Order Subsystem

Orders represent a payment for some kind of product(s), these products will typically be either Programs or Course Runs. An order is marked as unfulfilled initially and then marked as fulfilled once a payment is completed. An order can fail or be refunded.

Data Model

class Order(TimestampedModel):
    """An order containing information for a purchase."""
    status = models.CharField()
    purchaser = models.ForeignKey(settings.AUTH_USER_MODEL)
    total_price_paid = models.DecimalField()

class Line(TimestampedModel):
    """A line in an Order."""

    order = models.ForeignKey(Order)
    product_version = models.ForeignKey(ProductVersion)
    quantity = models.PositiveIntegerField()

class Transaction(TimestampedModel):
    """A transaction on an order, generally a payment but can also cover refunds"""
    order = models.ForeignKey(Order)
    amount = models.DecimalField(
        decimal_places=5,
        max_digits=20,
    )
    data = models.JSONField()