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Currency DB Field

Author:
Rupe
Posted:
May 25, 2009
Language:
Python
Version:
1.0
Tags:
internationalization i18n database currency field babel decimal
Score:
0 (after 0 ratings)

This is an extension of the DecimalField database field that uses my Currency Object, Currency Widget, and Currency Form Field.

I placed my Currency object in the Django\utils directory, the widget in Django\froms\widgets_special.py, and the form field in Django\forms\fields_special.py because I integrated this set of currency objects into the Admin app ( here ) and it was just easier to have everything within Django.

UPDATE 08-18-2009: Added 'import decimal' and modified to_python slightly.

The rest of the series: Currency Object, Currency Widget, Currency Form Field, Admin Integration

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import decimal
from django.db.models import fields
from django.db.models.fields.subclassing import SubfieldBase
from django.forms import fields_special
from django.utils.currency import Currency
from django.utils.translation import ugettext as _

class CurrencyField(fields.DecimalField):

    __metaclass__ = SubfieldBase

    def __init__(self,  verbose_name=None, name=None, max_digits=None, *args, **kwargs):
        if not kwargs.has_key("help_text"):
            kwargs['help_text'] = _('Format: ') + Currency(9999.00).format()
        decimal_places = 2
        if kwargs.has_key('decimal_places'):
            del kwargs['decimal_places']
        fields.DecimalField.__init__(self, verbose_name, name, max_digits, decimal_places, *args, **kwargs)

    def format(self):
        return Currency(self).format()

    def format_number(self, value):
        return Currency(value).format()

    def formfield(self, **kwargs):
        defaults = {
            'form_class': fields_special.CurrencyField,
        }
        defaults.update(kwargs)
        return super(CurrencyField, self).formfield(**defaults)

    def to_python(self, value):
        if value is None:
            return value
        try:
            return Currency(value)
        except decimal.InvalidOperation:
            raise decimal.InvalidOperation(
                _("This value must be a decimal number."))

    def value_to_string(self, obj):
        val = self._get_val_from_obj(obj)
        if val is None:
            data = ''
        else:
            data = str(val)
        return data

More like this

  1. Currency Widget by Rupe 6 years, 1 month ago
  2. Currency Form Field by Rupe 6 years, 1 month ago
  3. Currency Field Admin Integration by Rupe 6 years, 1 month ago
  4. Currency Object by Rupe 6 years, 1 month ago
  5. autocompleter with database query by bbolli 8 years ago

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