Add ModelWithFieldAttributes *before* PolyModel, so that everything does not
become a "ModelWithFieldAttributes" in the Datastore.
The way PolyModel works, each Model class hierarchy is stored in the Datastore
as the class that directly inherited from PolyModel. So, we do not want to
insert ModelWithFieldAttributes *after* PolyModel by inheriting *from*
PolyModel, or everything would just be a ModelWithFieldAttributes in the
Datastore, instead of Person, Work, Group, etc.
# Wrapper for loading templates from eggs via pkg_resources.resource_string.
try:
from pkg_resources import resource_string
except ImportError:
resource_string = None
from django.template import TemplateDoesNotExist
from django.conf import settings
def load_template_source(template_name, template_dirs=None):
"""
Loads templates from Python eggs via pkg_resource.resource_string.
For every installed app, it tries to get the resource (app, template_name).
"""
if resource_string is not None:
pkg_name = 'templates/' + template_name
for app in settings.INSTALLED_APPS:
try:
return (resource_string(app, pkg_name).decode(settings.FILE_CHARSET), 'egg:%s:%s' % (app, pkg_name))
except:
pass
raise TemplateDoesNotExist, template_name
load_template_source.is_usable = resource_string is not None