如何在Django项目中为DecimalFields设置全局舍入？ [英] How to set global rounding for DecimalFields in Django project?

问题描述

我发现了与答案类似的问题，但在settings.py和在apps.py中设置getcontext（）不起作用。标准的小数舍入是ROUND_HALF_EVEN，但是我需要设置ROUND_HALF_UP。

I found similar question with answers, but "setting the option in the settings.py" and "setting getcontext() in apps.py" doesn't work. Standard decimal rounding is ROUND_HALF_EVEN, but I need to set ROUND_HALF_UP.

我用引号重复我的问题-在Django应用程序中必须设置舍入选项的位置，以便它可以在项目中全局工作？

And I repeat my question with a quote - "where in the Django application I have to set rounding option, so that it would work globally in the project?"

推荐答案

对于Django项目，可以设置decimal.DefaultContext（ py3 ， py2 ）。

For django project can work setting decimal.DefaultContext (py3, py2).

此上下文在多线程环境中最有用。

This context is most useful in multi-threaded environments.

这是我的代码，来自 settings.py ：

import decimal
# Set global decimal rounding to ROUND_HALF_UP (instead of ROUND_HALF_EVEN).
project_context = decimal.getcontext()
project_context.rounding = decimal.ROUND_HALF_UP
decimal.DefaultContext = project_context

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