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from django.db import models
from django.utils.dates import MONTHS_3
from django.utils.translation import gettext_lazy as _
from polymorphic.models import PolymorphicModel
class Order(models.Model):
"""
An example order that has polymorphic relations
"""
title = models.CharField(_("Title"), max_length=200)
class Meta:
verbose_name = _("Organisation")
verbose_name_plural = _("Organisations")
ordering = ("title",)
def __str__(self):
return self.title
class Payment(PolymorphicModel):
"""
A generic payment model.
"""
order = models.ForeignKey(Order, on_delete=models.CASCADE)
currency = models.CharField(default="USD", max_length=3)
amount = models.DecimalField(max_digits=10, decimal_places=2)
class Meta:
verbose_name = _("Payment")
verbose_name_plural = _("Payments")
def __str__(self):
return f"{self.currency} {self.amount}"
class CreditCardPayment(Payment):
"""
Credit card
"""
MONTH_CHOICES = [(i, n) for i, n in sorted(MONTHS_3.items())]
card_type = models.CharField(max_length=10)
expiry_month = models.PositiveSmallIntegerField(choices=MONTH_CHOICES)
expiry_year = models.PositiveIntegerField()
class Meta:
verbose_name = _("Credit Card Payment")
verbose_name_plural = _("Credit Card Payments")
class BankPayment(Payment):
"""
Payment by bank
"""
bank_name = models.CharField(max_length=100)
swift = models.CharField(max_length=20)
class Meta:
verbose_name = _("Bank Payment")
verbose_name_plural = _("Bank Payments")
class SepaPayment(Payment):
"""
Payment by SEPA (EU)
"""
iban = models.CharField(max_length=34)
bic = models.CharField(max_length=11)
class Meta:
verbose_name = _("SEPA Payment")
verbose_name_plural = _("SEPA Payments")
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