[1.0.X] Fixed #5079 -- Avoid converting Decimals to floats during save to the database.

    Formats a number into a string with the requisite number of digits and

    decimal places.

    """

    if isinstance(value, decimal.Decimal):

        context = decimal.getcontext().copy()

        context.prec = max_digits

        return u'%s' % str(value.quantize(decimal.Decimal(".1") ** decimal_places, context=context))

    else:

        return u"%.*f" % (decimal_places, value)

    )

    c = models.IntegerField(choices=CHOICES, null=True)

class BigD(models.Model):

    d = models.DecimalField(max_digits=38, decimal_places=30)

__test__ = {'API_TESTS':"""

# Create a couple of Places.

>>> f = Foo.objects.create(a='abc', d=decimal.Decimal("12.34"))

>>> Foo.objects.filter(d=u'1.23')

[]

# Regression test for #5079 -- ensure decimals don't go through a corrupting

# float conversion during save.  

>>> bd = BigD(d="12.9")

>>> bd.save()

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

>>> bd.d == decimal.Decimal("12.9")

True

"""}