I have a strange problem with Satchmo (eCommerce solution built using
Django) with a field defined as a FloatField but is returned as an "str"
instead of a Decimal.
Here is an excerpt of the code:
class SubItem(models.Model):
"""
The unique inventoriable item. For instance, if a shirt has a size
and color, then
only 1 SubItem would have Size=Small and Color=Black
"""
item = models.ForeignKey(Item)
def _get_fullPrice(self):
price_delta = Decimal("0.0")
for option in self.options.all():
if option.price_change:
price_delta += option.price_change
return self.item.price + price_delta
unit_price = property(_get_fullPrice)
class Item(models.Model):
"""
The basic product being sold in the store. This is what the
customer sees.
"""
price = models.FloatField(max_digits=6, decimal_places=2,
help_text="Base price for this item")
In _get_fullPrice, self.item.price is returned as an str instead of a
Decimal and it crash due to the difference in type between
self.item.price and price_delta.
I'm running Satchmo from python manage.py runserver on a windows box
with python 2.4 both Django and Satchmo from trunk updated today and MySql.
The error returned is the following
Request Method: GET
Request URL: http://localhost:8000/shop/cart/
Exception Type: TypeError
Exception Value: cannot concatenate 'str' and 'Decimal' objects
Exception Location:
C:\DjangoProjects\satchmo_20061228\satchmo\..\satchmo\product\models.py
in _get_fullPrice, line 339
Can somebody help ?
I don't understand and can't find the mechanism by which the Django type
"FloatField" is converted to a Python Decimal.
If I understand well, str is a method of the Decimal class. I don't
understand why it is returned.
I don't know if I gave enough details for somebody to help, please tell
me if you need more information to help.
- Frederic
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