1 from django.db import models
2 from django.contrib.contenttypes.models import ContentType
3 from django.contrib.contenttypes import generic
4 from django.contrib.sites.models import Site
5 from django.http import HttpResponse, HttpResponseServerError, HttpResponseRedirect
6 from django.core.servers.basehttp import FileWrapper
7 from django.core.urlresolvers import resolve
8 from django.template import add_to_builtins as register_templatetags
9 from inspect import getargspec
10 from philo.models.base import TreeEntity, Entity, QuerySetMapper
11 from philo.utils import ContentTypeSubclassLimiter
12 from philo.validators import RedirectValidator
13 from philo.exceptions import ViewDoesNotProvideSubpaths
16 _view_content_type_limiter = ContentTypeSubclassLimiter(None)
19 class Node(TreeEntity):
20 view_content_type = models.ForeignKey(ContentType, related_name='node_view_set', limit_choices_to=_view_content_type_limiter)
21 view_object_id = models.PositiveIntegerField()
22 view = generic.GenericForeignKey('view_content_type', 'view_object_id')
25 def accepts_subpath(self):
27 return self.view.accepts_subpath
30 def render_to_response(self, request, path=None, subpath=None, extra_context=None):
31 return self.view.render_to_response(self, request, path, subpath, extra_context)
37 # the following line enables the selection of a node as the root for a given django.contrib.sites Site object
38 models.ForeignKey(Node, related_name='sites', null=True, blank=True).contribute_to_class(Site, 'root_node')
42 nodes = generic.GenericRelation(Node, content_type_field='view_content_type', object_id_field='view_object_id')
44 accepts_subpath = False
46 def get_subpath(self, obj):
47 raise ViewDoesNotProvideSubpaths
49 def attributes_with_node(self, node):
50 return QuerySetMapper(self.attribute_set, passthrough=node.attributes)
52 def relationships_with_node(self, node):
53 return QuerySetMapper(self.relationship_set, passthrough=node.relationships)
55 def render_to_response(self, node, request, path=None, subpath=None, extra_context=None):
56 raise NotImplementedError('View subclasses must implement render_to_response.')
62 _view_content_type_limiter.cls = View
65 class MultiView(View):
66 accepts_subpath = True
70 def render_to_response(self, node, request, path=None, subpath=None, extra_context=None):
73 subpath = "/" + subpath
74 view, args, kwargs = resolve(subpath, urlconf=self)
75 view_args = getargspec(view)[0]
76 if extra_context is not None and 'extra_context' in view_args:
77 if 'extra_context' in kwargs:
78 extra_context.update(kwargs['extra_context'])
79 kwargs['extra_context'] = extra_context
80 if 'node' in view_args:
82 return view(request, *args, **kwargs)
93 target = models.CharField(max_length=200, validators=[RedirectValidator()])
94 status_code = models.IntegerField(choices=STATUS_CODES, default=302, verbose_name='redirect type')
96 def render_to_response(self, node, request, path=None, subpath=None, extra_context=None):
97 response = HttpResponseRedirect(self.target)
98 response.status_code = self.status_code
106 """ For storing arbitrary files """
108 mimetype = models.CharField(max_length=255)
109 file = models.FileField(upload_to='philo/files/%Y/%m/%d')
111 def render_to_response(self, node, request, path=None, subpath=None, extra_context=None):
112 wrapper = FileWrapper(self.file)
113 response = HttpResponse(wrapper, content_type=self.mimetype)
114 response['Content-Length'] = self.file.size
120 def __unicode__(self):
121 return self.file.name
124 register_templatetags('philo.templatetags.nodes')