简单的jq筛选器无法在Windows Shell中运行，出现各种引用问题

本文介绍了简单的jq筛选器无法在Windows Shell中运行，出现各种引用问题的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我非常努力地使Windows Shell与jq一起使用，并且失败了。

I am trying really hard to get the Windows shell working with jq and failing miserably.

我想要这种类型的东西

echo '["a","b","c"]' | .\Downloads\jq.exe -r '{ "data": map({ "{#SNAME}": . })}'

但是我得到一个错误：

如果我只是做 echo'[ a， b， c]'| .\Downloads\jq.exe -r'。'然后很高兴，但是ii还要添加其他字符，例如 echo'[ a， b ， c]'| .\Downloads\jq.exe -r'{。}'，然后再次失败：

If i just do echo '["a","b","c"]' | .\Downloads\jq.exe -r '.' then it's happy but as soon i i add in other characters such as echo '["a","b","c"]' | .\Downloads\jq.exe -r '{.}' then it fails again with:

有人吗？知道如何使Windows shell对jq满意，以使上述示例能够按预期工作？

Does anyone know how to make Windows shell happy with jq for the above examples to work as expected ?

使用jq网站上的最新1.6版本进行这些测试，并确认jq命令可以使用Linux和jqplay.org。

Using latest 1.6 build from jq website for these tests and confirmed the jq commands work using Linux and jqplay.org.

谢谢。

推荐答案

您有三个主要选项：

（轻松）将JSON和jq程序放入单独的文件中（或者小心地放入一个文件），并相应地调用jq。

(Easy) Put the JSON and jq program into separate files (or maybe, with care, into one file), and invoke jq accordingly.

（容易出错），请遵循所用shell的引用规则。

(Error-prone) Follow the quoting rules for the shell you're using.

上述各项的组合。

我的基本规则理解如下：在Windows cmd 命令行提示符下，在orde中r引用字符串，可以使用双引号，并使用反斜杠将字符串内的双引号转义。

The basic rule as I understand it is as follows: at a Windows cmd command-line prompt, in order to quote strings, you use double-quotes, and escape double-quotes within the string using backslashes.

例如：

C>ver
Microsoft Windows [Version 10.0.17134.590]

C>echo "hello \"world\"" | jq .
"hello \"world\""

C>jq -n "\"hello world\""
"hello world"

您的示例

Your example

C>echo ["a","b","c"] | jq -c "{\"data\":map({\"{#SNAME}\":.})}"
{"data":[{"{#SNAME}":"a"},{"{#SNAME}":"b"},{"{#SNAME}":"c"}]}

后记

除了哈希（＃）和花括号（ {} ），可以通过避免空格来实现目标：

Postscript

Except for the hash (#) and braces ({}) in the string, one can achieve the goal by avoiding spaces:

C>echo ["a","b","c"] | jq -c {"data":map({"SNAME":.})}
{"data":[{"SNAME":"a"},{"SNAME":"b"},{"SNAME":"c"}]}

Powershell

同样，除了哈希和花括号外，还可以使用简单的解决方案：

Powershell

Again, except for the hash and braces, simple solutions are possible:

使用单引号引起来的字符串：

Using single-quoted strings:

 echo '["a", "b", "c"]' | jq -c '{"data": map( {"SNAME": . })}'
 {"data":[{"SNAME":"a"},{"SNAME":"b"},{"SNAME":"c"}]}

使用在双引号字符串内：

Using "" inside double-quoted strings:

echo '["a", "b", "c"]' | jq -c "{""data"": map( {""SNAME"": . })}"
{"data":[{"SNAME":"a"},{"SNAME":"b"},{"SNAME":"c"}]}

我所用的PowerShell文档

The PowerShell documentation that I've seen suggests backticks can be used to escape special characters within double-quoted strings, but YMMV.

碰碰运气的机会！

这篇关于简单的jq筛选器无法在Windows Shell中运行，出现各种引用问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

JQ