使用jq从JSON对象中删除key:value [英] Remove a key:value from an JSON object using jq

问题描述

我正在尝试使用jq从JSON对象添加和删除"key:value".我是jq的新手，但我不了解jq会给我带来的错误，因此，非常有帮助我朝正确的方向发展.我的特定问题是我有一个JSON对象(如下)，并且我希望能够从JSON对象添加/删除"maxHeight"键/值.

I’m trying to add and remove a 'key:value' from a JSON object using jq. I’m new using jq and I do not understand the errors that jq is throwing at me, so any help pushing me in the correct direction is greatly appreciated. My specific issue is I have a JSON object (below) and I want to be able to add/remove the "maxHeight" key/value from the JSON object.

一些我尝试过的错误提示命令...

Some commands I’ve tried with the errors I get…

jq 'recurse(.[]) |= del(.maxHeight)' new.json   

无法遍历null(null)

Cannot iterate over null (null)

 jq 'recurse(.[]) |= {maxHeight}' new.json

无法遍历字符串(功能")

Cannot iterate over string ("feature")

jq 'recurse(.[]) |= .maxHeight' new.json 

无法索引字符串为样式"的字符串

Cannot index string with string "style"

new.json文件看起来像这样...

new.json file looks like this...

{
  "style": {
    "className": "feature",
    "showLabels": false,
    "color": "function(feature, variableName, glyphObject, track){if(feature.get(\"type\") === \"CDS\"){return \"#9CFBF5\";} else if(feature.get(\"type\") === \"exon\"){return \"#43A47F\";} else if(feature.get(\"type\") === \"intron\"){return \"#E8E8E8\";} else if(feature.get(\"type\") === \"five_prime_UTR\"){return \"#F192FE\";} else if(feature.get(\"type\") === \"three_prime_UTR\"){return \"#FEC892\";} else {return \"#FF0000\";}}",
    "arrowheadClass": null,
    "featureCss": "padding:3px;"
  },
  "menuTemplate": [
    {
      "label": "View details"
    },
    {
      "label": "Highlight a gene"
    },
    {
      "iconClass": "dijitIconBookmark",
      "content": "function(track,feature,div) { window.parent.angular.element(window.frameElement).scope().specificNote( feature[2] ) }",
      "action": "contentDialog",
      "title": "(feature{name})",
      "label": "Create Note"
    }
  ],
  "hooks": {
    "modify": " function(track,feature,div){   var checkArr=[\"Reference\",\"Missing\",\"Heterozygous\",\"NonReference\"];for(var i=0;i<feature.length;i++){for(var j=0;j<checkArr.length;j++){  if( i>3) { if( feature[i] ===  checkArr[j] ) {  if(feature[i]==\"NonReference\"){div.style.backgroundColor=\"red\"}else if(feature[i]==\"Reference\"){div.style.backgroundColor=\"green\"}else if(feature[i]==\"Heterozygous\"){div.style.backgroundColor=\"orange\"}else if(feature[i]==\"Missing\"){div.style.backgroundColor=\"grey\"} }}}}} "
  },
  "key": "cucumber_ChineseLong_v2.gff3",
  "storeClass": "JBrowse/Store/SeqFeature/NCList",
  "trackType": null,
  "maxHeight": "200px",
  "urlTemplate": "tracks/cucumber_ChineseLong_v2.gff3/{refseq}/trackData.json",
  "compress": 0,
  "label": "cucumber_ChineseLong_v2.gff3",
  "type": "JBrowse/View/Track/CanvasFeatures"
}

推荐答案

有两种方法:

• 有针对性的方法，如上一个问题的解答所示，在带有jq

忽略特定上下文的全局方法.

the global approach, that ignores the specific context.

以下说明了全局方法:

walk(if type == "object" and has("maxHeight") then del(.maxHeight) else . end)

这实际上是通过更新具有指定键的任何对象来编辑"输入.

This in effect "edits" the input by updating whichever objects have the specified key.

如果您的jq没有 walk/1 ，只需添加其def(例如，可从

If your jq does not have walk/1 simply include its def (available e.g. from https://raw.githubusercontent.com/stedolan/jq/master/src/builtin.jq) before invoking it.

这篇关于使用jq从JSON对象中删除key:value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IT屋！