07/30/09
Barcode (GTIN) field for Django -
Categories: It was pretty simple in the end. You can find the item with and without zero padding.
Code:
from django.db import models | |
class BarcodeField(models.IntegerField): | |
__metaclass__ = models.SubfieldBase | |
| |
def to_python(self, value): | |
if value is None: return | |
return "%014.0d" % value | |
| |
def get_db_prep_save(self, value): | |
if value is None: return | |
return int(value) |
And using it:
Code:
from project import cfields | |
class Product(models.Model): | |
status = models.IntegerField() | |
barcode = cfields.BarcodeField() |
Code:
>>> eeepc = Product(name="ASUS Eee PC 1005HA-PU1X-BK 10.1-Inch Black Netbook", status=1) | |
>>> eeepc.barcode=304 | |
>>> eeepc.barcode | |
'00000000000304' | |
>>> eeepc.save() | |
>>> eeepc.barcode | |
'00000000000304' | |
>>> eeepc.barcode=39584 | |
>>> eeepc.save() | |
>>> Product.objects.get(barcode="00000000039584") | |
<Product: ASUS Eee PC 1005HA-PU1X-BK 10.1-Inch Black Netbook> | |
>>> Product.objects.get(barcode="00000000039584").barcode | |
'00000000039584' | |
>>> Product.objects.get(barcode=39584).barcode | |
'00000000039584' |
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