fields.py 文件源码

def __init__(self, min_value=None, max_value=None, force_string=False,
                 precision=2, rounding=decimal.ROUND_HALF_UP, **kwargs):
        """
        :param min_value: Validation rule for the minimum acceptable value.
        :param max_value: Validation rule for the maximum acceptable value.
        :param force_string: Store as a string.
        :param precision: Number of decimal places to store.
        :param rounding: The rounding rule from the python decimal library:

            - decimal.ROUND_CEILING (towards Infinity)
            - decimal.ROUND_DOWN (towards zero)
            - decimal.ROUND_FLOOR (towards -Infinity)
            - decimal.ROUND_HALF_DOWN (to nearest with ties going towards zero)
            - decimal.ROUND_HALF_EVEN (to nearest with ties going to nearest even integer)
            - decimal.ROUND_HALF_UP (to nearest with ties going away from zero)
            - decimal.ROUND_UP (away from zero)
            - decimal.ROUND_05UP (away from zero if last digit after rounding towards zero would have been 0 or 5; otherwise towards zero)

            Defaults to: ``decimal.ROUND_HALF_UP``

        """
        self.min_value = min_value
        self.max_value = max_value
        self.force_string = force_string
        self.precision = precision
        self.rounding = rounding

        super(DecimalField, self).__init__(**kwargs)