import mimetypes
from os.path import basename
+from django.conf import settings
from django.contrib.contenttypes import generic
from django.contrib.contenttypes.models import ContentType
from django.contrib.sites.models import Site, RequestSite
+from django.core.cache import cache
from django.core.exceptions import ValidationError
from django.core.servers.basehttp import FileWrapper
from django.core.urlresolvers import resolve, clear_url_caches, reverse, NoReverseMatch
_view_content_type_limiter = ContentTypeSubclassLimiter(None)
+CACHE_PHILO_ROOT = getattr(settings, "PHILO_CACHE_PHILO_ROOT", True)
class Node(SlugTreeEntity):
:class:`Node`\ s are the basic building blocks of a website using Philo. They define the URL hierarchy and connect each URL to a :class:`View` subclass instance which is used to generate an HttpResponse.
"""
- view_content_type = models.ForeignKey(ContentType, related_name='node_view_set', limit_choices_to=_view_content_type_limiter)
- view_object_id = models.PositiveIntegerField()
+ view_content_type = models.ForeignKey(ContentType, related_name='node_view_set', limit_choices_to=_view_content_type_limiter, blank=True, null=True)
+ view_object_id = models.PositiveIntegerField(blank=True, null=True)
#: :class:`GenericForeignKey` to a non-abstract subclass of :class:`View`
view = generic.GenericForeignKey('view_content_type', 'view_object_id')
@property
def accepts_subpath(self):
"""A property shortcut for :attr:`self.view.accepts_subpath <View.accepts_subpath>`"""
- if self.view:
- return self.view.accepts_subpath
+ if self.view_object_id and self.view_content_type_id:
+ return ContentType.objects.get_for_id(self.view_content_type_id).model_class().accepts_subpath
return False
def handles_subpath(self, subpath):
- return self.view.handles_subpath(subpath)
+ if self.view_object_id and self.view_content_type_id:
+ return ContentType.objects.get_for_id(self.view_content_type_id).model_class().handles_subpath(subpath)
+ return False
def render_to_response(self, request, extra_context=None):
"""This is a shortcut method for :meth:`View.render_to_response`"""
- return self.view.render_to_response(request, extra_context)
+ if self.view_object_id and self.view_content_type_id:
+ view_model = ContentType.objects.get_for_id(self.view_content_type_id).model_class()
+ self.view = view_model._default_manager.get(pk=self.view_object_id)
+ return self.view.render_to_response(request, extra_context)
+ raise Http404
def get_absolute_url(self, request=None, with_domain=False, secure=False):
"""
Node urls will not contain a trailing slash unless a subpath is provided which ends with a trailing slash. Subpaths are expected to begin with a slash, as if returned by :func:`django.core.urlresolvers.reverse`.
+ Because this method will be called frequently and will always try to reverse ``philo-root``, the results of that reversal will be cached by default. This can be disabled by setting :setting:`PHILO_CACHE_PHILO_ROOT` to ``False``.
+
:meth:`construct_url` may raise the following exceptions:
- :class:`NoReverseMatch` if "philo-root" is not reversable -- for example, if :mod:`philo.urls` is not included anywhere in your urlpatterns.
"""
# Try reversing philo-root first, since we can't do anything if that fails.
- root_url = reverse('philo-root')
+ if CACHE_PHILO_ROOT:
+ key = "CACHE_PHILO_ROOT__" + settings.ROOT_URLCONF
+ root_url = cache.get(key)
+ if root_url is None:
+ root_url = reverse('philo-root')
+ cache.set(key, root_url)
+ else:
+ root_url = reverse('philo-root')
try:
current_site = Site.objects.get_current()
#: A generic relation back to nodes.
nodes = generic.GenericRelation(Node, content_type_field='view_content_type', object_id_field='view_object_id')
- #: Property or attribute which defines whether this :class:`View` can handle subpaths. Default: ``False``
+ #: An attribute on the class which defines whether this :class:`View` can handle subpaths. Default: ``False``
accepts_subpath = False
- def handles_subpath(self, subpath):
+ @classmethod
+ def handles_subpath(cls, subpath):
"""Returns True if the :class:`View` handles the given subpath, and False otherwise."""
- if not self.accepts_subpath and subpath != "/":
+ if not cls.accepts_subpath and subpath != "/":
return False
return True
"""Returns urlpatterns that point to views (generally methods on the class). :class:`MultiView`\ s can be thought of as "managing" these subpaths."""
raise NotImplementedError("MultiView subclasses must implement urlpatterns.")
- def handles_subpath(self, subpath):
- if not super(MultiView, self).handles_subpath(subpath):
- return False
- try:
- resolve(subpath, urlconf=self)
- except Http404:
- return False
- return True
-
def actually_render_to_response(self, request, extra_context=None):
"""
Resolves the remaining subpath left after finding this :class:`View`'s node using :attr:`self.urlpatterns <urlpatterns>` and renders the view function (or method) found with the appropriate args and kwargs.
kwargs = dict([(smart_str(k, 'ascii'), v) for k, v in params.items()])
return self.url_or_subpath, args, kwargs
- def get_target_url(self):
- """Calculates and returns the target url based on the :attr:`target_node`, :attr:`url_or_subpath`, and :attr:`reversing_parameters`."""
+ def get_target_url(self, memoize=True):
+ """Calculates and returns the target url based on the :attr:`target_node`, :attr:`url_or_subpath`, and :attr:`reversing_parameters`. The results will be memoized by default; this can be prevented by passing in ``memoize=False``."""
+ if memoize:
+ memo_args = (self.target_node_id, self.url_or_subpath, self.reversing_parameters_json)
+ try:
+ return self._target_url_memo[memo_args]
+ except AttributeError:
+ self._target_url_memo = {}
+ except KeyError:
+ pass
+
node = self.target_node
if node is not None and node.accepts_subpath and self.url_or_subpath:
if self.reversing_parameters is not None:
subpath = self.url_or_subpath
if subpath[0] != '/':
subpath = '/' + subpath
- return node.construct_url(subpath)
+ target_url = node.construct_url(subpath)
elif node is not None:
- return node.get_absolute_url()
+ target_url = node.get_absolute_url()
else:
if self.reversing_parameters is not None:
view_name, args, kwargs = self.get_reverse_params()
- return reverse(view_name, args=args, kwargs=kwargs)
- return self.url_or_subpath
+ target_url = reverse(view_name, args=args, kwargs=kwargs)
+ else:
+ target_url = self.url_or_subpath
+
+ if memoize:
+ self._target_url_memo[memo_args] = target_url
+ return target_url
target_url = property(get_target_url)
class Meta:
git.ithinksw.org / philo.git / blobdiff