Wiring initial user balance

uncloud/uncloud_pay/models.py

@@ -9,8 +9,7 @@ AMOUNT_DECIMALS=2
 
 class Bill(models.Model):
     owner = models.ForeignKey(get_user_model(),
-            on_delete=models.CASCADE,
-            editable=False)
+            on_delete=models.CASCADE)
 
     creation_date = models.DateTimeField()
     starting_date = models.DateTimeField()
@@ -23,7 +22,7 @@ class Bill(models.Model):
     @property
     def amount(self):
         # iterate over all related orders
-        pass
+        return 20
 
 
 class Order(models.Model):
@@ -82,6 +81,9 @@ class PaymentMethod(models.Model):
     description = models.TextField()
     primary = models.BooleanField(default=True)
 
+    def charge(self, amount):
+        pass
+
     class Meta:
         unique_together = [['owner', 'primary']]
 
@@ -89,8 +91,7 @@ class Payment(models.Model):
     uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
 
     owner = models.ForeignKey(get_user_model(),
-            on_delete=models.CASCADE,
-            editable=False)
+            on_delete=models.CASCADE)
 
     amount = models.DecimalField(
             default=0.0,