from django.db import models from django.utils.translation import ugettext_lazy as _ from decimal import Decimal from core.models import User class CurrencyField(models.DecimalField): """ This is a custom database field used for currency """ __metaclass__ = models.SubfieldBase def __init__(self, *args, **kwargs): kwargs['max_digits'] = 12 kwargs['decimal_places'] = 2 super(CurrencyField, self).__init__(*args, **kwargs) def to_python(self, value): try: return super(CurrencyField, self).to_python(value).quantize(Decimal("0.01")) except AttributeError: return None class Customer(models.Model): """ This class extends a user to make a customer. It adds some basic customers informations, such as the accound ID, and is used by other accounting classes as reference to the customer, rather than using User """ user = models.OneToOneField(User, primary_key=True) account_id = models.CharField(_('account id'), max_length=10, unique=True) class Meta: verbose_name = _('customer') verbose_name_plural = _('customers') def __str__(self): return self.user.username class ProductType(models.Model): """ This describes a product type Useful only for categorizing, changes are made at the product level """ name = models.CharField(_('name'), max_length=30) description = models.TextField(_('description'), null=True, blank=True) icon = models.ImageField(upload_to='products', null=True, blank=True) def __str__(self): return self.name class Product(models.Model): """ This describes a product, with all its related informations """ name = models.CharField(_('name'), max_length=30) description = models.TextField(_('description'), blank=True) product_type = models.ForeignKey(ProductType, related_name='products', null=True, blank=True) code = models.CharField(_('code'), max_length=10) purchase_price = CurrencyField(_('purchase price')) selling_price = CurrencyField(_('selling price')) special_selling_price = CurrencyField(_('special selling price')) icon = models.ImageField(upload_to='products', null=True, blank=True) def __str__(self): return self.name class GeneralJournal(models.Model): """ Class storing all the invoices for a period of time """ start_date = models.DateField(_('start date')) end_date = models.DateField(_('end date'), null=True, blank=True, default=None) name = models.CharField(_('name'), max_length=30) closed = models.BooleanField(_('is closed'), default=False) # When clubs are done: ForeignKey(Proprietary) def __str__(self): return self.name class GenericInvoice(models.Model): """ This class is a generic invoice, made to be extended with some special cases (eg: for the internal accounting, payment system, etc...) """ journal = models.ForeignKey(GeneralJournal, related_name="invoices", null=False) name = models.CharField(_('name'), max_length=100) def __str__(self): return self.journal.name+' - '+self.name # TODO: CountingInvoice in Counting app extending GenericInvoice # - ManyToMany Product