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add examples for is safe False register.filter
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@ -1535,7 +1535,7 @@ Built-in filter reference
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Adds the argument to the value.
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Adds the argument to the value.
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For example:
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For example in a template:
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.. code-block:: html+django
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.. code-block:: html+django
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@ -1543,12 +1543,21 @@ For example:
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If ``value`` is ``4``, then the output will be ``6``.
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If ``value`` is ``4``, then the output will be ``6``.
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For example in Python:
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.. code-block:: python
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from django.template.defaultfilters import add
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sometext = add(4, 2)
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The value of ``sometext`` will be ``6``.
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This filter will first try to coerce both values to integers. If this fails,
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This filter will first try to coerce both values to integers. If this fails,
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it'll attempt to add the values together anyway. This will work on some data
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it'll attempt to add the values together anyway. This will work on some data
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types (strings, list, etc.) and fail on others. If it fails, the result will
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types (strings, list, etc.) and fail on others. If it fails, the result will
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be an empty string.
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be an empty string.
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For example, if we have:
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For example in a template:
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.. code-block:: html+django
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.. code-block:: html+django
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@ -1557,6 +1566,15 @@ For example, if we have:
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and ``first`` is ``[1, 2, 3]`` and ``second`` is ``[4, 5, 6]``, then the
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and ``first`` is ``[1, 2, 3]`` and ``second`` is ``[4, 5, 6]``, then the
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output will be ``[1, 2, 3, 4, 5, 6]``.
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output will be ``[1, 2, 3, 4, 5, 6]``.
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For example in Python:
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.. code-block:: python
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from django.template.defaultfilters import add
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sometext = add([1, 2, 3], [4, 5, 6])
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The output of ``sometext`` will be ``[1, 2, 3, 4, 5, 6]``.
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.. warning::
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.. warning::
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Strings that can be coerced to integers will be **summed**, not
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Strings that can be coerced to integers will be **summed**, not
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@ -1868,7 +1886,7 @@ representation of a ``datetime`` value. E.g.:
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If value evaluates to ``False``, uses the given default. Otherwise, uses the
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If value evaluates to ``False``, uses the given default. Otherwise, uses the
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value.
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value.
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For example:
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For example in a template:
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.. code-block:: html+django
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.. code-block:: html+django
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@ -1876,6 +1894,15 @@ For example:
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If ``value`` is ``""`` (the empty string), the output will be ``nothing``.
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If ``value`` is ``""`` (the empty string), the output will be ``nothing``.
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For example in Python:
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.. code-block:: python
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from django.template.defaultfilters import default
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sometext = default("", "nothing")
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The output of ``sometext`` will be ``nothing``.
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.. templatefilter:: default_if_none
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.. templatefilter:: default_if_none
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``default_if_none``
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``default_if_none``
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@ -1887,7 +1914,7 @@ value.
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Note that if an empty string is given, the default value will *not* be used.
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Note that if an empty string is given, the default value will *not* be used.
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Use the :tfilter:`default` filter if you want to fallback for empty strings.
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Use the :tfilter:`default` filter if you want to fallback for empty strings.
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For example:
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For example in a template:
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.. code-block:: html+django
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.. code-block:: html+django
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@ -1895,6 +1922,15 @@ For example:
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If ``value`` is ``None``, the output will be ``nothing``.
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If ``value`` is ``None``, the output will be ``nothing``.
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For example in Python:
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.. code-block:: python
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from django.template.defaultfilters import default_if_none
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sometext = default_if_none(None, "nothing")
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The output of ``sometext`` will be ``nothing``.
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.. templatefilter:: dictsort
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.. templatefilter:: dictsort
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``dictsort``
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``dictsort``
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@ -1903,6 +1939,9 @@ If ``value`` is ``None``, the output will be ``nothing``.
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Takes a list of dictionaries and returns that list sorted by the key given in
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Takes a list of dictionaries and returns that list sorted by the key given in
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the argument.
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the argument.
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Template Examples
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=================
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For example:
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For example:
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.. code-block:: html+django
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.. code-block:: html+django
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@ -1989,6 +2028,78 @@ produce empty output:
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{{ values|dictsort:"0" }}
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{{ values|dictsort:"0" }}
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Python Examples
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===============
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For example in Python:
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.. code-block:: python
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from django.template.defaultfilters import dictsort
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sorted_list = dictsort([
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{"name": "zed", "age": 19},
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{"name": "amy", "age": 22},
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{"name": "joe", "age": 31},
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], "name")
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The value of ``sorted_list`` will be:
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.. code-block:: python
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[
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{"name": "amy", "age": 22},
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{"name": "joe", "age": 31},
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{"name": "zed", "age": 19},
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]
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You can also do more complicated things like:
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For example in Python:
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.. code-block:: python
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from django.template.defaultfilters import dictsort
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sorted_list = dictsort([
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{"title": "1984", "author": {"name": "George", "age": 45}},
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{"title": "Timequake", "author": {"name": "Kurt", "age": 75}},
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{"title": "Alice", "author": {"name": "Lewis", "age": 33}},
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], "author.age")
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The value of ``sorted_list`` will be:
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.. code-block:: python
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[
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{"title": "Alice", "author": {"name": "Lewis", "age": 33}},
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{"title": "1984", "author": {"name": "George", "age": 45}},
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{"title": "Timequake", "author": {"name": "Kurt", "age": 75}},
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]
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``dictsort`` can also order a list of lists (or any other object implementing
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``__getitem__()``) by elements at specified index. For example:
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For example in Python:
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.. code-block:: python
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from django.template.defaultfilters import dictsort
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sorted_list = dictsort([
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("a", "42"),
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("c", "string"),
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("b", "foo"),
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], 0)
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The value of ``sorted_list`` will be:
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.. code-block:: python
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[
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("a", "42"),
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("b", "foo"),
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("c", "string"),
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]
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Ordering by elements at specified index is not supported on dictionaries.
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Ordering by elements at specified index is not supported on dictionaries.
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.. templatefilter:: dictsortreversed
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.. templatefilter:: dictsortreversed
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@ -2007,7 +2118,7 @@ but the returned value will be in reverse order.
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Returns ``True`` if the value is divisible by the argument.
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Returns ``True`` if the value is divisible by the argument.
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For example:
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For example in a template:
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.. code-block:: html+django
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.. code-block:: html+django
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@ -2015,6 +2126,15 @@ For example:
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If ``value`` is ``21``, the output would be ``True``.
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If ``value`` is ``21``, the output would be ``True``.
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For example in Python:
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.. code-block:: python
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from django.template.defaultfilters import divisibleby
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is_divisible = divisibleby(21, 3)
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The value of ``is_divisible`` will be ``True``.
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.. templatefilter:: escape
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.. templatefilter:: escape
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``escape``
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``escape``
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@ -2144,7 +2264,7 @@ The value of ``formatted_size`` will be ``'117.7\xa0MB'``.
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Returns the first item in a list.
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Returns the first item in a list.
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For example:
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For example in a template:
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.. code-block:: html+django
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.. code-block:: html+django
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@ -2152,6 +2272,15 @@ For example:
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If ``value`` is the list ``['a', 'b', 'c']``, the output will be ``'a'``.
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If ``value`` is the list ``['a', 'b', 'c']``, the output will be ``'a'``.
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For example in Python:
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.. code-block:: python
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from django.template.defaultfilters import first
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first_item = first(['a', 'b', 'c'])
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The value of ``first_item`` will be ``'a'``.
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.. templatefilter:: floatformat
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.. templatefilter:: floatformat
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``floatformat``
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``floatformat``
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@ -2268,7 +2397,7 @@ digit, 2 is the second-right-most digit, etc. Returns the original value for
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invalid input (if input or argument is not an integer, or if argument is less
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invalid input (if input or argument is not an integer, or if argument is less
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than 1). Otherwise, output is always an integer.
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than 1). Otherwise, output is always an integer.
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For example:
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For example in a template:
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.. code-block:: html+django
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.. code-block:: html+django
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@ -2276,6 +2405,15 @@ For example:
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If ``value`` is ``123456789``, the output will be ``8``.
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If ``value`` is ``123456789``, the output will be ``8``.
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For example in Python:
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.. code-block:: python
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from django.template.defaultfilters import get_digit
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digit = get_digit(123456789, 2)
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The output of ``digit`` will be ``8``.
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.. templatefilter:: iriencode
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.. templatefilter:: iriencode
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``iriencode``
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``iriencode``
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@ -2394,7 +2532,7 @@ The value of ``last_item`` will be ``"d"``.
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Returns the length of the value. This works for both strings and lists.
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Returns the length of the value. This works for both strings and lists.
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For example:
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For example in a template:
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.. code-block:: html+django
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.. code-block:: html+django
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@ -2403,6 +2541,15 @@ For example:
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If ``value`` is ``['a', 'b', 'c', 'd']`` or ``"abcd"``, the output will be
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If ``value`` is ``['a', 'b', 'c', 'd']`` or ``"abcd"``, the output will be
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``4``.
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``4``.
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For example in Python:
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.. code-block:: python
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from django.template.defaultfilters import length
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length_of_value = length(['a', 'b', 'c', 'd'])
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The value of ``length_of_value`` will be ``4``.
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The filter returns ``0`` for an undefined variable.
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The filter returns ``0`` for an undefined variable.
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.. templatefilter:: linebreaks
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.. templatefilter:: linebreaks
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@ -2541,7 +2688,7 @@ The output will be ``"totally loving this album!"``.
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Returns the value turned into a list. For a string, it's a list of characters.
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Returns the value turned into a list. For a string, it's a list of characters.
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For an integer, the argument is cast to a string before creating a list.
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For an integer, the argument is cast to a string before creating a list.
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For example:
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For example in a template:
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.. code-block:: html+django
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.. code-block:: html+django
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@ -2551,6 +2698,15 @@ If ``value`` is the string ``"Joel"``, the output would be the list
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``['J', 'o', 'e', 'l']``. If ``value`` is ``123``, the output will be the
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``['J', 'o', 'e', 'l']``. If ``value`` is ``123``, the output will be the
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list ``['1', '2', '3']``.
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list ``['1', '2', '3']``.
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For example in Python:
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.. code-block:: python
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from django.template.defaultfilters import make_list
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list_of_chars = make_list("Joel")
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The output will be the list ``['J', 'o', 'e', 'l']``.
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.. templatefilter:: phone2numeric
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.. templatefilter:: phone2numeric
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``phone2numeric``
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``phone2numeric``
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@ -2578,6 +2734,9 @@ If ``value`` is ``800-COLLECT``, the output will be ``800-2655328``.
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Returns a plural suffix if the value is not ``1``, ``'1'``, or an object of
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Returns a plural suffix if the value is not ``1``, ``'1'``, or an object of
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length 1. By default, this suffix is ``'s'``.
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length 1. By default, this suffix is ``'s'``.
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Template Examples
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=================
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Example:
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Example:
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.. code-block:: html+django
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.. code-block:: html+django
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@ -2605,6 +2764,42 @@ Example:
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You have {{ num_cherries }} cherr{{ num_cherries|pluralize:"y,ies" }}.
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You have {{ num_cherries }} cherr{{ num_cherries|pluralize:"y,ies" }}.
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Python Examples
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===============
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.. code-block:: python
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from django.template.defaultfilters import pluralize
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single_message = f"You have 1 message{{pluralize(1)}}"
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multiple_messages = f"You have 2 messages{{pluralize(2)}}"
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The output of ``single_message`` will be ``You have 1 message``. The output of
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``multiple_messages`` will be ``'You have 2 messages'``.
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For words that require a suffix other than ``'s'``, you can provide an alternate
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suffix as a parameter to the filter.
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.. code-block:: python
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from django.template.defaultfilters import pluralize
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single_walrus = f"You have 1 walrus{pluralize(1, "es")}"
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multiple_walrus = f"You have 1 walrus{pluralize(2, "es")}"
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The output of ``single_walrus`` will be ``'You have 1 walrus'``. The output of
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``multiple_walrus`` will be ``'You have 2 walruses'``.
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For words that don't pluralize by simple suffix, you can specify
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both a singular and plural suffix, separated by a comma.
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.. code-block:: python
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from django.template.defaultfilters import pluralize
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cherry_singular = f"You have 1 cherr{pluralize(1, "y,ies")}"
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cherry_pluralized = f"You have 1 cherr{pluralize(2, "y,ies")}"
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The output of ``cherry_singular`` will be ``'You have 1 cherry'``. The output of
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``cherry_pluralized`` will be ``'You have 2 cherries'``.
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.. note:: Use :ttag:`blocktranslate` to pluralize translated strings.
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.. note:: Use :ttag:`blocktranslate` to pluralize translated strings.
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.. templatefilter:: pprint
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.. templatefilter:: pprint
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@ -3155,7 +3350,7 @@ contains ``['States', ['Kansas', ['Lawrence', 'Topeka'], 'Illinois']]``, then
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Converts a string into all uppercase.
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Converts a string into all uppercase.
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For example:
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For example in a template:
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.. code-block:: html+django
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.. code-block:: html+django
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@ -3163,6 +3358,15 @@ For example:
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If ``value`` is ``"Joel is a slug"``, the output will be ``"JOEL IS A SLUG"``.
|
If ``value`` is ``"Joel is a slug"``, the output will be ``"JOEL IS A SLUG"``.
|
||||||
|
|
||||||
|
For example in Python:
|
||||||
|
|
||||||
|
.. code-block:: python
|
||||||
|
|
||||||
|
from django.template.defaultfilters import upper
|
||||||
|
uppercased = upper("Joel is a slug")
|
||||||
|
|
||||||
|
The output of ``uppercased`` will be ``"JOEL IS A SLUG"``.
|
||||||
|
|
||||||
.. templatefilter:: urlencode
|
.. templatefilter:: urlencode
|
||||||
|
|
||||||
``urlencode``
|
``urlencode``
|
||||||
@ -3170,7 +3374,7 @@ If ``value`` is ``"Joel is a slug"``, the output will be ``"JOEL IS A SLUG"``.
|
|||||||
|
|
||||||
Escapes a value for use in a URL.
|
Escapes a value for use in a URL.
|
||||||
|
|
||||||
For example:
|
For example in a template:
|
||||||
|
|
||||||
.. code-block:: html+django
|
.. code-block:: html+django
|
||||||
|
|
||||||
@ -3179,11 +3383,23 @@ For example:
|
|||||||
If ``value`` is ``"https://www.example.org/foo?a=b&c=d"``, the output will be
|
If ``value`` is ``"https://www.example.org/foo?a=b&c=d"``, the output will be
|
||||||
``"https%3A//www.example.org/foo%3Fa%3Db%26c%3Dd"``.
|
``"https%3A//www.example.org/foo%3Fa%3Db%26c%3Dd"``.
|
||||||
|
|
||||||
|
For example in Python:
|
||||||
|
|
||||||
|
.. code-block:: python
|
||||||
|
|
||||||
|
from django.template.defaultfilters import urlencode
|
||||||
|
|
||||||
|
escaped = urlencode("https://www.example.org/foo?a=b&c=d")
|
||||||
|
|
||||||
|
The output of ``escaped`` will be ``"https%3A//www.example.org/foo%3Fa%3Db%26c%3Dd"``.
|
||||||
|
|
||||||
An optional argument containing the characters which should not be escaped can
|
An optional argument containing the characters which should not be escaped can
|
||||||
be provided.
|
be provided.
|
||||||
|
|
||||||
If not provided, the '/' character is assumed safe. An empty string can be
|
If not provided, the '/' character is assumed safe. An empty string can be
|
||||||
provided when *all* characters should be escaped. For example:
|
provided when *all* characters should be escaped.
|
||||||
|
|
||||||
|
For example in a template:
|
||||||
|
|
||||||
.. code-block:: html+django
|
.. code-block:: html+django
|
||||||
|
|
||||||
@ -3192,6 +3408,16 @@ provided when *all* characters should be escaped. For example:
|
|||||||
If ``value`` is ``"https://www.example.org/"``, the output will be
|
If ``value`` is ``"https://www.example.org/"``, the output will be
|
||||||
``"https%3A%2F%2Fwww.example.org%2F"``.
|
``"https%3A%2F%2Fwww.example.org%2F"``.
|
||||||
|
|
||||||
|
For example in Python:
|
||||||
|
|
||||||
|
.. code-block:: python
|
||||||
|
|
||||||
|
from django.template.defaultfilters import urlencode
|
||||||
|
|
||||||
|
escaped = urlencode("https://www.example.org/", "")
|
||||||
|
|
||||||
|
The output of ``escaped`` will be ``"https%3A%2F%2Fwww.example.org%2F"``.
|
||||||
|
|
||||||
.. templatefilter:: urlize
|
.. templatefilter:: urlize
|
||||||
|
|
||||||
``urlize``
|
``urlize``
|
||||||
@ -3280,7 +3506,7 @@ As with urlize_, this filter should only be applied to plain text.
|
|||||||
|
|
||||||
Returns the number of words.
|
Returns the number of words.
|
||||||
|
|
||||||
For example:
|
For example in a template:
|
||||||
|
|
||||||
.. code-block:: html+django
|
.. code-block:: html+django
|
||||||
|
|
||||||
@ -3288,6 +3514,16 @@ For example:
|
|||||||
|
|
||||||
If ``value`` is ``"Joel is a slug"``, the output will be ``4``.
|
If ``value`` is ``"Joel is a slug"``, the output will be ``4``.
|
||||||
|
|
||||||
|
For example in Python:
|
||||||
|
|
||||||
|
.. code-block:: python
|
||||||
|
|
||||||
|
from django.template.defaultfilters import wordcount
|
||||||
|
|
||||||
|
count = wordcount("Joel is a slug")
|
||||||
|
|
||||||
|
The output of ``count`` will be ``4``.
|
||||||
|
|
||||||
.. templatefilter:: wordwrap
|
.. templatefilter:: wordwrap
|
||||||
|
|
||||||
``wordwrap``
|
``wordwrap``
|
||||||
@ -3330,12 +3566,23 @@ Maps values for ``True``, ``False``, and (optionally) ``None``, to the strings
|
|||||||
"yes", "no", "maybe", or a custom mapping passed as a comma-separated list, and
|
"yes", "no", "maybe", or a custom mapping passed as a comma-separated list, and
|
||||||
returns one of those strings according to the value:
|
returns one of those strings according to the value:
|
||||||
|
|
||||||
For example:
|
For example in a template:
|
||||||
|
|
||||||
.. code-block:: html+django
|
.. code-block:: html+django
|
||||||
|
|
||||||
{{ value|yesno:"yeah,no,maybe" }}
|
{{ value|yesno:"yeah,no,maybe" }}
|
||||||
|
|
||||||
|
For example in Python:
|
||||||
|
|
||||||
|
.. code-block:: python
|
||||||
|
|
||||||
|
from django.template.defaultfilters import yesno
|
||||||
|
|
||||||
|
result = yesno(True, "yeah,no,maybe")
|
||||||
|
|
||||||
|
The table below shows the possible inputs and outputs for both template usage
|
||||||
|
and Python usage:
|
||||||
|
|
||||||
========== ====================== ===========================================
|
========== ====================== ===========================================
|
||||||
Value Argument Outputs
|
Value Argument Outputs
|
||||||
========== ====================== ===========================================
|
========== ====================== ===========================================
|
||||||
|
Loading…
x
Reference in New Issue
Block a user