Initial extension of containers to support referencing objects of arbitrary type.
[philo.git] / models.py
index 78ce9a9..41e9a15 100644 (file)
--- a/models.py
+++ b/models.py
@@ -23,26 +23,12 @@ from django.http import Http404, HttpResponse, HttpResponseServerError, HttpResp
 from django.core.servers.basehttp import FileWrapper
 
 
-_value_models = {}
-_value_models_ct_pks = []
-
-
 def register_value_model(model):
-       if issubclass(model, models.Model):
-               if model not in _value_models:
-                       _value_models[model] = ContentType.objects.get_for_model(model)
-                       _value_models_ct_pks.append(_value_models[model].pk)
-       else:
-               raise TypeError('philo.models.register_value_model only accepts subclasses of django.db.models.Model')
+       pass
 
 
 def unregister_value_model(model):
-       if issubclass(model, models.Model):
-               if model in _value_models:
-                       _value_models_ct_pks.remove(_value_models[model].pk)
-                       del _value_models[model]
-       else:
-               raise TypeError('philo.models.unregister_value_model only accepts subclasses of django.db.models.Model')
+       pass
 
 
 class Attribute(models.Model):
@@ -72,7 +58,7 @@ class Relationship(models.Model):
        entity_object_id = models.PositiveIntegerField(verbose_name='Entity ID')
        entity = generic.GenericForeignKey('entity_content_type', 'entity_object_id')
        key = models.CharField(max_length=255)
-       value_content_type = models.ForeignKey(ContentType, related_name='relationship_value_set', limit_choices_to={'pk__in': _value_models_ct_pks}, verbose_name='Value type')
+       value_content_type = models.ForeignKey(ContentType, related_name='relationship_value_set', verbose_name='Value type')
        value_object_id = models.PositiveIntegerField(verbose_name='Value ID')
        value = generic.GenericForeignKey('value_content_type', 'value_object_id')
        
@@ -123,17 +109,14 @@ class CollectionMemberManager(models.Manager):
        use_for_related_fields = True
 
        def with_model(self, model):
-               if model in _value_models:
-                       return model._default_manager.filter(pk__in=self.filter(member_content_type=_value_models[model]).values_list('member_object_id', flat=True))
-               else:
-                       raise TypeError('CollectionMemberManager.with_model only accepts models previously registered with philo.models.register_value_model')
+               return model._default_manager.filter(pk__in=self.filter(member_content_type=ContentType.objects.get_for_model(model)).values_list('member_object_id', flat=True))
 
 
 class CollectionMember(models.Model):
        objects = CollectionMemberManager()
        collection = models.ForeignKey(Collection, related_name='members')
        index = models.PositiveIntegerField(verbose_name='Index', help_text='This will determine the ordering of the item within the collection. (Optional)', null=True, blank=True)
-       member_content_type = models.ForeignKey(ContentType, limit_choices_to={'pk__in': _value_models_ct_pks}, verbose_name='Member type')
+       member_content_type = models.ForeignKey(ContentType, verbose_name='Member type')
        member_object_id = models.PositiveIntegerField(verbose_name='Member ID')
        member = generic.GenericForeignKey('member_content_type', 'member_object_id')
 
@@ -299,37 +282,46 @@ class Template(TreeModel):
        @property
        def containers(self):
                """
-               Returns a list of names of contentlets referenced by containers. 
+               Returns a tuple where the first item is a list of names of contentlets referenced by containers,
+               and the second item is a list of tuples of names and contenttypes of contentreferences referenced by containers.
                This will break if there is a recursive extends or includes in the template code.
                Due to the use of an empty Context, any extends or include tags with dynamic arguments probably won't work.
                """
-               def container_node_names(template):
-                       def nodelist_container_node_names(nodelist):
-                               names = []
+               def container_nodes(template):
+                       def nodelist_container_nodes(nodelist):
+                               nodes = []
                                for node in nodelist:
                                        try:
                                                for nodelist_name in ('nodelist', 'nodelist_loop', 'nodelist_empty', 'nodelist_true', 'nodelist_false'):
                                                        if hasattr(node, nodelist_name):
-                                                               names.extend(nodelist_container_node_names(getattr(node, nodelist_name)))
+                                                               nodes.extend(nodelist_container_nodes(getattr(node, nodelist_name)))
                                                if isinstance(node, ContainerNode):
-                                                       names.append(node.name)
+                                                       nodes.append(node)
                                                elif isinstance(node, ExtendsNode):
                                                        extended_template = node.get_parent(Context())
                                                        if extended_template:
-                                                               names.extend(container_node_names(extended_template))
+                                                               nodes.extend(container_nodes(extended_template))
                                                elif isinstance(node, ConstantIncludeNode):
                                                        included_template = node.template
                                                        if included_template:
-                                                               names.extend(container_node_names(included_template))
+                                                               nodes.extend(container_nodes(included_template))
                                                elif isinstance(node, IncludeNode):
                                                        included_template = get_template(node.template_name.resolve(Context()))
                                                        if included_template:
-                                                               names.extend(container_node_names(included_template))
+                                                               nodes.extend(container_nodes(included_template))
                                        except:
                                                pass # fail for this node
-                               return names
-                       return nodelist_container_node_names(template.nodelist)
-               return set(container_node_names(self.django_template))
+                               return nodes
+                       return nodelist_container_nodes(template.nodelist)
+               all_nodes = container_nodes(self.django_template)
+               contentlet_node_names = set([node.name for node in all_nodes if not node.references])
+               contentreference_node_names = []
+               contentreference_node_specs = []
+               for node in all_nodes:
+                       if node.references and node.name not in contentreference_node_names:
+                               contentreference_node_specs.append((node.name, node.references))
+                               contentreference_node_names.append(node.name)
+               return contentlet_node_names, contentreference_node_specs
        
        def __unicode__(self):
                return self.get_path(u' › ', 'name')
@@ -366,6 +358,14 @@ class Contentlet(models.Model):
        dynamic = models.BooleanField(default=False)
 
 
+class ContentReference(models.Model):
+       page = models.ForeignKey(Page, related_name='contentreferences')
+       name = models.CharField(max_length=255)
+       content_type = models.ForeignKey(ContentType, verbose_name='Content type')
+       content_id = models.PositiveIntegerField(verbose_name='Content ID')
+       content = generic.GenericForeignKey('content_type', 'content_id')
+
+
 register_templatetags('philo.templatetags.containers')