columns.py 文件源码

def validate(self, value):
        from decimal import Decimal as _Decimal
        from decimal import InvalidOperation
        val = super(Decimal, self).validate(value)
        if val is None:
            return
        try:
            return _Decimal(repr(val)) if isinstance(val, float) else _Decimal(val)
        except InvalidOperation:
            raise ValidationError("{0} '{1}' can't be coerced to decimal".format(self.column_name, val))