Fix #26

shop/admin.py

@@ -45,6 +45,7 @@ class OrderAdmin(admin.ModelAdmin):
         'camp',
         'payment_method',
         'paid',
+        'cancelled',
     ]
 
     list_filter = [

shop/managers.py

@@ -11,3 +11,21 @@ class ProductQuerySet(QuerySet):
         return self.filter(
             available_in__contains=DateTimeTZRange(now, None)
         )
+
+
+class OrderQuerySet(QuerySet):
+
+    def not_cancelled(self):
+        return self.filter(cancelled=False)
+
+    def open(self):
+        return self.filter(open__isnull=True)
+
+    def paid(self):
+        return self.filter(paid=True)
+
+    def unpaid(self):
+        return self.filter(paid=False)
+
+    def cancelled(self):
+        return self.filter(cancelled=True)

shop/migrations/0023_order_cancelled.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.6 on 2016-06-01 08:53
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('shop', '0022_auto_20160530_2301'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='order',
+            name='cancelled',
+            field=models.BooleanField(default=False),
+        ),
+    ]

shop/models.py

@@ -8,7 +8,7 @@ from django.utils.translation import ugettext_lazy as _
 from django.utils import timezone
 from django.core.urlresolvers import reverse_lazy
 from utils.models import UUIDModel, CreatedUpdatedModel
-from .managers import ProductQuerySet
+from .managers import ProductQuerySet, OrderQuerySet
 import hashlib, io, base64, qrcode
 from decimal import Decimal
 from datetime import timedelta
@@ -72,6 +72,10 @@ class Order(CreatedUpdatedModel):
         default=BLOCKCHAIN
     )
 
+    cancelled = models.BooleanField(default=False)
+
+    objects = OrderQuerySet.as_manager()
+
     def __str__(self):
         return 'order id #%s' % self.pk
 
@@ -160,6 +164,11 @@ class Order(CreatedUpdatedModel):
         else:
             return False
 
+    def mark_as_cancelled(self):
+        self.cancelled = True
+        self.open = None
+        self.save()
+
 
 class ProductCategory(CreatedUpdatedModel, UUIDModel):
     class Meta:

shop/templates/order_detail.html

@@ -6,7 +6,7 @@
 
 <h1>Order #{{ order.id }}</h1>
 
-{% if not order.open == None %}
+{% if not order.paid %}
 <form method="POST" class="form-inline">
   {% csrf_token %}
 {% endif %}
@@ -67,7 +67,10 @@
 
 {% if not order.open == None %}
     {% bootstrap_button "Update order" button_type="submit" button_class="btn-primary" name="update_order" %}
-  {% bootstrap_button "Cancel order" button_type="submit" button_class="btn-danger pull-right" name="cancel_order" %}
+{% endif %}
+
+{% if not order.paid %}
+  {% bootstrap_button "Cancel order" button_type="submit" button_class="btn-danger" name="cancel_order" %}
 {% endif %}
 
 <hr />

shop/views.py

@@ -106,6 +106,22 @@ class EnsureOrderHasProductsMixin(SingleObjectMixin):
         )
 
 
+class EnsureOrderIsNotCancelledMixin(SingleObjectMixin):
+    model = Order
+
+    def dispatch(self, request, *args, **kwargs):
+        if self.get_object().cancelled:
+            messages.error(
+                request,
+                'Order #{} is cancelled!'.format(self.get_object().id)
+            )
+            return HttpResponseRedirect(reverse_lazy('shop:index'))
+
+        return super(EnsureOrderHasProductsMixin, self).dispatch(
+            request, *args, **kwargs
+        )
+
+
 class EnsureOrderHasInvoicePDFMixin(SingleObjectMixin):
     model = Order
 
@@ -217,14 +233,20 @@ class ProductDetailView(FormView, DetailView):
 class OrderListView(LoginRequiredMixin, ListView):
     model = Order
     template_name = "order_list.html"
+    context_object_name = 'orders'
 
-    def get_context_data(self, **kwargs):
-        context = super(OrderListView, self).get_context_data(**kwargs)
-        context['orders'] = Order.objects.filter(user=self.request.user)
-        return context
+    def get_queryset(self):
+        queryset = super(OrderListView, self).get_queryset()
+        return queryset.filter(user=self.request.user).not_cancelled()
 
 
-class OrderDetailView(LoginRequiredMixin, EnsureUserOwnsOrderMixin, EnsureOrderHasProductsMixin, DetailView):
+class OrderDetailView(
+    LoginRequiredMixin,
+    EnsureUserOwnsOrderMixin,
+    EnsureOrderHasProductsMixin,
+    EnsureOrderIsNotCancelledMixin,
+    DetailView
+):
     model = Order
     template_name = 'order_detail.html'
     context_object_name = 'order'
@@ -269,12 +291,12 @@ class OrderDetailView(LoginRequiredMixin, EnsureUserOwnsOrderMixin, EnsureOrderH
         if product_remove:
             order.orderproductrelation_set.filter(pk=product_remove).delete()
             if not order.products.count() > 0:
-                order.delete()
+                order.mark_as_cancelled()
                 messages.info(request, 'Order cancelled!')
                 return HttpResponseRedirect(reverse_lazy('shop:index'))
 
         if 'cancel_order' in request.POST:
-            order.delete()
+            order.mark_as_cancelled()
             messages.info(request, 'Order cancelled!')
             return HttpResponseRedirect(reverse_lazy('shop:index'))