Add OrderRecord model

uncloud/uncloud_pay/models.py

@@ -98,12 +98,25 @@ class Order(models.Model):
 
     @property
     def amount(self):
-        #     amount = recurring_price
-        #     if recurring and first_month:
-        #         amount += one_time_price
+        records = OrderRecord.objects.filter(order=self)
+        return 1
 
-        amount=1
-        return amount
+class OrderRecord(models.Model):
+    order = models.ForeignKey(Order, on_delete=models.CASCADE)
+    setup_fee = models.DecimalField(default=0.0,
+            max_digits=AMOUNT_MAX_DIGITS,
+            decimal_places=AMOUNT_DECIMALS,
+            validators=[MinValueValidator(0)])
+    recurring_price = models.DecimalField(default=0.0,
+            max_digits=AMOUNT_MAX_DIGITS,
+            decimal_places=AMOUNT_DECIMALS,
+            validators=[MinValueValidator(0)])
+
+    description = models.TextField()
+
+    @property
+    def recurring_period(self):
+        return self.order.recurring_period
 
 class PaymentMethod(models.Model):
     uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)