json-如何将json获取到数组

我运行了一个

aws

命令，结果如下：

[root@webserver-02 test]# aws ec2 describe-volumes --volume-ids vol-0be41aaca50a1d4d2 --profile donald 2> /dev/null|
jq -r '.Volumes[]|{"Tags":(.Tags | map({(.key//.Key): (.value//.Value)}) | add), VolumeId:.VolumeId,SnapshotId:.SnapshotId, Volumesize:.Size, CreateTime:.CreateTime, State:.State,"Instances": [.Attachments[0].InstanceId] }'

{
  "Tags": {
    "Name": "4d2",
    "c": "c",
    "a": "a",
    "b": "b"
  },
  "VolumeId": "vol-0be41aaca50a1d4d2",
  "SnapshotId": "snap-0be43cb27ae60c978",
  "Volumesize": 8,
  "CreateTime": "2018-09-20T02:24:21.067Z",
  "State": "in-use",
  "InstanceId": "i-016c1d0448d6917f6"
}

结果如下：

[root@webserver-02 test]# aws ec2 describe-volumes --volume-ids vol-0be41aaca50a1d4d2 --profile donald 2> /dev/null|
jq -r '.Volumes[]|{"Tags":(.Tags | map({(.key//.Key): (.value//.Value)}) | add), VolumeId:.VolumeId,SnapshotId:.SnapshotId, Volumesize:.Size, CreateTime:.CreateTime, State:.State,"Instances": [.Attachments[0].InstanceId] }'

{
  "Tags": {
    "Name": "4d2",
    "c": "c",
    "a": "a",
    "b": "b"
  },
  "VolumeId": "vol-0be41aaca50a1d4d2",
  "SnapshotId": "snap-0be43cb27ae60c978",
  "Volumesize": 8,
  "CreateTime": "2018-09-20T02:24:21.067Z",
  "State": "in-use",
  "InstanceId": "i-016c1d0448d6917f6"
}

嗯。我想显示InstanceIdjson，如下所示：

{
    "Tags": {
        "Name": "4d2",
        "c": "c",
        "a": "a",
        "b": "b"
    },
    "VolumeId": "vol-0be41aaca50a1d4d2",
    "SnapshotId": "snap-0be43cb27ae60c978",
    "Volumesize": 8,
    "CreateTime": "2018-09-20T02:24:21.067Z",
    "State": "in-use",
    "Instances": [{
        "InstanceId": "i-016c1d0448d6917f6"
    }]
}

---

我正在

bash

shell中使用

jq

。

您可以使用这个jq过滤器：

jq '.+{"Instances":[{InstanceId}]}|del(.InstanceId)' file

这将使用

InstanceId

的值将对象

实例添加到当前JSON数据中

然后删除对象根上的
InstanceId