使用jq将新元素添加到现有JSON数组

Question

我想使用命令将元素添加到JSON文件中的数组jq``add，但是不起作用。

report-2017-01-07.json 文件：

{  
   "report": "1.0",
   "data": {  
      "date": "2010-01-07",
      "messages": [  
         {  
            "date": "2010-01-07T19:58:42.949Z",
            "xml": "xml_samplesheet_2017_01_07_run_09.xml",
            "status": "OK",
            "message": "metadata loaded into iRODS successfully"
         },
         {  
            "date": "2010-01-07T20:22:46.949Z",
            "xml": "xml_samplesheet_2017_01_07_run_09.xml",
            "status": "NOK",
            "message": "metadata duplicated into iRODS"
         },
         {  
            "date": "2010-01-07T22:11:55.949Z",
            "xml": "xml_samplesheet_2017_01_07_run_09.xml",
            "status": "NOK",
            "message": "metadata was not validated by XSD schema"
         }
      ]
   }
}

我正在使用此命令：

$ cat report-2017-01-07.json 
| jq -s '.data.messages {"date": "2010-01-07T19:55:99.999Z", "xml": "xml_samplesheet_2017_01_07_run_09.xml", "status": "OKKK", "message": "metadata loaded into iRODS successfullyyyyy"}'
jq: error: syntax error, unexpected '{', expecting $end (Unix shell quoting issues?) at <top-level>, line 1:
.data.messages {"date": "2010-01-07T19:55:99.999Z", "xml": "xml_samplesheet_2017_01_07_run_09.xml", "status": "OKKK", "message": "metadata loaded into iRODS successfullyyyyy"}               
jq: 1 compile error

这是我希望输出看起来的样子：

{
    "report": "1.0",
    "data": {
        "date": "2010-01-07",
        "messages": [{
            "date": "2010-01-07T19:58:42.949Z",
            "xml": "xml_samplesheet_2017_01_07_run_09.xml",
            "status": "OK",
            "message": "metadata loaded into iRODS successfully"
        }, {
            "date": "2010-01-07T20:22:46.949Z",
            "xml": "xml_samplesheet_2017_01_07_run_09.xml",
            "status": "NOK",
            "message": "metadata duplicated into iRODS"
        }, {
            "date": "2010-01-07T22:11:55.949Z",
            "xml": "xml_samplesheet_2017_01_07_run_09.xml",
            "status": "NOK",
            "message": "metadata was not validated by XSD schema"
        }, {
            "date": "2010-01-07T19:55:99.999Z",
            "xml": "xml_samplesheet_2017_01_07_run_09.xml",
            "status": "OKKKKKKK",
            "message": "metadata loaded into iRODS successfullyyyyy"
        }]
    }
}

Answer 1

|= .+过滤器中的部件将新元素添加到现有数组。您可以使用jq类似的过滤器：

jq '.data.messages[3] |= . + {"date": "2010-01-07T19:55:99.999Z", "xml": "xml_samplesheet_2017_01_07_run_09.xml", "status": "OKKK", "message": "metadata loaded into iRODS successfullyyyyy"}' inputJson

为避免使用硬编码的长度值3并动态添加新元素，请使用. | length，它返回长度，该长度可用作下一个数组索引，即

jq '.data.messages[.data.messages| length] |= . + {"date": "2010-01-07T19:55:99.999Z", "xml": "xml_samplesheet_2017_01_07_run_09.xml", "status": "OKKK", "message": "metadata loaded into iRODS successfullyyyyy"}' inputJson

（或）根据评论中峰的建议，+=仅使用运算符

jq '.data.messages += [{"date": "2010-01-07T19:55:99.999Z", "xml": "xml_samplesheet_2017_01_07_run_09.xml", "status": "OKKK", "message": "metadata loaded into iRODS successfullyyyyy"}]'

产生所需的输出：

{
  "report": "1.0",
  "data": {
    "date": "2010-01-07",
    "messages": [
      {
        "date": "2010-01-07T19:58:42.949Z",
        "xml": "xml_samplesheet_2017_01_07_run_09.xml",
        "status": "OK",
        "message": "metadata loaded into iRODS successfully"
      },
      {
        "date": "2010-01-07T20:22:46.949Z",
        "xml": "xml_samplesheet_2017_01_07_run_09.xml",
        "status": "NOK",
        "message": "metadata duplicated into iRODS"
      },
      {
        "date": "2010-01-07T22:11:55.949Z",
        "xml": "xml_samplesheet_2017_01_07_run_09.xml",
        "status": "NOK",
        "message": "metadata was not validated by XSD schema"
      },
      {
        "date": "2010-01-07T19:55:99.999Z",
        "xml": "xml_samplesheet_2017_01_07_run_09.xml",
        "status": "OKKK",
        "message": "metadata loaded into iRODS successfullyyyyy"
      }
    ]
  }
}

使用jq-play试运行jq-filter并优化您想要的任何方式。