Relate UserCardDetail with StripeCustomer and add more fields to uniquely identify if a user already has a card

hosting/migrations/0044_usercarddetail.py

@@ -1,8 +1,7 @@
 # -*- coding: utf-8 -*-
-# Generated by Django 1.9.4 on 2017-10-15 18:05
+# Generated by Django 1.9.4 on 2017-10-15 19:17
 from __future__ import unicode_literals
 
-from django.conf import settings
 from django.db import migrations, models
 import django.db.models.deletion
 import utils.mixins
@@ -11,7 +10,7 @@ import utils.mixins
 class Migration(migrations.Migration):
 
     dependencies = [
-        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('membership', '0006_auto_20160526_0445'),
         ('hosting', '0043_vmdetail'),
     ]
 
@@ -20,11 +19,13 @@ class Migration(migrations.Migration):
             name='UserCardDetail',
             fields=[
                 ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('stripe_customer_id', models.CharField(max_length=100, unique=True)),
                 ('last4', models.CharField(max_length=4)),
                 ('brand', models.CharField(max_length=10)),
+                ('fingerprint', models.CharField(max_length=100)),
+                ('exp_month', models.IntegerField()),
+                ('exp_year', models.IntegerField()),
                 ('preferred', models.BooleanField(default=False)),
-                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='membership.StripeCustomer')),
             ],
             options={
                 'permissions': (('view_usercarddetail', 'View User Card'),),

hosting/models.py

@@ -185,10 +185,12 @@ class VMDetail(models.Model):
 
 class UserCardDetail(AssignPermissionsMixin, models.Model):
     permissions = ('view_usercarddetail',)
-    user = models.ForeignKey(CustomUser)
-    stripe_customer_id = models.CharField(unique=True, max_length=100)
+    user = models.ForeignKey(StripeCustomer)
     last4 = models.CharField(max_length=4)
     brand = models.CharField(max_length=10)
+    fingerprint = models.CharField(max_length=100)
+    exp_month = models.IntegerField(null=False)
+    exp_year = models.IntegerField(null=False)
     preferred = models.BooleanField(default=False)
 
     class Meta: