Merge branch 'master' of github.com:brad/django into ticket_18903

AUTHORS

@@ -506,6 +506,7 @@ answer newbie questions, and generally made Django that much better:
     Johan C. Stöver <johan@nilling.nl>
     Nowell Strite <http://nowell.strite.org/>
     Thomas Stromberg <tstromberg@google.com>
+    Travis Swicegood <travis@domain51.com>
     Pascal Varet
     SuperJared
     Radek Švarz <http://www.svarz.cz/translate/>

django/conf/__init__.py

@@ -7,7 +7,6 @@
 """
 
 import os
-import re
 import time     # Needed for Windows
 import warnings
 
@@ -26,7 +25,7 @@ class LazySettings(LazyObject):
     The user can manually configure settings prior to using them. Otherwise,
     Django uses the settings module pointed to by DJANGO_SETTINGS_MODULE.
     """
-    def _setup(self):
+    def _setup(self, name):
         """
         Load the settings module pointed to by the environment variable. This
         is used the first time we need any settings at all, if the user has not
@@ -37,12 +36,21 @@ def _setup(self):
             if not settings_module: # If it's set but is an empty string.
                 raise KeyError
         except KeyError:
-            # NOTE: This is arguably an EnvironmentError, but that causes
-            # problems with Python's interactive help.
-            raise ImportError("Settings cannot be imported, because environment variable %s is undefined." % ENVIRONMENT_VARIABLE)
+            raise ImproperlyConfigured(
+                "Requested setting %s, but settings are not configured. "
+                "You must either define the environment variable %s "
+                "or call settings.configure() before accessing settings."
+                % (name, ENVIRONMENT_VARIABLE))
 
         self._wrapped = Settings(settings_module)
 
+
+    def __getattr__(self, name):
+        if self._wrapped is empty:
+            self._setup(name)
+        return getattr(self._wrapped, name)
+
+
     def configure(self, default_settings=global_settings, **options):
         """
         Called to manually configure the settings. The 'default_settings'

django/contrib/admin/options.py

@@ -14,9 +14,10 @@
 from django.core.paginator import Paginator
 from django.core.urlresolvers import reverse
 from django.db import models, transaction, router
+from django.db.models.constants import LOOKUP_SEP
 from django.db.models.related import RelatedObject
 from django.db.models.fields import BLANK_CHOICE_DASH, FieldDoesNotExist
-from django.db.models.sql.constants import LOOKUP_SEP, QUERY_TERMS
+from django.db.models.sql.constants import QUERY_TERMS
 from django.http import Http404, HttpResponse, HttpResponseRedirect
 from django.shortcuts import get_object_or_404
 from django.template.response import SimpleTemplateResponse, TemplateResponse
@@ -1456,8 +1457,10 @@ def has_delete_permission(self, request, obj=None):
         return request.user.has_perm(
             self.opts.app_label + '.' + self.opts.get_delete_permission())
 
+
 class StackedInline(InlineModelAdmin):
     template = 'admin/edit_inline/stacked.html'
 
+
 class TabularInline(InlineModelAdmin):
     template = 'admin/edit_inline/tabular.html'