add custom address field to shop.models.Order and invoice template

src/shop/migrations/0055_order_customer_address.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.1 on 2018-08-22 13:18
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('shop', '0054_auto_20180415_1159'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='order',
+            name='customer_address',
+            field=models.TextField(blank=True, help_text='The additional customer address for this order'),
+        ),
+    ]

src/shop/models.py

@@ -87,6 +87,12 @@ class Order(CreatedUpdatedModel):
         default=True,
     )
 
+    customer_address = models.TextField(
+        help_text=_('The additional customer address for this order'),
+        blank=True
+    )
+
+
     CREDIT_CARD = 'credit_card'
     BLOCKCHAIN = 'blockchain'
     BANK_TRANSFER = 'bank_transfer'

src/shop/templates/pdf/invoice.html

@@ -14,7 +14,12 @@
         </td>
     </tr>
 </table>
+{% if invoice.order.customer_address %}
+<h2>CUSTOMER</h2>
+<p class="lead">{{ invoice.order.customer_address|linebreaks }}</p>
+{% else %}
 <h3>Customer: {{ invoice.order.user.email }}</h3>
+{% endif %}
 <br>
 <h2>INVOICE</h2>
 <table style="width:90%; margin:1em;">