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Changes between Initial Version and Version 1 of Ticket #29564

-              initial
+              v1
+}
 DATABASE_ROUTERS = ['myapplication.routers.AuthRouter']
+...
 }}}
 Following your example [https://docs.djangoproject.com/en/2.0/topics/db/multi-db/#topics-db-multi-db-routing],
 I created a router.py, in which I replicated your code.
+However, being aware of the cross-database problem, my routers.py looks like this:
+{{{
+class AuthRouter(object):
+    auth_related = (
+            'auth',
+            'admin',
+            'contenttypes',
+            'sessions',
+    )
+    def db_for_read(self, model, **hints):
+        if model._meta.app_label in self.auth_related:
+            return 'users'
+        return None
+    def db_for_write(self, model, **hints):
+        if model._meta.app_label in self.auth_related:
+            return 'users'
+        return None
+    def allow_relation(self, obj1, obj2, **hints):
+        if obj1._meta.app_label in self.auth_related or \
+           obj2._meta.app_label in self.auth_related:
+            return True
+        return None
+    def allow_migrate(self, db, app_label, model_name=None, **hints):
+        if app_label in self.auth_related:
+            return db == 'users'
+        return None
+}}}
 Then: