Added a number of counting variables to the context when rendering shipherd navigatio...

[philo.git] / templatetags / collections.py

diff --git a/templatetags/collections.py b/templatetags/collections.py
index ed8c54e..38b3f91 100644 (file)
--- a/templatetags/collections.py
+++ b/templatetags/collections.py
@@ -1,5 +1,6 @@
 from django import template
 from django.conf import settings
+from django.contrib.contenttypes.models import ContentType
 
 
 register = template.Library()
@@ -8,22 +9,21 @@ register = template.Library()
 class MembersofNode(template.Node):
        def __init__(self, collection, model, as_var):
                self.collection = template.Variable(collection)
-               self.model = template.Variable(model)
+               self.model = model
                self.as_var = as_var
                
        def render(self, context):
                try:
                        collection = self.collection.resolve(context)
-                       model = self.model.resolve(context)
-                       context[self.as_var] = collection.members.with_model(model)
+                       context[self.as_var] = collection.members.with_model(self.model)
                except:
                        pass
-               return settings.TEMPLATE_STRING_IF_INVALID
-       
-       
+               return ''
+
+
 def do_membersof(parser, token):
        """
-       {% membersof <collection> with <model> as <var> %}
+       {% membersof <collection> with <app_label>.<model_name> as <var> %}
        """
        params=token.split_contents()
        tag = params[0]
@@ -33,11 +33,19 @@ def do_membersof(parser, token):
                
        if params[2] != 'with':
                raise template.TemplateSyntaxError('"%s" template tag requires the third parameter to be "with"' % tag)
+       
+       try:
+               app_label, model = params[3].strip('"').split('.')
+               ct = ContentType.objects.get(app_label=app_label, model=model)
+       except ValueError:
+               raise template.TemplateSyntaxError('"%s" template tag option "with" requires an argument of the form app_label.model (see django.contrib.contenttypes)' % tag)
+       except ContentType.DoesNotExist:
+               raise template.TemplateSyntaxError('"%s" template tag option "with" requires an argument of the form app_label.model which refers to an installed content type (see django.contrib.contenttypes)' % tag)
                
        if params[4] != 'as':
                raise template.TemplateSyntaxError('"%s" template tag requires the fifth parameter to be "as"' % tag)
        
-       return MembersofNode(collection=params[1], model=params[3], as_var=params[5])
+       return MembersofNode(collection=params[1], model=ct.model_class(), as_var=params[5])
 
 
 register.tag('membersof', do_membersof)
\ No newline at end of file