使用 jq 将一个键的值附加到另一个键，但在文档树的不同级别答案

【问题标题】：Use jq to append value of one key to another key, but at a different level of document tree使用 jq 将一个键的值附加到另一个键，但在文档树的不同级别
【发布时间】：2022-11-11 00:50:12
【问题描述】：

我想将整个 JSON 文件输出到一个新文件，但将 filter-values 的值作为字符串附加到每个 filter 数组中每个 description 的每个 parameters 数组中。

一些注意事项：

我只对foo 对象感兴趣
并非所有foo 对象都包含parameter 数组
并非所有parameter 数组都包含过滤器对象

{
  "empty": {},
  "paths": {
    "somepath": {
      "foo": {
        "parameters": [
          {
            "name": "page"
          },
          {
            "name": "sort"
          },
          {
            "name": "filter",
            "description": "This is the `filter` param."
          },
          {
            "name": "orderby",
            "description": "This is the `orderby` param."
          }
        ],
        "filter-values": [
          "1",
          "2",
          "3"
        ],
        "orderby-values": [
          "a",
          "b",
          "c"
        ]
      },
      "bar": {}
    },
    "anotherpath": {
      "foo": {
        "parameters": [
          {
            "name": "page"
          },
          {
            "name": "filter",
            "description": "This is the `filter` param."
          }
        ],
        "filter-values": [
          "4",
          "5",
          "6"
        ]
      }
    },
    "yetanotherpath": {
      "foo": {
        "parameters": [
          {
            "name": "page"
          }
        ]
      }
    }
  }
}

这是我最接近让它工作的：

(.paths[].foo."filter-values" // empty | join(", ")) as $filters 
| (.paths[].foo.parameters // empty 
| . [] 
| select(.name? == "filter")).description |= . + " Possible values are: " + $filters

预期输出：

{
  "empty": {},
  "paths": {
    "somepath": {
      "foo": {
        "parameters": [
          {
            "name": "page"
          },
          {
            "name": "sort"
          },
          {
            "name": "filter",
            "description": "This is the `filter` param. Possible values are: 1, 2, 3"
          },
          {
            "name": "orderby",
            "description": "This is the `orderby` param."
          }
        ],
        "filter-values": [
          "1",
          "2",
          "3"
        ],
        "orderby-values": [
          "a",
          "b",
          "c"
        ]
      },
      "bar": {}
    },
    "anotherpath": {
      "foo": {
        "parameters": [
          {
            "name": "page"
          },
          {
            "name": "filter",
            "description": "This is the `filter` param. Possible values are: 4, 5, 6"
          }
        ],
        "filter-values": [
          "4",
          "5",
          "6"
        ]
      }
    },
    "yetanotherpath": {
      "foo": {
        "parameters": [
          {
            "name": "page"
          }
        ]
      }
    }
  }
}

实际输出（整个文档产生了两次，在某些情况下，错误的filter-values 附加到description）：

{
  "empty": {},
  "paths": {
    "somepath": {
      "foo": {
        "parameters": [
          {
            "name": "page"
          },
          {
            "name": "sort"
          },
          {
            "name": "filter",
            "description": "This is the `filter` param. Possible values are: 1, 2, 3"
          },
          {
            "name": "orderby",
            "description": "This is the `orderby` param."
          }
        ],
        "filter-values": [
          "1",
          "2",
          "3"
        ],
        "orderby-values": [
          "a",
          "b",
          "c"
        ]
      },
      "bar": {}
    },
    "anotherpath": {
      "foo": {
        "parameters": [
          {
            "name": "page"
          },
          {
            "name": "filter",
            "description": "This is the `filter` param. Possible values are: 1, 2, 3" 
          }
        ],
        "filter-values": [
          "4",
          "5",
          "6"
        ]
      }
    },
    "yetanotherpath": {
      "foo": {
        "parameters": [
          {
            "name": "page"
          }
        ]
      }
    }
  }
}
{
  "empty": {},
  "paths": {
    "somepath": {
      "foo": {
        "parameters": [
          {
            "name": "page"
          },
          {
            "name": "sort"
          },
          {
            "name": "filter",
            "description": "This is the `filter` param. Possible values are: 4, 5, 6"
          },
          {
            "name": "orderby",
            "description": "This is the `orderby` param."
          }
        ],
        "filter-values": [
          "1",
          "2",
          "3"
        ],
        "orderby-values": [
          "a",
          "b",
          "c"
        ]
      },
      "bar": {}
    },
    "anotherpath": {
      "foo": {
        "parameters": [
          {
            "name": "page"
          },
          {
            "name": "filter",
            "description": "This is the `filter` param. Possible values are: 4, 5, 6"
          }
        ],
        "filter-values": [
          "4",
          "5",
          "6"
        ]
      }
    },
    "yetanotherpath": {
      "foo": {
        "parameters": [
          {
            "name": "page"
          }
        ]
      }
    }
  }
}

【问题讨论】：

标签： jq

【解决方案1】：

这会做你想要的吗？

(.paths[].foo | select(has("parameters"))) |= (
  (.parameters[] | select(.name == "filter").description) +=
    " Possible values are: (."filter-values" | join(", "))"
)

{
  "empty": {},
  "paths": {
    "somepath": {
      "foo": {
        "parameters": [
          {
            "name": "page"
          },
          {
            "name": "sort"
          },
          {
            "name": "filter",
            "description": "This is the `filter` param. Possible values are: 1, 2, 3"
          },
          {
            "name": "orderby",
            "description": "This is the `orderby` param."
          }
        ],
        "filter-values": [
          "1",
          "2",
          "3"
        ],
        "orderby-values": [
          "a",
          "b",
          "c"
        ]
      },
      "bar": {}
    },
    "anotherpath": {
      "foo": {
        "parameters": [
          {
            "name": "page"
          },
          {
            "name": "filter",
            "description": "This is the `filter` param. Possible values are: 4, 5, 6"
          }
        ],
        "filter-values": [
          "4",
          "5",
          "6"
        ]
      }
    },
    "yetanotherpath": {
      "foo": {}
    }
  }
}

Demo

【讨论】：