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.contrib.sites.models import Site, RequestSite
+from django.http import HttpResponse, HttpResponseServerError, HttpResponseRedirect, Http404
+from django.core.exceptions import ValidationError
from django.core.servers.basehttp import FileWrapper
-from django.core.urlresolvers import resolve, clear_url_caches
+from django.core.urlresolvers import resolve, clear_url_caches, reverse, NoReverseMatch
from django.template import add_to_builtins as register_templatetags
from inspect import getargspec
+from philo.exceptions import MIDDLEWARE_NOT_CONFIGURED
from philo.models.base import TreeEntity, Entity, QuerySetMapper, register_value_model
+from philo.models.fields import JSONField
from philo.utils import ContentTypeSubclassLimiter
from philo.validators import RedirectValidator
-from philo.exceptions import ViewDoesNotProvideSubpaths
+from philo.exceptions import ViewCanNotProvideSubpath, ViewDoesNotProvideSubpaths, AncestorDoesNotExist
+from philo.signals import view_about_to_render, view_finished_rendering
_view_content_type_limiter = ContentTypeSubclassLimiter(None)
return self.view.accepts_subpath
return False
- def render_to_response(self, request, path=None, subpath=None, extra_context=None):
- return self.view.render_to_response(self, request, path, subpath, extra_context)
+ def handles_subpath(self, subpath):
+ return self.view.handles_subpath(subpath)
+
+ def render_to_response(self, request, extra_context=None):
+ return self.view.render_to_response(request, extra_context)
+
+ def get_absolute_url(self, request=None, with_domain=False, secure=False):
+ return self.construct_url(request=request, with_domain=with_domain, secure=secure)
+
+ def construct_url(self, subpath="/", request=None, with_domain=False, secure=False):
+ """
+ This method will construct a URL based on the Node's location.
+ If a request is passed in, that will be used as a backup in case
+ the Site lookup fails. The Site lookup takes precedence because
+ it's what's used to find the root node. This will raise:
+ - NoReverseMatch if philo-root is not reverseable
+ - Site.DoesNotExist if a domain is requested but not buildable.
+ - AncestorDoesNotExist if the root node of the site isn't an
+ ancestor of this instance.
+ """
+ # Try reversing philo-root first, since we can't do anything if that fails.
+ root_url = reverse('philo-root')
+
+ try:
+ current_site = Site.objects.get_current()
+ except Site.DoesNotExist:
+ if request is not None:
+ current_site = RequestSite(request)
+ elif with_domain:
+ # If they want a domain and we can't figure one out,
+ # best to reraise the error to let them know.
+ raise
+ else:
+ current_site = None
+
+ root = getattr(current_site, 'root_node', None)
+ path = self.get_path(root=root)
+
+ if current_site and with_domain:
+ domain = "http%s://%s" % (secure and "s" or "", current_site.domain)
+ else:
+ domain = ""
+
+ if not path or subpath == "/":
+ subpath = subpath[1:]
+
+ return '%s%s%s%s' % (domain, root_url, path, subpath)
class Meta:
app_label = 'philo'
accepts_subpath = False
- def get_subpath(self, obj):
- raise ViewDoesNotProvideSubpaths
+ def handles_subpath(self, subpath):
+ if not self.accepts_subpath and subpath != "/":
+ return False
+ return True
+
+ def reverse(self, view_name=None, args=None, kwargs=None, node=None, obj=None):
+ """Shortcut method to handle the common pattern of getting the
+ absolute url for a view's subpaths."""
+ if not self.accepts_subpath:
+ raise ViewDoesNotProvideSubpaths
+
+ if obj is not None:
+ # Perhaps just override instead of combining?
+ obj_view_name, obj_args, obj_kwargs = self.get_reverse_params(obj)
+ if view_name is None:
+ view_name = obj_view_name
+ args = list(obj_args) + list(args or [])
+ obj_kwargs.update(kwargs or {})
+ kwargs = obj_kwargs
+
+ try:
+ subpath = reverse(view_name, urlconf=self, args=args or [], kwargs=kwargs or {})
+ except NoReverseMatch, e:
+ raise ViewCanNotProvideSubpath(e.message)
+
+ if node is not None:
+ return node.construct_url(subpath)
+ return subpath
+
+ def get_reverse_params(self, obj):
+ """This method should return a view_name, args, kwargs tuple suitable for reversing a url for the given obj using self as the urlconf."""
+ raise NotImplementedError("View subclasses must implement get_reverse_params to support subpaths.")
def attributes_with_node(self, node):
return QuerySetMapper(self.attribute_set, passthrough=node.attributes)
- def relationships_with_node(self, node):
- return QuerySetMapper(self.relationship_set, passthrough=node.relationships)
+ def render_to_response(self, request, extra_context=None):
+ if not hasattr(request, 'node'):
+ raise MIDDLEWARE_NOT_CONFIGURED
+
+ extra_context = extra_context or {}
+ view_about_to_render.send(sender=self, request=request, extra_context=extra_context)
+ response = self.actually_render_to_response(request, extra_context)
+ view_finished_rendering.send(sender=self, response=response)
+ return response
- def render_to_response(self, node, request, path=None, subpath=None, extra_context=None):
- raise NotImplementedError('View subclasses must implement render_to_response.')
+ def actually_render_to_response(self, request, extra_context=None):
+ raise NotImplementedError('View subclasses must implement actually_render_to_response.')
class Meta:
abstract = True
class MultiView(View):
accepts_subpath = True
- urlpatterns = []
+ @property
+ def urlpatterns(self):
+ 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 render_to_response(self, node, request, path=None, subpath=None, extra_context=None):
+ def actually_render_to_response(self, request, extra_context=None):
clear_url_caches()
- if not subpath:
- subpath = ""
- subpath = "/" + subpath
+ subpath = request.node.subpath
view, args, kwargs = resolve(subpath, urlconf=self)
- view_args = getargspec(view)[0]
- if extra_context is not None and 'extra_context' in view_args:
+ view_args = getargspec(view)
+ if extra_context is not None and ('extra_context' in view_args[0] or view_args[2] is not None):
if 'extra_context' in kwargs:
extra_context.update(kwargs['extra_context'])
kwargs['extra_context'] = extra_context
- if 'node' in view_args:
- kwargs['node'] = node
return view(request, *args, **kwargs)
+ def get_context(self):
+ """Hook for providing instance-specific context - such as the value of a Field - to all views."""
+ return {}
+
+ def basic_view(self, field_name):
+ """
+ Given the name of a field on ``self``, accesses the value of
+ that field and treats it as a ``View`` instance. Creates a
+ basic context based on self.get_context() and any extra_context
+ that was passed in, then calls the ``View`` instance's
+ render_to_response() method. This method is meant to be called
+ to return a view function appropriate for urlpatterns.
+ """
+ field = self._meta.get_field(field_name)
+ view = getattr(self, field.name, None)
+
+ def inner(request, extra_context=None, **kwargs):
+ if not view:
+ raise Http404
+ context = self.get_context()
+ context.update(extra_context or {})
+ return view.render_to_response(request, extra_context=context)
+
+ return inner
+
+ class Meta:
+ abstract = True
+
+
+class TargetURLModel(models.Model):
+ target_node = models.ForeignKey(Node, blank=True, null=True, related_name="%(app_label)s_%(class)s_related")
+ url_or_subpath = models.CharField(max_length=200, validators=[RedirectValidator()], blank=True, help_text="Point to this url or, if a node is defined and accepts subpaths, this subpath of the node.")
+ reversing_parameters = JSONField(blank=True, help_text="If reversing parameters are defined, url_or_subpath will instead be interpreted as the view name to be reversed.")
+
+ def clean(self):
+ # Should this be enforced? Not enforcing it would allow creation of "headers" in the navbar.
+ if not self.target_node and not self.url_or_subpath:
+ raise ValidationError("Either a target node or a url must be defined.")
+
+ if self.reversing_parameters and not (self.url_or_subpath or self.target_node):
+ raise ValidationError("Reversing parameters require either a view name or a target node.")
+
+ try:
+ self.get_target_url()
+ except (NoReverseMatch, ViewCanNotProvideSubpath), e:
+ raise ValidationError(e.message)
+
+ super(TargetURLModel, self).clean()
+
+ def get_reverse_params(self):
+ params = self.reversing_parameters
+ args = kwargs = None
+ if isinstance(params, list):
+ args = params
+ elif isinstance(params, dict):
+ # Convert unicode keys to strings for Python < 2.6.5. Compare
+ # http://stackoverflow.com/questions/4598604/how-to-pass-unicode-keywords-to-kwargs
+ kwargs = {}
+ for key, val in params.items():
+ if isinstance(key, unicode):
+ key = str(key)
+ kwargs[key] = val
+ return self.url_or_subpath, args, kwargs
+
+ def get_target_url(self):
+ 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:
+ view_name, args, kwargs = self.get_reverse_params()
+ subpath = node.view.reverse(view_name, args=args, kwargs=kwargs)
+ else:
+ subpath = self.url_or_subpath
+ if subpath[0] != '/':
+ subpath = '/' + subpath
+ return node.construct_url(subpath)
+ elif node is not None:
+ return 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 = property(get_target_url)
+
class Meta:
abstract = True
-class Redirect(View):
+class Redirect(View, TargetURLModel):
STATUS_CODES = (
(302, 'Temporary'),
(301, 'Permanent'),
)
- 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, node, request, path=None, subpath=None, extra_context=None):
- response = HttpResponseRedirect(self.target)
+ def actually_render_to_response(self, request, extra_context=None):
+ response = HttpResponseRedirect(self.target_url)
response.status_code = self.status_code
return response
mimetype = models.CharField(max_length=255)
file = models.FileField(upload_to='philo/files/%Y/%m/%d')
- def render_to_response(self, node, request, path=None, subpath=None, extra_context=None):
+ def actually_render_to_response(self, request, extra_context=None):
wrapper = FileWrapper(self.file)
response = HttpResponse(wrapper, content_type=self.mimetype)
response['Content-Length'] = self.file.size
git.ithinksw.org / philo.git / blobdiff