精度舍入必须为正

Question

所以我想把我的代码从Odoo12转换成Odoo13，我被这部分卡住了：

#digits_rounding_precision here is 0.0
digits_rounding_precision = self.currency_id.rounding
        if float_is_zero(self.residual_amount, precision_rounding=digits_rounding_precision):
            self.reconciled = True
        else:
            self.reconciled = False

我得到了这种类型的错误：

precision_rounding must be positive, got %s" % precision_rounding
AssertionError: precision_rounding must be positive, got 0.0

但是在Odoo12上，值为0.0就可以了，请帮帮我

Answer 1

在看了Odoo的源代码后，我发现了这个(在Odoo 13.0及更高版本中)：

https://github.com/odoo/odoo/blob/13.0/odoo/tools/float_utils.py#L25

def _float_check_precision(precision_digits=None, precision_rounding=None):
    assert (precision_digits is not None or precision_rounding is not None) and \
        not (precision_digits and precision_rounding),\
         "exactly one of precision_digits and precision_rounding must be specified"
    assert precision_rounding is None or precision_rounding > 0,\
         "precision_rounding must be positive, got %s" % precision_rounding
    if precision_digits is not None:
        return 10 ** -precision_digits
    return precision_rounding

而在Odoo 12.0中是这样的：

def _float_check_precision(precision_digits=None, precision_rounding=None):
    assert (precision_digits is not None or precision_rounding is not None) and \
        not (precision_digits and precision_rounding),\
         "exactly one of precision_digits and precision_rounding must be specified"
    if precision_digits is not None:
        return 10 ** -precision_digits
    return precision_rounding

所以看起来他们添加了额外的条件，precision_rounding不能再等于零了-所以你必须指定正数。

简单的解决方法是向它添加一个小数字，以确保它是正数。像0.01这样的东西应该没问题，因为Odoo声明precision_rounding可以是浮动的。

"""
       :param int precision_digits: number of fractional digits to round to.
       :param float precision_rounding: decimal number representing the minimum
           non-zero value at the desired precision (for example, 0.01 for a 
           2-digit precision).
       :param float value: value to compare with the precision's zero
       :return: True if ``value`` is considered zero
"""