按属性过滤对象并在jmespath中使用键进行选择 [英] Filter object by property and select with key in jmespath

问题描述

我正在尝试根据子属性的值过滤 jmespath 中的对象属性，并希望包含仅将子属性设置为特定值的那些属性.

I'm trying to filter properties of an object in jmespath based on the value of a subproperty and want to include only those properties where the subproperty is set to a specific value.

基于此示例数据:

{
  "a": {
    "feature": {
      "enabled": true,
    }
  },
  "b": {
  },
  "c": {
    "feature": {
      "enabled": false
     }
  }
}

我想获取一个具有启用该功能的所有属性的对象.

I'd like to get an object with all properties where the feature is enabled.

{
  "a": {
    "feature": {
      "enabled": true,
    }
  }
}

我认为我可以使用此jmespath查询来过滤property. enabled设置为true的对象.不幸的是，它似乎不起作用，而是返回一个空数组.

I figured I could use this jmespath query to filter the objects where property. enabled is set to true. Unfortunateley, it doesn't seem to work and instead returns an empty array.

*[?feature.enabled==`true`]

*.feature.enabled或*[feature.enabled]仅返回布尔值，而没有任何上下文.

*.feature.enabled or *[feature.enabled] return just the boolean values without any context.

即使*[?feature.enabled== true ]可以工作，它也只是属性值的数组，但是我还需要键(a和c).有什么办法可以使它在jmespath中发生?

Even if *[?feature.enabled==true] would work, it would just be an array of the property values, but I need the keys (a and c) aswell. Is there any way to make this happen in jmespath?

这都是ansible剧本的一部分，因此肯定会有一种以其他方式(Jinja2模板或自定义插件)实现选择的方法，但是我想尝试jmespath并会推理，它应该能够做到这一点一个任务.

This is all part of an ansible playbook, so there would certainly be a way to achieve selection in a different way (Jinja2 templates or custom plugin) but I wanted to try jmespath and would reason, that it should be capable of such a task.

推荐答案

对不起，但是AFAIK在本机JMESPath中是不可能的.
在不同工具中，例如to_entries，有自定义的内置函数可用于此目的.rel ="nofollow noreferrer" > jq .
对于jmespath.py以及对Ansible而言，悬挂拉请求来实现密钥操作.

Sorry, but AFAIK this is impossible in native JMESPath.
There are custom built-in functions for this purpose in different tools like to_entries in jq.
For jmespath.py and thus for Ansible there is hanging pull request to implement keys manipulation.

更新:我制作了 json_query 过滤器.
有关其他信息，请参见此答案.

Update: I've made a patched version of json_query filter.
See this answer for additional info.

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