Fix django admin for other typeclasses. ChannelDB still requires subscribers to validate. Changed PickleField's clean method to prevent attribute errors for attributes added during basetype setup.

evennia/comms/admin.py

@@ -6,6 +6,7 @@ This defines how Comm models are displayed in the web admin interface.
 from django.contrib import admin
 from evennia.comms.models import ChannelDB
 from evennia.typeclasses.admin import AttributeInline, TagInline
+from django.conf import settings
 
 
 class ChannelAttributeInline(AttributeInline):
@@ -70,4 +71,23 @@ class ChannelAdmin(admin.ModelAdmin):
         """
         return ", ".join([str(sub) for sub in obj.db_subscriptions.all()])
 
+    def save_model(self, request, obj, form, change):
+        """
+        Model-save hook.
+
+        Args:
+            request (Request): Incoming request.
+            obj (Object): Database object.
+            form (Form): Form instance.
+            change (bool): If this is a change or a new object.
+
+        """
+        obj.save()
+        if not change:
+            # adding a new object
+            # have to call init with typeclass passed to it
+            obj.set_class_from_typeclass(typeclass_path=settings.BASE_CHANNEL_TYPECLASS)
+        obj.at_init()
+
+
 admin.site.register(ChannelDB, ChannelAdmin)