/django/contrib/contenttypes/views.py
https://code.google.com/p/mango-py/ · Python · 71 lines · 49 code · 9 blank · 13 comment · 27 complexity · deeda1cbd920ee0e6c95d200f7f1d31f MD5 · raw file
- from django import http
- from django.contrib.contenttypes.models import ContentType
- from django.contrib.sites.models import Site, get_current_site
- from django.core.exceptions import ObjectDoesNotExist
- def shortcut(request, content_type_id, object_id):
- "Redirect to an object's page based on a content-type ID and an object ID."
- # Look up the object, making sure it's got a get_absolute_url() function.
- try:
- content_type = ContentType.objects.get(pk=content_type_id)
- if not content_type.model_class():
- raise http.Http404("Content type %s object has no associated model" % content_type_id)
- obj = content_type.get_object_for_this_type(pk=object_id)
- except (ObjectDoesNotExist, ValueError):
- raise http.Http404("Content type %s object %s doesn't exist" % (content_type_id, object_id))
- try:
- absurl = obj.get_absolute_url()
- except AttributeError:
- raise http.Http404("%s objects don't have get_absolute_url() methods" % content_type.name)
- # Try to figure out the object's domain, so we can do a cross-site redirect
- # if necessary.
- # If the object actually defines a domain, we're done.
- if absurl.startswith('http://') or absurl.startswith('https://'):
- return http.HttpResponseRedirect(absurl)
- # Otherwise, we need to introspect the object's relationships for a
- # relation to the Site object
- object_domain = None
- if Site._meta.installed:
- opts = obj._meta
- # First, look for an many-to-many relationship to Site.
- for field in opts.many_to_many:
- if field.rel.to is Site:
- try:
- # Caveat: In the case of multiple related Sites, this just
- # selects the *first* one, which is arbitrary.
- object_domain = getattr(obj, field.name).all()[0].domain
- except IndexError:
- pass
- if object_domain is not None:
- break
- # Next, look for a many-to-one relationship to Site.
- if object_domain is None:
- for field in obj._meta.fields:
- if field.rel and field.rel.to is Site:
- try:
- object_domain = getattr(obj, field.name).domain
- except Site.DoesNotExist:
- pass
- if object_domain is not None:
- break
- # Fall back to the current site (if possible).
- if object_domain is None:
- try:
- object_domain = get_current_site(request).domain
- except Site.DoesNotExist:
- pass
- # If all that malarkey found an object domain, use it. Otherwise, fall back
- # to whatever get_absolute_url() returned.
- if object_domain is not None:
- protocol = request.is_secure() and 'https' or 'http'
- return http.HttpResponseRedirect('%s://%s%s' % (protocol, object_domain, absurl))
- else:
- return http.HttpResponseRedirect(absurl)