mirror of
https://github.com/django/django.git
synced 2024-12-01 15:42:04 +01:00
Fixed #4793 -- Tweaked custom filter documentation a little to possibly reduce some confusion. Thanks, SmileyChris.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@6143 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
parent
ce249d4366
commit
1b0e588118
@ -642,7 +642,23 @@ your function. Example::
|
||||
"Converts a string into all lowercase"
|
||||
return value.lower()
|
||||
|
||||
When you've written your filter definition, you need to register it with
|
||||
Template filters which expect strings
|
||||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
|
||||
If you're writing a template filter which only expects a string as the first
|
||||
argument, you should use the included decorator ``stringfilter``. This will
|
||||
convert an object to it's string value before being passed to your function::
|
||||
|
||||
from django.template.defaultfilters import stringfilter
|
||||
|
||||
@stringfilter
|
||||
def lower(value):
|
||||
return value.lower()
|
||||
|
||||
Registering a custom filters
|
||||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
|
||||
Once you've written your filter definition, you need to register it with
|
||||
your ``Library`` instance, to make it available to Django's template language::
|
||||
|
||||
register.filter('cut', cut)
|
||||
@ -658,28 +674,18 @@ If you're using Python 2.4 or above, you can use ``register.filter()`` as a
|
||||
decorator instead::
|
||||
|
||||
@register.filter(name='cut')
|
||||
@stringfilter
|
||||
def cut(value, arg):
|
||||
return value.replace(arg, '')
|
||||
|
||||
@register.filter
|
||||
@stringfilter
|
||||
def lower(value):
|
||||
return value.lower()
|
||||
|
||||
If you leave off the ``name`` argument, as in the second example above, Django
|
||||
will use the function's name as the filter name.
|
||||
|
||||
Template filters which expect strings
|
||||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
If you are writing a template filter which only expects a string as the first
|
||||
argument, you should use the included decorator ``stringfilter`` which will convert
|
||||
an object to it's string value before being passed to your function::
|
||||
|
||||
from django.template.defaultfilters import stringfilter
|
||||
|
||||
@stringfilter
|
||||
def lower(value):
|
||||
return value.lower()
|
||||
|
||||
Writing custom template tags
|
||||
----------------------------
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user