Skip to content

[Reference][Constraints] caution on null values in Expression constraint #4202

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Sep 16, 2014
Merged

[Reference][Constraints] caution on null values in Expression constraint #4202

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
7 changes: 7 additions & 0 deletions reference/constraints/Expression.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -217,6 +217,13 @@ more about the expression language syntax, see
// ...
}

.. caution::

In Symfony 2.4 and Symfony 2.5, if the property (e.g. ``isTechnicalPost``)
were ``null``, the expression would never be called and the value
would be seen as valid. To ensure that the value is not ``null``,
use the :doc:`NotNull constraint </reference/constraints/NotNull>`.

For more information about the expression and what variables are available
to you, see the :ref:`expression <reference-constraint-expression-option>`
option details below.
Expand Down