Django - Add Infractions API (#149)

* add Infraction model and serialiser

The model in not finalised.

* fix mix up of serialiser fields

* remove explicit id field and add foreign keys

* remove unused import

* disallow null for user

* add view set and route

* fix model and create migration

* fix typo choice => choices
* specify names for reverse accessors for User FKs

* add django-filter

* add filters to view set

* add string dunder method to model

* add list/retrieve tests

* make reason nullable

* add creation tests

* remove support for PUT and DELETE

* add support for PATCH

* assert timestamps using strings rather than datetimes

This is done to keep 3.6 support; datetime.fromisoformat() is 3.7+

* assert inserted_at

* add unauthenticated tests

* add bad value tests for list filters and retrieve

* remove prefetch cache invalidation

* make __str__ more descriptive

* add field validation & remove note type

* add tests for field validation

* fix coverage for Infraction string dunder test

* fix coverage (for sure this time)

* return 400 for partial updates with frozen fields

* add expanded serialiser and endpoints

* test expanded endpoints

* remove extra retrieve call

* remove unnecessary try-finally blocks

* remove extra blank line

* document endpoints (except expanded)

* document expanded routes

* fix wrong routes in docstring (/infraction -> /infractions)

* make merge migration

1 files changed, 17 insertions, 6 deletions

diff --git a/api/tests/test_models.py b/api/tests/test_models.py
index 2e606801..1419a7d7 100644
--- a/api/tests/test_models.py
+++ b/api/tests/test_models.py
@@ -1,9 +1,11 @@
+from datetime import datetime as dt, timezone
+
 from django.test import SimpleTestCase
 
 from ..models import (
-    DocumentationLink, ModelReprMixin,
-    OffTopicChannelName, Role,
-    SnakeFact, SnakeIdiom,
+    DocumentationLink, Infraction,
+    ModelReprMixin, OffTopicChannelName,
+    Role, SnakeFact, SnakeIdiom,
     SnakeName, SpecialSnake,
     Tag, User
 )
@@ -41,13 +43,22 @@ class StringDunderMethodTests(SimpleTestCase):
                 id=5, name='test role',
                 colour=0x5, permissions=0
             ),
+            Tag(
+                title='bob',
+                embed={'content': "the builder"}
+            ),
             User(
                 id=5, name='bob',
                 discriminator=1, avatar_hash=None
             ),
-            Tag(
-                title='bob',
-                embed={'content': "the builder"}
+            Infraction(
+                user_id=5, actor_id=5,
+                type='kick', reason='He terk my jerb!'
+            ),
+            Infraction(
+                user_id=5, actor_id=5, hidden=True,
+                type='kick', reason='He terk my jerb!',
+                expires_at=dt(5018, 11, 20, 15, 52, tzinfo=timezone.utc)
             )
         )