made tests compatible with newer django releases

example/db_router.py

@@ -1,4 +1,3 @@
-
 class Router(object):
     TABLE_MAPPINGS = {
         'autocompletionexample_extraspam': 'other',
@@ -11,16 +10,17 @@ def get_db(self, model, **hints):
     db_for_read = db_for_write = get_db
 
     def allow_migrate(self, *args, **hints):
-        # Django 1.8, 1.9 and 1.10 all have different behaviour... sigh
+        # Django 1.8, 1.9, 1.10 and 2.2 all have different behaviour... sigh
         if 'model_name' in hints:
             model_name = hints['model_name']
         elif 'model' in hints:
             model_name = hints['model']._meta.db_table
-        else:
+        elif hasattr(args[1], '_meta'):
             model_name = args[1]._meta.db_table
+        else:
+            model_name = args[1]
 
         return self.TABLE_MAPPINGS.get(model_name, 'default')
 
     def allow_relation(self, obj1, obj2, **hints):
         return True
-

example/tests.py

@@ -33,6 +33,8 @@ class Form(forms.Form):
 
 
 class BaseTestCase(test.TestCase):
+    databases = ['default', 'other']
+
     @transaction.atomic
     def setUp(self):
         self.client = client.Client()

tox.ini

@@ -1,8 +1,10 @@
 [tox]
 envlist = 
     py{py,27}-django11,
-    py35-django{11,20},
-    py36-django{11,20},
+    py35-django{11,21,22},
+    py36-django{11,21,22},
+    py37-django{11,21,22},
+    py38-django{11,21,22},
     flake8,
     docs
 
@@ -12,13 +14,16 @@ usedevelop = True
 [testenv]
 deps = 
     django11: Django<2.0
-    django20: Django>=2.0,<2.1
+    django21: Django>=2.1,<2.2
+    django22: Django>=2.2,<2.3
     -r{toxinidir}/example/requirements.txt
 
 envlist = 
     py{py,27}-django11,
-    py35-django{11,20},
-    py36-django{11,20},
+    py35-django{11,21,22},
+    py36-django{11,21,22},
+    py37-django{11,21,22},
+    py38-django{11,21,22}
 
 commands = 
     python setup.py test