``constant``
============
``constant`` returns the constant value for a given string:
.. code-block:: jinja
{{ some_date|date(constant('DATE_W3C')) }}
{{ constant('Namespace\\Classname::CONSTANT_NAME') }}
You can read constants from object instances as well:
.. code-block:: jinja
{{ constant('RSS', date) }}
Use the ``defined`` test to check if a constant is defined:
.. code-block:: jinja
{% if constant('SOME_CONST') is defined %}
...
{% endif %}
| Name | Type | Size | Permission | Actions |
|---|---|---|---|---|
| attribute.rst | File | 604 B | 0644 |
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| block.rst | File | 791 B | 0644 |
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| constant.rst | File | 487 B | 0644 |
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| country_timezones.rst | File | 799 B | 0644 |
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| cycle.rst | File | 548 B | 0644 |
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| date.rst | File | 1.06 KB | 0644 |
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| dump.rst | File | 1.56 KB | 0644 |
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| html_classes.rst | File | 899 B | 0644 |
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| include.rst | File | 2.24 KB | 0644 |
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| index.rst | File | 213 B | 0644 |
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| max.rst | File | 332 B | 0644 |
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| min.rst | File | 331 B | 0644 |
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| parent.rst | File | 563 B | 0644 |
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| random.rst | File | 1.05 KB | 0644 |
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| range.rst | File | 1.2 KB | 0644 |
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| source.rst | File | 694 B | 0644 |
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| template_from_string.rst | File | 888 B | 0644 |
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