Merge pull request #175 from monzo/mattrco/comms-channel-dupe

Enforce 1-to-1 relation between Incident and Comms Channel

Author: mattrco

response/migrations/0012_commschannel_onetoone.py

@@ -0,0 +1,19 @@
+# Generated by Django 2.2.3 on 2019-10-24 14:55
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [("response", "0011_auto_20190927_1339")]
+
+    operations = [
+        migrations.AlterField(
+            model_name="commschannel",
+            name="incident",
+            field=models.OneToOneField(
+                on_delete=django.db.models.deletion.CASCADE, to="response.Incident"
+            ),
+        )
+    ]

response/slack/models/comms_channel.py

@@ -59,7 +59,7 @@ def create_comms_channel(self, incident):
 class CommsChannel(models.Model):
 
     objects = CommsChannelManager()
-    incident = models.ForeignKey(Incident, on_delete=models.CASCADE)
+    incident = models.OneToOneField(Incident, on_delete=models.CASCADE)
     channel_id = models.CharField(max_length=20, null=False)
     channel_name = models.CharField(max_length=80, null=False)
 

setup.py

@@ -3,7 +3,7 @@
 
 from setuptools import find_packages, setup
 
-VERSION = "0.1.19"
+VERSION = "0.1.20"
 
 INSTALL_REQUIRES = [
     "Django>=2.2",