8000 Added info on doctrine metadata implications on validation by ThomasLandauer · Pull Request #6649 · symfony/symfony-docs · GitHub
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Added info on doctrine metadata implications on validation #6649

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Added info on doctrine metadata implications on validation #6649

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Added info on doctrine metadata implications on validation 
It took me a while to figure this out. So I think it should be explained *somewhere*. I'm not sure if this is the right place, and I'm also not sure if the information is comprehensive.
Just wanted to get somehing going about 'Doctrine and validation' somewhere in the docs.
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@ThomasLandauer
ThomasLandauer authored Jun 12, 2016
commit dbe120598ca6fd38b38adff456a2247d3849645b
9 changes: 9 additions & 0 deletions book/forms.rst
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Expand Up @@ -1277,6 +1277,15 @@ data is transferred to the underlying object immediately. If you want to
persist that data, you simply need to persist the object itself (which already
contains the submitted data).

Using Doctrine metadata for validation
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
If you've defined a `length` property of your Doctrine entity, a corresponding
`maxlength` attribute will be added automatically when rendering the form.
However, this only accounts for client-side validation on compatible browsers.
For true server-side validation, you still need to define corresponding rules,
as explained in :doc:`/book/validation`. Currently, it is not possible to re-use
Doctrine mapping metadata for validation directly.

.. index::
single: Forms; Embedded forms

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