First rush of models. WIP

shop_multiplecurrencies/models.py

@@ -1,3 +1,43 @@
 from django.db import models
+from shop.util.fields import CurrencyField 
+from shop.models.productmodels import Product
 
 # Create your models here.
+
+class Currency(models.Model):
+    name = models.CharField(max_length=255)
+    symbol = models.CharField(max_length=10) # Should be short
+    prefix = models.Boolean(default=False) # Should the symbol be prefixed?
+
+class Price(models.Model):
+    """
+    A class representing a Price. A price is made of a value (the numerical
+    part), and a currency. They are tied to a product.
+    """
+    # Product is polymorphic, so this is actually a key to Product subclasses
+    product = models.ForeignKey(Product)
+    value = CurrencyField()
+    currency = models.ForeignKey(Currency)
+
+    def __unicode__(self):
+        if self.currency.prefix:
+            return "%s%s" % (self.currency.symbol, self.value)
+        else:
+            return "%s%s" % (self.value, self.currency.symbol)
+
+
+class MultipleCurrencyMixin(object):
+    """
+    A mixin to add to your product subclasses to make them multi-currencies
+    aware.
+    """
+    def get_price(self):
+        pass # TODO: Use a default currency setting or something
+
+    def get_price_in_currency(self, symbol):
+        """
+        Returns the price for this product in the currency matching `symbol`
+        """
+        price = Price.objects.filter(product=self, currency__symbol=symbol)
+        if len(price):
+            price = price[0]