Add order termination logic

uncloud_pay/models.py

@@ -553,8 +553,14 @@ class Bill(models.Model):
 
     @property
     def final(self):
-        # A bill is final when its ending date is passed.
-        return self.ending_date < timezone.now()
+        # A bill is final when its ending date is passed, or when all of its
+        # orders have been terminated.
+        every_order_terminated = True
+        billing_period_is_over = self.ending_date < timezone.now()
+        for order in self.order_set.all():
+            every_order_terminated = every_order_terminated and order.is_terminated
+
+        return billing_period_is_over or every_order_terminated
 
     def activate_products(self):
         for order in self.order_set.all():
@@ -850,6 +856,14 @@ class Order(models.Model):
                                     on_delete=models.PROTECT,
                                     blank=True,
                                     null=True)
+    @property
+    def is_terminated(self):
+        return self.ending_date != None and self.ending_date < timezone.now()
+
+    def terminate(self):
+        if not self.is_terminated:
+            self.ending_date = timezone.now()
+            self.save()
 
     # Trigger initial bill generation at order creation.
     def save(self, *args, **kwargs):