使用jq修改json中的键值 [英] Modify a key-value in a json using jq

问题描述

我有一个json，我想在其中修改特定的值，但是终端总是显示带有修改后的值的json，但实际上并没有更改特定文件中的值.样本json:

I have a json in which I want to modify a particular value but the terminal always displays the json with the modified value but it does not actually change the value in the particular file. Sample json:

{
   name: 'abcd',
   age: 30,
   address: 'abc'
}

我想更改文件本身中的address的值，但到目前为止，我一直无法更改.我尝试使用:

I want to change the value of address in the file itself but so far I've been unable to do so. I tried using:

jq '.address = "abcde"' test.json

但是没有用.有什么建议吗?

but it didn't work. Any suggestions?

推荐答案

AFAIK jq不支持就地编辑，因此您必须先重定向到一个临时文件，然后再用它替换原始文件，或使用<来自moreutils软件包的c1>实用工具，如下所示:

AFAIK jq does not support in-place editing, so you must redirect to a temporary file first and then replace your original file with it, or use sponge utility from the moreutils package, like that:

jq '.address = "abcde"' test.json|sponge test.json

还有其他重定向到相同文件"的技术，例如将输出保存在变量e.t.c中.如果您想了解更多有关"Unix&Linux StackExchange"的信息，那么这是一个不错的起点.

There are other techniques to "redirect to the same file", like saving your output in a variable e.t.c. "Unix & Linux StackExchange" is a good place to start, if you want to learn more about this.

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