Question

我有一个API，它将组成员身份报告为一个数组，其中每个组都是一个包含成员数组的数组元素。我想简化数据，但不要删除数组边界。

如果有三个组API生成此输出，请将其命名为“3gr.json”：

[
   {
      "id" : "000E58D2E9B401400",
      "members" : [
         {
            "id" : "000E58D2E9B401400",
            "roomName" : "Room1",
            "groupState" : {
               "mute" : false,
               "volume" : 15
            },
            "state" : {
               "playbackState" : "STOPPED",
               "volume" : 15,
               "mute" : false
            }
         }
      ]
   },
   {
      "id" : "000E58D2FA0601400",
      "members" : [
         {
            "state" : {
               "playbackState" : "STOPPED",
               "volume" : 40,
               "mute" : false
            },
            "id" : "000E58D2FA0601400",
            "roomName" : "Room2",
            "groupState" : {
               "mute" : false,
               "volume" : 40
            }
         }
      ]
   },
   {
      "id" : "5CAAFD7B8C9801400",
      "members" : [
         {
            "groupState" : {
               "mute" : false,
               "volume" : 15
            },
            "roomName" : "Room3",
            "id" : "5CAAFD7B8C9801400",
            "state" : {
               "mute" : false,
               "playbackState" : "STOPPED",
               "volume" : 15
            }
         }
      ]
   }
]

如果有一个组，API会产生此输出，请将其命名为“1gr.json”：

[
  {
    "id": "000E58D2E9B401400",
    "members": [
      {
        "id": "000E58D2E9B401400",
        "state": {
          "volume": 44,
          "mute": false,
          "playbackState": "PAUSED_PLAYBACK",
          "equalizer": {
            "bass": 2,
            "treble": 2,
            "loudness": true
          }
        },
        "roomName": "Room1",
        "groupState": {
          "volume": 46,
          "mute": false
        }
      },
      {
        "id": "5CAAFDE9614001400",
        "state": {
          "volume": 54,
          "mute": false,
          "playbackState": "PAUSED_PLAYBACK",
          "equalizer": {
            "bass": 0,
            "treble": 0,
            "loudness": true
          }
        },
        "roomName": "Room2",
        "groupState": {
          "volume": 65,
          "mute": false
        }
      },
      {
        "id": "5CAAFD7B8C9801400",
        "state": {
          "volume": 41,
          "mute": false,
          "playbackState": "PAUSED_PLAYBACK",
          "equalizer": {
            "bass": 0,
            "treble": 0,
            "loudness": false
          }
        },
        "roomName": "Room3",
        "groupState": {
          "volume": 41,
          "mute": false
        }
      }
    ]
  }
]

如果我使用jq来处理此输出：

jq '.[].members[]|{name: .roomName, state: .state.playbackState, vol: .state.volume}' 3gr.json

我明白了：

{
  "name": "Room1",
  "state": "STOPPED",
  "vol": 15
}
{
  "name": "Room2",
  "state": "STOPPED",
  "vol": 40
}
{
  "name": "Room3",
  "state": "STOPPED",
  "vol": 15
}

我得到了相同的输出结构（在这两个例子中，值并不重要），如果我处理'1gr.json'：

{
  "name": "Room1",
  "state": "PAUSED_PLAYBACK",
  "vol": 44
}
{
  "name": "Room2",
  "state": "PAUSED_PLAYBACK",
  "vol": 54
}
{
  "name": "Room3",
  "state": "PAUSED_PLAYBACK",
  "vol": 41
}

我想要的是保留组数组的数组边界。我尝试添加[ ]的各种组合，但无济于事。所以我想看到的是：

[
    [
        {
            "name": "Room1",
            "state": "PAUSED_PLAYBACK",
            "vol": 44
        },
        {
            "name": "Room2",
            "state": "PAUSED_PLAYBACK",
            "vol": 54
        },
        {
            "name": "Room3",
            "state": "PAUSED_PLAYBACK",
            "vol": 41
        }
    ]
]

和

[
    [
        {
            "name": "Room1",
            "state": "PAUSED_PLAYBACK",
            "vol": 44
        }
    ],
    [
        {
            "name": "Room2",
            "state": "PAUSED_PLAYBACK",
            "vol": 54
        }
    ],
    [
        {
            "name": "Room3",
            "state": "PAUSED_PLAYBACK",
            "vol": 41
        }
    ]
]

Answer 1

从本质上讲，您应该使用map代替.[]。

map(.members
    | map({name: .roomName, state: .state.playbackState, vol: .state.volume}) )

（由于map(f)只是[.[]|f]，您也可以使用后一种形式，但写map会使意图非常明确。）

jq保留数组边界

1 个答案: