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autoescape.rst	1.65 KB	-rw-r--r--
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filter.rst	463 B	-rw-r--r--
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from.rst	275 B	-rw-r--r--
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index.rst	238 B	-rw-r--r--
macro.rst	2.61 KB	-rw-r--r--
sandbox.rst	764 B	-rw-r--r--
set.rst	1.64 KB	-rw-r--r--
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with.rst	1.07 KB	-rw-r--r--

``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 #}