[github/wallabag/wallabag.git] / vendor / twig / twig / doc / tests / constant.rst

``constant``
============

.. versionadded: 1.13.1
    constant now accepts object instances as the second argument.

``constant`` checks if a variable has the exact same value as a constant. You
can use either global constants or class constants:

.. code-block:: jinja

    {% if post.status is constant('Post::PUBLISHED') %}
        the status attribute is exactly the same as Post::PUBLISHED
    {% endif %}

You can test constants from object instances as well:

.. code-block:: jinja

    {% if post.status is constant('PUBLISHED', post) %}
        the status attribute is exactly the same as Post::PUBLISHED
    {% endif %}
Commit	Line	Data
4f5b44bd NL	1	``constant``
	2	============
	3
	4	.. versionadded: 1.13.1
	5	constant now accepts object instances as the second argument.
	6
	7	``constant`` checks if a variable has the exact same value as a constant. You
	8	can use either global constants or class constants:
	9
	10	.. code-block:: jinja
	11
	12	{% if post.status is constant('Post::PUBLISHED') %}
	13	the status attribute is exactly the same as Post::PUBLISHED
	14	{% endif %}
	15
	16	You can test constants from object instances as well:
	17
	18	.. code-block:: jinja
	19
	20	{% if post.status is constant('PUBLISHED', post) %}
	21	the status attribute is exactly the same as Post::PUBLISHED
	22	{% endif %}