使用jq附加JSON对象

Question

我处于JSON结构的下方

{

    "a": "aVal",
    "x": {
      "x1": "x1Val",
      "x2": "x2Val"
    }
    "y": {
      "y1": "y1Val"
    }
}

我想将"x3": "x3Val","x4": "x4Val"添加到x。因此输出应为

{
    ...
    "x": {
      ....
      "x3": "x3Val",
      "x4": "x4Val",
    }
    ...
}

是否可以使用jq？

Answer 1

是的，只要您在右括号}之后的第8行添加一个逗号（否则jq不会解析您输入的JSON数据）：

$ jq '.x.x3="x3val"|.x.x4="x4val"' file
{
  "a": "aVal",
  "x": {
    "x1": "x1Val",
    "x2": "x2Val",
    "x3": "x3val",
    "x4": "x4val"
  },
  "y": {
    "y1": "y1Val"
  }
}

或者，如果您需要将值作为参数传递，请使用选项--arg：

jq --arg v3 "x3val" --arg v4 "x4val" '.x.x3=$v3|.x.x4=$v4' file

Answer 2

当然， jq 非常简单：

jq '.x += {"x3": "x3Val","x4": "x4Val"}' file.json

输出：

{
  "a": "aVal",
  "x": {
    "x1": "x1Val",
    "x2": "x2Val",
    "x3": "x3Val",
    "x4": "x4Val"
  },
  "y": {
    "y1": "y1Val"
  }
}