make it possible to have customorders and invoices without Danish VAT

src/shop/migrations/0049_auto_20170914_2034.py

@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.5 on 2017-09-14 18:34
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('shop', '0048_product_ticket_type'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='customorder',
+            name='danish_vat',
+            field=models.BooleanField(default=True, help_text='Danish VAT?'),
+        ),
+        migrations.AlterField(
+            model_name='customorder',
+            name='paid',
+            field=models.BooleanField(default=False, help_text='Check when this custom order has been paid (or if it gets cancelled out by a Credit Note)', verbose_name='Paid?'),
+        ),
+    ]

src/shop/models.py

@@ -41,16 +41,24 @@ class CustomOrder(CreatedUpdatedModel):
 
     paid = models.BooleanField(
         verbose_name=_('Paid?'),
-        help_text=_('Whether this custom order has been paid.'),
+        help_text=_('Check when this custom order has been paid (or if it gets cancelled out by a Credit Note)'),
         default=False,
     )
 
+    danish_vat = models.BooleanField(
+        help_text="Danish VAT?",
+        default=True
+    )
+
     def __str__(self):
         return 'custom order id #%s' % self.pk
 
     @property
     def vat(self):
-        return Decimal(round(self.amount*Decimal(0.2), 2))
+        if self.danish_vat:
+            return Decimal(round(self.amount*Decimal(0.2), 2))
+        else:
+            return 0
 
 
 class Order(CreatedUpdatedModel):

src/shop/templates/pdf/custominvoice.html

@@ -34,7 +34,11 @@
 
   <tr>
     <td align="right">
+      {% if invoice.customorder.danish_vat %}
       <strong>Danish VAT (25%)</strong>
+      {% else %}
+      <strong>No VAT</strong>
+      {% endif %}
     <td align="right">
       {{ invoice.customorder.vat|currency }}