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|
``set``
=======
Inside code blocks you can also assign values to variables. Assignments use
the ``set`` tag and can have multiple targets.
Here is how you can assign the ``bar`` value to the ``foo`` variable:
.. code-block:: jinja
{% set foo = 'bar' %}
After the ``set`` call, the ``foo`` variable is available in the template like
any other ones:
.. code-block:: jinja
{# displays bar #}
{{ foo }}
The assigned value can be any valid :ref:`Twig expressions
<twig-expressions>`:
.. code-block:: jinja
{% set foo = [1, 2] %}
{% set foo = {'foo': 'bar'} %}
{% set foo = 'foo' ~ 'bar' %}
Several variables can be assigned in one block:
.. code-block:: jinja
{% set foo, bar = 'foo', 'bar' %}
{# is equivalent to #}
{% set foo = 'foo' %}
{% set bar = 'bar' %}
The ``set`` tag can also be used to 'capture' chunks of text:
.. code-block:: jinja
{% set foo %}
<div id="pagination">
...
</div>
{% endset %}
.. caution::
If you enable automatic output escaping, Twig will only consider the
content to be safe when capturing chunks of text.
.. note::
Note that loops are scoped in Twig; therefore a variable declared inside a
``for`` loop is not accessible outside the loop itself:
.. code-block:: jinja
{% for item in list %}
{% set foo = item %}
{% endfor %}
{# foo is NOT available #}
If you want to access the variable, just declare it before the loop:
.. code-block:: jinja
{% set foo = "" %}
{% for item in list %}
{% set foo = item %}
{% endfor %}
{# foo is available #}
|
