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Add a note that checking for flash messages defeats HTTP cacheability #21381

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Add a note that checking for flash messages defeats HTTP cacheability #21381

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8 changes: 8 additions & 0 deletions session.rst
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Expand Up @@ -265,6 +265,14 @@
different types of flash messages, but you can use any key that fits your
needs.

.. tip::

Accessing flash messages means that the session must be started, which

Check failure on line 270 in session.rst

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GitHub Actions / Lint (DOCtor-RST) 

Please remove trailing whitespace
in turn will cause Symfony to mark the responses as ``private``. In general,
since flashes shall displayed only once, pages that might display flashes
cannot reasonably be cached in HTTP caches


Configuration
-------------

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