Changes between Version 43 and Version 44 of BackwardsIncompatibleChanges

Timestamp:

Nov 26, 2005, 5:33:52 PM (19 years ago)

Author:

rjwittams

Comment:

--

BackwardsIncompatibleChanges

@@ -369 +369 @@
 == Changed the way custom template tags and filters are registered ==
 
-As of [], we changed the way custom template tags and filters are registered. If you've written custom template tags or filters, you'll need to make a couple of changes:
+As of [1443], we changed the way custom template tags and filters are registered. If you've written custom template tags or filters, you'll need to make a couple of changes:
 
 === Filter arguments ===
@@ -413 +413 @@
 If you're using the undocumented template decorators (simple_tag and inclusion_tag), change your calls to be members of the library class.
 
-[INSERT EXAMPLE HERE]
+register.simple_tag(func)
+
+register.inclusion_tag('template/name')(func)
+
+=== Change template tags that use filters ===
+
+Filters are compiled at compile time now. 
+
+Old way:
+{{{
+
+class SomethingNode(Node):
+    def __init__(self, filter_string):
+        self.filter_string = filter_string
+
+    def render(self, context):
+        var = render_variable_with_filters(self.filter_string, context)
+        return var
+
+def do_something(parser, token):
+    filter_string = bits[1]
+    return SomethingNode(filter_string)
+
+}}}
+
+New way:
+{{{
+
+class SomethingNode(Node):
+    def __init__(self, filter_expr):
+        self.filter_expr = filter_expr
+
+    def render(self, context):
+        var = self.filter_expr.resolve(context)
+        return var
+
+def do_something(parser, token):
+    filter_string = bits[1]
+    filter_expr = parser.compile_filter(filter_string)
+    return SomethingNode(filter_expr)
+
+}}}
 
 See [http://www.djangoproject.com/documentation/templates_python/#writing-custom-template-filters Writing custom template filters] and [http://www.djangoproject.com/documentation/templates_python/#writing-custom-template-tags Writing custom template tags] for full documentation.