Sith/eboutic/models.py

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from django.db import models, DataError
from django.utils.translation import ugettext_lazy as _
from accounting.models import CurrencyField
from counter.models import Counter, Product
from core.models import User
class Basket(models.Model):
"""
Basket is built when the user validate its session basket and asks for payment
"""
user = models.ForeignKey(User, related_name='baskets', verbose_name=_('user'), blank=False)
date = models.DateTimeField(_('date'), auto_now=True)
def get_total(self):
total = 0
for i in self.items.all():
total += i.quantity * i.product_unit_price
return total
class Invoice(models.Model):
"""
Invoices are generated once the payment has been validated
"""
user = models.ForeignKey(User, related_name='invoices', verbose_name=_('user'), blank=False)
date = models.DateTimeField(_('date'), auto_now=True)
payment_method = models.CharField(choices=[('CREDIT_CARD', _('Credit card')), ('SITH_ACCOUNT', _('Sith account'))],
max_length=20, verbose_name=_('payment method'))
validated = models.BooleanField(_("validated"), default=False)
def get_total(self):
total = 0
for i in self.items.all():
total += i.quantity * i.product_unit_price
return total
def validate(self, *args, **kwargs):
if self.validated:
raise DataError(_("Invoice already validated"))
if self.payment_method == "SITH_ACCOUNT":
self.user.customer.amount -= self.get_total()
self.user.customer.save()
self.validated = True
self.save()
class AbstractBaseItem(models.Model):
product_name = models.CharField(_('product name'), max_length=255)
product_unit_price = CurrencyField(_('unit price'))
quantity = models.IntegerField(_('quantity'))
class Meta:
abstract = True
def __str__(self):
return "Item: %s (%s) x%d" % (self.product_name, self.product_unit_price, self.quantity)
class BasketItem(AbstractBaseItem):
basket = models.ForeignKey(Basket, related_name='items', verbose_name=_('basket'))
class InvoiceItem(AbstractBaseItem):
invoice = models.ForeignKey(Invoice, related_name='items', verbose_name=_('invoice'))