Update the example app to demonstrate the polymorphic admin

This really begs for a separate folder, but I leave that to a new commit
for now.

pexp/admin.py

@@ -0,0 +1,63 @@
+from django.contrib import admin
+from polymorphic.admin import PolymorphicParentModelAdmin, PolymorphicChildModelAdmin
+from pexp.models import *
+
+
+class ProjectChildAdmin(PolymorphicChildModelAdmin):
+    base_model = Project
+
+class ProjectAdmin(PolymorphicParentModelAdmin):
+    base_model = Project
+    child_models = (
+        (Project, ProjectChildAdmin),
+        (ArtProject, ProjectChildAdmin),
+        (ResearchProject, ProjectChildAdmin),
+    )
+
+admin.site.register(Project, ProjectAdmin)
+
+
+
+class ModelAChildAdmin(PolymorphicChildModelAdmin):
+    base_model = ModelA
+
+class ModelAAdmin(PolymorphicParentModelAdmin):
+    base_model = ModelA
+    child_models = (
+        (ModelA, ModelAChildAdmin),
+        (ModelB, ModelAChildAdmin),
+        (ModelC, ModelAChildAdmin),
+    )
+
+admin.site.register(ModelA, ModelAAdmin)
+
+
+if 'Model2A' in globals():
+    class Model2AChildAdmin(PolymorphicChildModelAdmin):
+        base_model = Model2A
+
+    class Model2AAdmin(PolymorphicParentModelAdmin):
+        base_model = Model2A
+        child_models = (
+            (Model2A, Model2AChildAdmin),
+            (Model2B, Model2AChildAdmin),
+            (Model2C, Model2AChildAdmin),
+        )
+
+    admin.site.register(Model2A, Model2AAdmin)
+
+
+if 'UUIDModelA' in globals():
+    class UUIDModelAChildAdmin(PolymorphicChildModelAdmin):
+        base_model = UUIDModelA
+
+    class UUIDModelAAdmin(PolymorphicParentModelAdmin):
+        base_model = UUIDModelA
+        child_models = (
+            (UUIDModelA, UUIDModelAChildAdmin),
+            (UUIDModelB, UUIDModelAChildAdmin),
+            (UUIDModelC, UUIDModelAChildAdmin),
+        )
+
+    admin.site.register(UUIDModelA, UUIDModelAAdmin)
+

settings.py

@@ -77,9 +77,12 @@ MIDDLEWARE_CLASSES = (
     'django.middleware.common.CommonMiddleware',
     'django.contrib.sessions.middleware.SessionMiddleware',
     'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'django.contrib.messages.middleware.MessageMiddleware',
 )
 
-ROOT_URLCONF = ''
+ROOT_URLCONF = 'urls'
+STATIC_URL = '/static/'
+ADMIN_MEDIA_PREFIX = '/static/admin/'  # 1.3 compatibility
 
 TEMPLATE_DIRS = (
     # Put strings here, like "/home/html/django_templates" or "C:/www/django/templates".
@@ -88,10 +91,14 @@ TEMPLATE_DIRS = (
 )
 
 INSTALLED_APPS = (
-    #'django.contrib.auth',
+    'django.contrib.auth',
+    'django.contrib.admin',
     'django.contrib.contenttypes',
-    #'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.sessions',
+    'django.contrib.staticfiles',
+
     #'django.contrib.sites',
-    'polymorphic',      # only needed if you want to use polymorphic_dumpdata
+    'polymorphic',      # needed if you want to use the polymorphic admin
     'pexp',             # this Django app is for testing and experimentation; not needed otherwise
 )

urls.py

@@ -0,0 +1,10 @@
+from django.conf import settings
+from django.conf.urls.defaults import patterns, include, url
+from django.conf.urls.static import static
+from django.contrib import admin
+
+admin.autodiscover()
+
+urlpatterns = patterns('',
+    url(r'^admin/', include(admin.site.urls)),
+)