嵌套键中的jq特殊字符 [英] jq special characters in nested keys

问题描述

我有一个类似于以下内容的json:

I have a json similar to the following:

{
    "_source" : {
        "index-pattern" : {
            "fields" : ""
        }
    }
}

我正在尝试修改字段，但链接了.身份运算符，例如'jq ._source.["index-pattern"].fields'会产生以下错误:

I'm trying to modify fields, but chaining the . identity operator, such as 'jq ._source.["index-pattern"].fields' produces the following error:

'._source.["index-pattern"]
         ^
1 compile error'

有什么想法吗?

谢谢

推荐答案

您可以这样写:

._source | .["index-pattern"].fields

甚至:

._source["index-pattern"].fields

说明:如果"x"和"y"表示是以字母字符(其中字母"包括"_")开头的字母数字字符串，则.x | .y可以缩写为.x.y.

Explanation: if "x" and "y" are alphanumeric strings that begin with an alphabetic character (where "alphabetic" includes "_") then .x | .y can be abbreviated to .x.y.

在其他几种情况下，可以缩写E | F，例如E | .[]通常可以缩写为E[].

There are several other circumstances when E | F can be abbreviated, e.g. E | .[] can often be abbreviated to E[].

但是，一般规则是:

如果缩写形式不起作用，请不要使用它.

If an abbreviated form does not work, don't use it.

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