, this change will break our app! The old service ids (e.g. ``app.github_notifier``)
no longer exist. The simplest way to fix this is to find all your old service ids
and update them to the new class id: ``app.github_notifier`` to ``App\Service\GitHubNotifier``.
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