10000 Added a note about ignoring invalid reference arguments in collection arguments by javiereguiluz · Pull Request #7834 · symfony/symfony-docs · GitHub
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Added a note about ignoring invalid reference arguments in collection arguments #7834

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Added a note about ignoring invalid reference arguments in collection arguments #7834

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Added a note about ignoring invalid reference arguments in colleciton… 
… arguments
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@javiereguiluz
javiereguiluz committed Apr 24, 2017
commit df13b3021fe36752bd40bbd773fa00ca037e1a26
6 changes: 6 additions & 0 deletions service_container/optional_dependencies.rst
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Expand Up @@ -121,6 +121,12 @@ call if the service exists and remove the method call if it does not:
))
;

.. note::

If the argument to the method call is a collection of arguments and any of
them is missing, those elements are removed but the method call is still
made with the remaining elements of the collection.

In YAML, the special ``@?`` syntax tells the service container that the dependency
is optional. Of course, the ``NewsletterManager`` must also be rewritten by
adding a ``setMailer()`` method::
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