Initial implementation of new Node system whereby Nodes are separate from the objects...

[philo.git] / models / nodes.py

diff --git a/models/nodes.py b/models/nodes.py
index 78df3d6..bb1601e 100644 (file)
--- a/models/nodes.py
+++ b/models/nodes.py
@@ -1,19 +1,30 @@
 from django.db import models
+from django.contrib.contenttypes.models import ContentType
+from django.contrib.contenttypes import generic
 from django.contrib.sites.models import Site
 from django.http import HttpResponse, HttpResponseServerError, HttpResponseRedirect
 from django.core.servers.basehttp import FileWrapper
-from philo.models.base import InheritableTreeEntity
+from philo.models.base import TreeEntity, Entity
+from philo.utils import ContentTypeSubclassLimiter
 from philo.validators import RedirectValidator
 
 
-class Node(InheritableTreeEntity):
-       accepts_subpath = False
+_view_content_type_limiter = ContentTypeSubclassLimiter(None)
+
+
+class Node(TreeEntity):
+       view_content_type = models.ForeignKey(ContentType, related_name='node_view_set', limit_choices_to=_view_content_type_limiter)
+       view_object_id = models.PositiveIntegerField()
+       view = generic.GenericForeignKey('view_content_type', 'view_object_id')
+       
+       @property
+       def accepts_subpath(self):
+               return self.view.accepts_subpath
        
        def render_to_response(self, request, path=None, subpath=None):
-               return HttpResponseServerError()
-               
+               return self.view.render_to_response(self, request, path, subpath)
+       
        class Meta:
-               unique_together = (('parent', 'slug'),)
                app_label = 'philo'
 
 
@@ -21,12 +32,28 @@ class Node(InheritableTreeEntity):
 models.ForeignKey(Node, related_name='sites', null=True, blank=True).contribute_to_class(Site, 'root_node')
 
 
-class MultiNode(Node):
+class View(Entity):
+       nodes = generic.GenericRelation(Node, content_type_field='view_content_type', object_id_field='view_object_id')
+       
+       accepts_subpath = False
+       
+       def render_to_response(self, node, request, path=None, subpath=None):
+               raise NotImplementedError('View subclasses must implement render_to_response.')
+       
+       class Meta:
+               abstract = True
+               app_label = 'philo'
+
+
+_view_content_type_limiter.cls = View
+
+
+class MultiView(View):
        accepts_subpath = True
        
        urlpatterns = []
        
-       def render_to_response(self, request, path=None, subpath=None):
+       def render_to_response(self, node, request, path=None, subpath=None):
                if not subpath:
                        subpath = ""
                subpath = "/" + subpath
@@ -39,15 +66,15 @@ class MultiNode(Node):
                app_label = 'philo'
 
 
-class Redirect(Node):
+class Redirect(View):
        STATUS_CODES = (
                (302, 'Temporary'),
                (301, 'Permanent'),
        )
-       target = models.CharField(max_length=200,validators=[RedirectValidator()])
+       target = models.CharField(max_length=200, validators=[RedirectValidator()])
        status_code = models.IntegerField(choices=STATUS_CODES, default=302, verbose_name='redirect type')
        
-       def render_to_response(self, request, path=None, subpath=None):
+       def render_to_response(self, node, request, path=None, subpath=None):
                response = HttpResponseRedirect(self.target)
                response.status_code = self.status_code
                return response
@@ -56,12 +83,13 @@ class Redirect(Node):
                app_label = 'philo'
 
 
-class File(Node):
+class File(View):
        """ For storing arbitrary files """
+       
        mimetype = models.CharField(max_length=255)
        file = models.FileField(upload_to='philo/files/%Y/%m/%d')
        
-       def render_to_response(self, request, path=None, subpath=None):
+       def render_to_response(self, node, request, path=None, subpath=None):
                wrapper = FileWrapper(self.file)
                response = HttpResponse(wrapper, content_type=self.mimetype)
                response['Content-Length'] = self.file.size