Django部分更新 [英] Django partial update

问题描述

我有两个线程，一个运行类似 update t set ColA = foo 的东西，另一个运行 update t set ColB = foo .如果他们在执行原始SQL语句，则不会有争用，但是由于Django获取并保存了整行，因此会出现竞争条件.

I have two threads, one which runs something like update t set ColA=foo and the other runs update t set ColB=foo. If they were doing raw SQL statements there would be no contention, but since Django gets and saves the entire row, a race condition can occur.

有什么办法告诉Django我只想保存一列吗?

Is there any way to tell Django that I just want to save a certain column?

推荐答案

您正确的说， save 将更新整行，但是Django有一个 update 可以完成所有操作你描述.

You are correct that save will update the entire row but Django has an update which does exactly what you describe.

https://docs.djangoproject.com/en/stable/ref/models/querysets/#update

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