X-Git-Url: http://git.ithinksw.org/philo.git/blobdiff_plain/30a08f353e2282b993db3d3079608b0736a2ccb6..ca9342a54be98582d23c0a4e179342efa1005bfc:/utils.py

diff --git a/utils.py b/utils.py
index 5fc3274..6fc2cff 100644
--- a/utils.py
+++ b/utils.py
@@ -1,5 +1,6 @@
 from django.db import models
 from django.contrib.contenttypes.models import ContentType
+from django.core.paginator import Paginator, EmptyPage
 
 
 class ContentTypeLimiter(object):
@@ -40,16 +41,19 @@ class ContentTypeSubclassLimiter(ContentTypeLimiter):
 	
 	def q_object(self):
 		contenttype_pks = []
-		for subclass in self.cls.__subclasses__():
-			try:
-				if issubclass(subclass, models.Model):
-					if not subclass._meta.abstract:
-						if not self.inclusive and subclass is self.cls:
-							continue
-						contenttype = ContentType.objects.get_for_model(subclass)
-						contenttype_pks.append(contenttype.pk)
-			except:
-				pass
+		def handle_subclasses(cls):
+			for subclass in cls.__subclasses__():
+				try:
+					if issubclass(subclass, models.Model):
+						if not subclass._meta.abstract:
+							if not self.inclusive and subclass is self.cls:
+								continue
+							contenttype = ContentType.objects.get_for_model(subclass)
+							contenttype_pks.append(contenttype.pk)
+					handle_subclasses(subclass)
+				except:
+					pass
+		handle_subclasses(self.cls)
 		return models.Q(pk__in=contenttype_pks)
 
 
@@ -59,3 +63,43 @@ def fattr(*args, **kwargs):
 			setattr(function, key, kwargs[key])
 		return function
 	return wrapper
+
+
+def paginate(objects, per_page=None, page_number=1):
+	"""
+	Given a list of objects, return a (paginator, page, objects) tuple.
+	"""
+	try:
+		per_page = int(per_page)
+	except (TypeError, ValueError):
+		# Then either it wasn't set or it was set to an invalid value
+		paginator = page = None
+	else:
+		# There also shouldn't be pagination if the list is too short. Try count()
+		# first - good chance it's a queryset, where count is more efficient.
+		try:
+			if objects.count() <= per_page:
+				paginator = page = None
+		except AttributeError:
+			if len(objects) <= per_page:
+				paginator = page = None
+	
+	try:
+		return paginator, page, objects
+	except NameError:
+		pass
+	
+	paginator = Paginator(objects, per_page)
+	try:
+		page_number = int(page_number)
+	except:
+		page_number = 1
+	
+	try:
+		page = paginator.page(page_number)
+	except EmptyPage:
+		page = None
+	else:
+		objects = page.object_list
+	
+	return paginator, page, objects