Provisional Django 2.2 LTS update rockstor#2625

Update our Django dependency. It is generally recommended
to only update Django from one LTS to the next: 2.2 LTS
is our next-in-line.

## Includes
- A prior overlooked migration intended to prepare for this
Django update. See:GitHub rockstor#2666 rockstor#2667
- Replace deprecated multi_db with databases 'property':
"RemovedInDjango31Warning: TestCase.multi_db is deprecated."
Which ended up breaking one of our unit tests. And so was
included in this update.

N.B. there remains some Django update warnings but these are
to be addressed in future dedicated issues/commits.

pyproject.toml

@@ -60,7 +60,7 @@ generate-setup-file = false
 python = ">= 3.6, < 3.9"
 
 # [tool.poetry.group.django.dependencies]
-django = "==1.11.29"
+django = "~2.2"
 django-oauth-toolkit = "==1.1.2"
 djangorestframework = "==3.9.3"
 django-pipeline = "==1.7.0" # last version listed with Python 3.6 and Django 1.11 compatibility

src/rockstor/smart_manager/tests/test_snmp.py

@@ -30,7 +30,7 @@
 
 
 class SNMPTests(APITestCase):
-    multi_db = True
+    databases = '__all__'
     # TODO Requires command to reproduce minimal fixture:
     #  "services.json" fixture requires only the smart_manager.service model.
     fixtures = ["test_api.json", "services.json"]

src/rockstor/smart_manager/tests/test_task_scheduler.py

@@ -38,7 +38,7 @@ class TaskSchedulerTests(APITestCase):
     # src/rockstor/storageadmin/fixtures/test_pool_scrub_balance_minimal.json
     #
     # ./bin/test -v 2 -p test_task_scheduler.py
-    multi_db = True
+    databases = '__all__'
     fixtures = ["scheduled_tasks.json"]
     BASE_URL = "/api/sm/tasks"
 

src/rockstor/storageadmin/migrations/0018_auto_20231009_1827.py

@@ -0,0 +1,17 @@
+# Generated by Django 2.2.28 on 2023-10-09 17:27
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('storageadmin', '0017_auto_20230810_1141'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='disk',
+            options={'base_manager_name': 'attached'},
+        ),
+    ]

src/rockstor/storageadmin/tests/test_appliances.py

@@ -32,6 +32,7 @@ class AppliancesTests(APITestMixin):
     fixtures = ["test_api.json", "test_appliances.json"]
     BASE_URL = "/api/appliances"
     client = APIClient()
+    databases = '__all__'
 
     @classmethod
     def setUpClass(cls):

src/rockstor/storageadmin/tests/test_shares.py

@@ -61,7 +61,7 @@
 
 
 class ShareTests(APITestMixin):
-    multi_db = True
+    databases = '__all__'
     fixtures = ["test_api.json", "test_shares.json", "test_shares-services.json"]
     BASE_URL = "/api/shares"