使用 jq 获取特定键的所有父键

Question

我想要做的是在我的 json 上“行走”，并为每个名为“base”的键添加一个键，该键是该键的完整“路径”。

这是我的 JSON：

{
  "entity": {
    "product": {
      "att": {
        "number_of_values": "Number of values"
      },
      "title": {
        "base": ["product", "products", "pdt", "pdts"]
      }
    },
    "rabbit": {
      "att": {
        "number_of_values": "Number of values"
      },
      "title": {
        "base": ["rabbit", "rabbits"]
      }
    }
  }
}

我想要这样的结果：

{
  "entity": {
    "product": {
      "att": {
        "number_of_values": "Number of values"
      },
      "title": {
        "base": ["product", "products", "pdt", "pdts"],
        "path": "entity.product.title"
      }
    },
    "rabbit": {
      "att": {
        "number_of_values": "Number of values"
      },
      "title": {
        "base": ["rabbit", "rabbits"]
        "path": "entity.rabbit.title"
      }
    }
  }
}

实际上，我实现了这一点，但我只得到一个子键：

walk(if type == "object" and .base then  keys[] as $k | .base |= {path: $k} else . end)

结果：

{
  "entity": {
    "product": {
      "att": {
        "number_of_values": "Number of values"
      },
      "title": {
        "base": {
          "path": "base"
        }
      }
    },
    "rabbit": {
      "att": {
        "number_of_values": "Number of values"
      },
      "title": {
        "base": {
          "path": "base"
        }
      }
    }
  }
}

我也试过这个：

walk(if type == "object" and .base then  paths(..) as $v | .base |= {path: $v} else . end)

结果：

{
  "entity": {
    "product": {
      "att": {
        "number_of_values": "Number of values"
      },
      "title": {
        "base": {
          "path": [
            "base",
            3
          ]
        }
      }
    },
    "rabbit": {
      "att": {
        "number_of_values": "Number of values"
      },
      "title": {
        "base": {
          "path": [
            "base",
            1
          ]
        }
      }
    }
  }
}

非常感谢您的建议和专业知识！

Answer 1

这是一种方法：

reduce paths(objects | has("base")) as $p (.;
  setpath($p + ["path"]; $p | join("."))
)

^在线演示

Answer 2

您可以使用path获取路径的数组表示，使用join连接它（假设简单，类似标识符的字段名称），并使用setpath设置它：

jq '
  reduce path((.. | objects | select(.base))) as $p (.;
    setpath($p + ["path"]; $p | join("."))
  )
'

{
  "entity": {
    "product": {
      "att": {
        "number_of_values": "Number of values"
      },
      "title": {
        "base": [
          "product",
          "products",
          "pdt",
          "pdts"
        ],
        "path": "entity.product.title"
      }
    },
    "rabbit": {
      "att": {
        "number_of_values": "Number of values"
      },
      "title": {
        "base": [
          "rabbit",
          "rabbits"
        ],
        "path": "entity.rabbit.title"
      }
    }
  }
}

演示

Answer 3

这是关于path 、 paths 、 setpath和objects的真正学习体验。 在阅读其他答案之前，我显然重新实现setpath ：

def add_path(p; val):
    if p|length == 0
    then .path = val
    else .[p[0]] |= add_path(p[1:]; val)
    end;

reduce ([paths(..) | select(last == "base")] | unique | map(.[:-1]))[] as $path (.;
    add_path($path; ($path | join(".")))
)