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carlwitt
59d0eed9f7
Typo in first line: The merge filter merges an array with [removed: the] another array
42 lines
1.1 KiB
ReStructuredText
42 lines
1.1 KiB
ReStructuredText
``merge``
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=========
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The ``merge`` filter merges an array with another array:
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.. code-block:: jinja
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{% set values = [1, 2] %}
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{% set values = values|merge(['apple', 'orange']) %}
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{# values now contains [1, 2, 'apple', 'orange'] #}
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New values are added at the end of the existing ones.
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The ``merge`` filter also works on hashes:
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.. code-block:: jinja
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{% set items = { 'apple': 'fruit', 'orange': 'fruit', 'peugeot': 'unknown' } %}
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{% set items = items|merge({ 'peugeot': 'car', 'renault': 'car' }) %}
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{# items now contains { 'apple': 'fruit', 'orange': 'fruit', 'peugeot': 'car', 'renault': 'car' } #}
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For hashes, the merging process occurs on the keys: if the key does not
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already exist, it is added but if the key already exists, its value is
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overridden.
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.. tip::
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If you want to ensure that some values are defined in an array (by given
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default values), reverse the two elements in the call:
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.. code-block:: jinja
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{% set items = { 'apple': 'fruit', 'orange': 'fruit' } %}
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{% set items = { 'apple': 'unknown' }|merge(items) %}
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{# items now contains { 'apple': 'fruit', 'orange': 'fruit' } #}
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