Fixed #10692 -- Fixed DecimalField lookups for extreme values.

        from django.db.backends import util

        return util.format_number(value, self.max_digits, self.decimal_places)

    def get_db_prep_value(self, value):

    def get_db_prep_save(self, value):

        return connection.ops.value_to_db_decimal(self.to_python(value),

                self.max_digits, self.decimal_places)

    def get_db_prep_value(self, value):

        return self.to_python(value)

    def formfield(self, **kwargs):

        defaults = {

            'max_digits': self.max_digits,

import datetime

import unittest

import django.test

from django import forms

from django.db import models

from django.core.exceptions import ValidationError

from models import Foo, Bar, Whiz, BigD, BigS

try:

    from decimal import Decimal

except ImportError:

        Foo.objects.create(id=1, a='abc', d=Decimal("12.34"))

        self.assertEqual(list(Foo.objects.filter(d=u'1.23')), [])

    def test_save_wihout_float_conversion(self):

    def test_save_without_float_conversion(self):

        """

        Ensure decimals don't go through a corrupting float conversion during

        save (#5079).

        bd = BigD.objects.get(pk=bd.pk)

        self.assertEqual(bd.d, Decimal("12.9"))

    def test_lookup_really_big_value(self):

        """

        Ensure that really big values can be used in a filter statement, even

        with older Python versions.

        """

        # This should not crash. That counts as a win for our purposes.

        Foo.objects.filter(d__gte=100000000000)

class ForeignKeyTests(django.test.TestCase):

    def test_callable_default(self):

        """Test the use of a lazy callable for ForeignKey.default"""

        bs = BigS.objects.create(s = 'slug'*50)

        bs = BigS.objects.get(pk=bs.pk)

        self.assertEqual(bs.s, 'slug'*50)