Move payment field to membership.

bikeshop_project/core/migrations/0008_auto_20160526_0059.py

@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.4 on 2016-05-26 00:59
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0007_auto_20160501_2253'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='payment',
+            name='membership',
+        ),
+        migrations.AddField(
+            model_name='membership',
+            name='payment',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='core.Payment'),
+        ),
+    ]

bikeshop_project/core/models.py

@@ -6,21 +6,18 @@ class Membership(models.Model):
     created_at = models.DateTimeField(auto_now_add=True)
     modified_at = models.DateTimeField(auto_now=True)
     renewed_at = models.DateTimeField(default=timezone.now)
-    member = models.OneToOneField(
-        'registration.Member',
-        on_delete=models.CASCADE,
-        related_name='membership'
-    )
     self_identification = models.CharField(max_length=255, null=True, blank=True)
     gender = models.CharField(max_length=255, null=True, blank=True)
     involvement = models.CharField(max_length=255, null=True, blank=True)
+    payment = models.ForeignKey(
+        'Payment',
+        on_delete=models.CASCADE,
+        blank=False,
+        null=True
+    )
 
 
 class Payment(models.Model):
-    membership = models.ForeignKey(
-        'Membership',
-        on_delete=models.CASCADE,
-    )
     payment_choices = (
         ('CASH', 'cash'),
         ('CHEQUE', 'cheque'),