billing: Create model for customers paying with Stripe.

[greg: reduced migration dependencies, revised commit message.]

zilencer/migrations/0006_customer.py

@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.6 on 2018-01-13 11:54
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('zilencer', '0005_remotepushdevicetoken_fix_uniqueness'),
+        ('zerver', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Customer',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('stripe_customer_id', models.CharField(max_length=255, unique=True)),
+                ('realm', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, to='zerver.Realm')),
+            ],
+        ),
+    ]

zilencer/models.py

@@ -3,7 +3,7 @@ from typing import Text
 
 from django.db import models
 
-import zerver.models
+from zerver.models import AbstractPushDeviceToken, Realm
 
 def get_remote_server_by_uuid(uuid: Text) -> 'RemoteZulipServer':
     return RemoteZulipServer.objects.get(uuid=uuid)
@@ -17,7 +17,7 @@ class RemoteZulipServer(models.Model):
     last_updated = models.DateTimeField('last updated', auto_now=True)  # type: datetime.datetime
 
 # Variant of PushDeviceToken for a remote server.
-class RemotePushDeviceToken(zerver.models.AbstractPushDeviceToken):
+class RemotePushDeviceToken(AbstractPushDeviceToken):
     server = models.ForeignKey(RemoteZulipServer)  # type: RemoteZulipServer
     # The user id on the remote server for this device device this is
     user_id = models.BigIntegerField(db_index=True)  # type: int
@@ -25,3 +25,7 @@ class RemotePushDeviceToken(zerver.models.AbstractPushDeviceToken):
 
     class Meta:
         unique_together = ("server", "token")
+
+class Customer(models.Model):
+    stripe_customer_id = models.CharField(max_length=255, unique=True)
+    realm = models.OneToOneField(Realm)