Fix some model weirdness

customers/migrations/0004_auto_20170506_1203.py

@@ -0,0 +1,42 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11 on 2017-05-06 19:03
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('products', '0005_auto_20170415_1656'),
+        ('customers', '0003_purchasitem'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='PurchaseItem',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('quanity', models.IntegerField(default=1)),
+                ('product', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='products.Product')),
+                ('purchase', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='customers.Purchase')),
+            ],
+        ),
+        migrations.RemoveField(
+            model_name='purchasitem',
+            name='product',
+        ),
+        migrations.RemoveField(
+            model_name='purchasitem',
+            name='purchase',
+        ),
+        migrations.DeleteModel(
+            name='PurchasItem',
+        ),
+        migrations.AddField(
+            model_name='purchase',
+            name='items',
+            field=models.ManyToManyField(through='customers.PurchaseItem', to='products.Product'),
+        ),
+    ]

customers/models.py

@@ -25,9 +25,10 @@ class Purchase(models.Model):
     discount_code = models.CharField(blank=True, default='', max_length=20)
     total = models.DecimalField(max_digits=9, decimal_places=2)
     shipped = models.BooleanField(default=False)
+    items = models.ManyToManyField('products.Product', through='PurchaseItem')
 
 
-class PurchasItem(models.Model):
+class PurchaseItem(models.Model):
     product = models.ForeignKey('products.Product')
-    purchase = models.ForeignKey(Purchase, related_name='items')
+    purchase = models.ForeignKey(Purchase)
     quanity = models.IntegerField(default=1)