1. Fixed bulk_update testing issue for django 2.1

2. Added python 3.8 and django 3.0 to travis testing
3. Split requirements.txt and requirements-test.txt

.travis.yml

@@ -33,6 +33,7 @@ addons:
 python:
   - 3.6
   - 3.7
+  - 3.8
 
 env:
   - PG=9.6 DJANGO=2.1
@@ -41,6 +42,9 @@ env:
   - PG=9.6 DJANGO=2.2
   - PG=10 DJANGO=2.2
   - PG=11 DJANGO=2.2
+  - PG=9.6 DJANGO=3.0
+  - PG=10 DJANGO=3.0
+  - PG=11 DJANGO=3.0
 
 before_install:
   # Use default PostgreSQL 11 port
@@ -60,9 +64,8 @@ install:
   - sudo apt-get install clickhouse-client clickhouse-server clickhouse-common-static
   - sudo service clickhouse-server restart
 
-  - pip install -r requirements.txt
+  - pip install -r requirements-test.txt
   - pip install -q Django==$DJANGO.*
-  - pip install redis
   - python setup.py -q install
 
 before_script:

requirements-test.txt

@@ -0,0 +1,11 @@
+Django (>=1.7)
+pytz
+six
+typing
+psycopg2
+infi.clickhouse-orm
+celery
+statsd
+django-pg-returning
+django-pg-bulk-update
+redis

requirements.txt

@@ -5,5 +5,4 @@ typing
 psycopg2
 infi.clickhouse-orm
 celery
-statsd
+statsd
-django-pg-returning

src/django_clickhouse/models.py

@@ -74,7 +74,7 @@ class ClickHouseSyncBulkUpdateQuerySetMixin(ClickHouseSyncRegisterMixin, BulkUpd
 
     def _decorate_method(self, name: str, operation: str, args, kwargs):
         if not hasattr(super(), name):
-            raise AttributeError(name)
+            raise AttributeError("QuerySet has no attribute %s. Is django-pg-bulk-update library installed?" % name)
 
         func = getattr(super(), name)
         original_returning = kwargs.pop('returning', None)

tests/test_models.py

@@ -1,5 +1,7 @@
 import datetime
+from unittest import skipIf
 
+import django
 from django.test import TransactionTestCase
 from django.utils.timezone import now
 
@@ -61,6 +63,7 @@ class TestOperations(TransactionTestCase):
         self.assertSetEqual({('insert', "%s.%d" % (self.db_alias, instance.pk)) for instance in items},
                             set(self.storage.get_operations(self.clickhouse_model.get_import_key(), 10)))
 
+    @skipIf(django.VERSION < (2, 2), "bulk_update method has been introduced in django 2.2")
     def test_native_bulk_update(self):
         items = list(self.django_model.objects.filter(pk__in={1, 2}))
         for instance in items: