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Fixed #622 -- Added default_if_none filter. Thanks, Eric
git-svn-id: http://code.djangoproject.com/svn/django/trunk@859 bcc190cf-cafb-0310-a4f2-bffc1f526a37
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@ -333,6 +333,12 @@ def default(value, arg):
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"If value is unavailable, use given default"
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return value or arg
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def default_if_none(value, arg):
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"If value is None, use given default"
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if value is None:
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return arg
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return value
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def divisibleby(value, arg):
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"Returns true if the value is devisible by the argument"
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return int(value) % int(arg) == 0
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@ -569,25 +569,28 @@ Built-in filter reference
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-------------------------
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``add``
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Adds the arg to the value
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Adds the arg to the value.
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``addslashes``
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Adds slashes - useful for passing strings to JavaScript, for example.
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Adds slashes. Useful for passing strings to JavaScript, for example.
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``capfirst``
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Capitalizes the first character of the value
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Capitalizes the first character of the value.
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``center``
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Centers the value in a field of a given width
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Centers the value in a field of a given width.
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``cut``
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Removes all values of arg from the given string
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Removes all values of arg from the given string.
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``date``
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Formats a date according to the given format (same as the ``now`` tag)
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Formats a date according to the given format (same as the ``now`` tag).
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``default``
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If value is unavailable, use given default
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If value is unavailable, use given default.
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``default_if_none``
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If value is ``None``, use given default.
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``dictsort``
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Takes a list of dicts, returns that list sorted by the property given in the
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@ -598,24 +601,24 @@ Built-in filter reference
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given in the argument.
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``divisibleby``
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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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``escape``
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Escapes a string's HTML
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Escapes a string's HTML.
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``filesizeformat``
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Format the value like a 'human-readable' file size (i.e. 13 KB, 4.1 MB, 102
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bytes, etc).
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``first``
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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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``fix_ampersands``
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Replaces ampersands with ``&`` entities
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Replaces ampersands with ``&`` entities.
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``floatformat``
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Displays a floating point number as 34.2 (with one decimal places) - but
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only if there's a point to be displayed
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only if there's a point to be displayed.
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``get_digit``
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Given a whole number, returns the requested digit of it, where 1 is the
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@ -624,52 +627,52 @@ Built-in filter reference
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or if argument is less than 1). Otherwise, output is always an integer.
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``join``
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Joins a list with a string, like Python's ``str.join(list)``
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Joins a list with a string, like Python's ``str.join(list)``.
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``length``
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Returns the length of the value - useful for lists
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Returns the length of the value. Useful for lists.
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``length_is``
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Returns a boolean of whether the value's length is the argument
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Returns a boolean of whether the value's length is the argument.
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``linebreaks``
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Converts newlines into <p> and <br />s
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Converts newlines into ``<p>`` and ``<br />``s.
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``linebreaksbr``
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Converts newlines into <br />s
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Converts newlines into ``<br />``s.
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``linenumbers``
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Displays text with line numbers
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Displays text with line numbers.
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``ljust``
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Left-aligns the value in a field of a given width
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Left-aligns the value in a field of a given width.
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**Argument:** field size
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``lower``
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Converts a string into all lowercase
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Converts a string into all lowercase.
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``make_list``
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Returns the value turned into a list. For an integer, it's a list of
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digits. For a string, it's a list of characters.
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``phone2numeric``
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Takes a phone number and converts it in to its numerical equivalent
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Takes a phone number and converts it in to its numerical equivalent.
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``pluralize``
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Returns 's' if the value is not 1, for '1 vote' vs. '2 votes'
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Returns 's' if the value is not 1, for '1 vote' vs. '2 votes'.
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``pprint``
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A wrapper around pprint.pprint -- for debugging, really
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A wrapper around pprint.pprint -- for debugging, really.
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``random``
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Returns a random item from the list
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Returns a random item from the list.
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``removetags``
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Removes a space separated list of [X]HTML tags from the output
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Removes a space separated list of [X]HTML tags from the output.
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``rjust``
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Right-aligns the value in a field of a given width
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Right-aligns the value in a field of a given width.
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**Argument:** field size
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@ -696,19 +699,19 @@ Built-in filter reference
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of Python string formatting
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``striptags``
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Strips all [X]HTML tags
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Strips all [X]HTML tags.
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``time``
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Formats a time according to the given format (same as the ``now`` tag).
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``timesince``
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Formats a date as the time since that date (i.e. "4 days, 6 hours")
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Formats a date as the time since that date (i.e. "4 days, 6 hours").
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``title``
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Converts a string into titlecase
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Converts a string into titlecase.
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``truncatewords``
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Truncates a string after a certain number of words
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Truncates a string after a certain number of words.
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**Argument:** Number of words to truncate after
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@ -733,26 +736,27 @@ Built-in filter reference
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</li>
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``upper``
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Converts a string into all uppercase
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Converts a string into all uppercase.
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``urlencode``
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Escapes a value for use in a URL
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Escapes a value for use in a URL.
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``urlize``
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Converts URLs in plain text into clickable links
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Converts URLs in plain text into clickable links.
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``urlizetrunc``
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Converts URLs into clickable links, truncating URLs to the given character limit
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Converts URLs into clickable links, truncating URLs to the given character
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limit.
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**Argument:** Length to truncate URLs to.
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**Argument:** Length to truncate URLs to
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``wordcount``
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Returns the number of words
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Returns the number of words.
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``wordwrap``
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Wraps words at specified line length
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Wraps words at specified line length.
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**Argument:** number of words to wrap the text at.
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**Argument:** number of words at which to wrap the text
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``yesno``
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Given a string mapping values for true, false and (optionally) None,
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