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from django import http
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from django.contrib.contenttypes.models import ContentType
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from django.contrib.sites.models import Site
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from django.core.exceptions import ObjectDoesNotExist
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def shortcut(request, content_type_id, object_id):
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"Redirect to an object's page based on a content-type ID and an object ID."
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# Look up the object, making sure it's got a get_absolute_url() function.
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content_type = ContentType.objects.get(pk=content_type_id)
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obj = content_type.get_object_for_this_type(pk=object_id)
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except ObjectDoesNotExist:
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raise http.Http404("Content type %s object %s doesn't exist" % (content_type_id, object_id))
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absurl = obj.get_absolute_url()
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except AttributeError:
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raise http.Http404("%s objects don't have get_absolute_url() methods" % content_type.name)
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# Try to figure out the object's domain, so we can do a cross-site redirect
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# If the object actually defines a domain, we're done.
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if absurl.startswith('http://') or absurl.startswith('https://'):
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return http.HttpResponseRedirect(absurl)
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# Otherwise, we need to introspect the object's relationships for a
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# relation to the Site object
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# First, look for an many-to-many relationship to Site.
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for field in opts.many_to_many:
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if field.rel.to is Site:
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# Caveat: In the case of multiple related Sites, this just
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# selects the *first* one, which is arbitrary.
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object_domain = getattr(obj, field.name).all()[0].domain
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if object_domain is not None:
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# Next, look for a many-to-one relationship to Site.
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if object_domain is None:
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for field in obj._meta.fields:
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if field.rel and field.rel.to is Site:
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object_domain = getattr(obj, field.name).domain
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except Site.DoesNotExist:
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if object_domain is not None:
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# Fall back to the current site (if possible).
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if object_domain is None:
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object_domain = Site.objects.get_current().domain
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except Site.DoesNotExist:
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# If all that malarkey found an object domain, use it. Otherwise, fall back
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# to whatever get_absolute_url() returned.
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if object_domain is not None:
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protocol = request.is_secure() and 'https' or 'http'
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return http.HttpResponseRedirect('%s://%s%s' % (protocol, object_domain, absurl))
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return http.HttpResponseRedirect(absurl)