Go 语言中 JSON 嵌套结构体

Question

我有以下 JSON

[{
  "id": 8,
  "title": "Indonesia",
  "type": "country",
  "attributes": {
    "regionCode": "ID",
    "information": {
      "title": "Welcome to Indonesia",
      "content": "We only serve selected areas in Indonesia.",
      "image": "indo.png"
    }
  },
  "children": [
    {
      "id": 9,
      "title": "Jakarta",
      "type": "city",
      "attributes": {
        "regionCode": "ID-JKT",
        "information": {
          "title": "Welcome to Capital City of Indonesia",
          "content": "We only serve selected areas in Jabotabek",
          "image": "jakarta.png"
        }
      }       
    },
    {
      "id": 10,
      "title": "Bali",
      "type": "city",
      "attributes": {
        "regionCode": "ID-BAL",
        "information": {
          "title": "Welcome to the beach city Bali",
          "content": "We only serve selected areas in Bali.",
          "image": "bali.png"
        }   
      }       
    }
  ]
}]

从技术上讲，这是一个将其自身作为子节点的嵌套结构，并且子节点也可能有子节点。但当我使用 unmarshal 来解码它时，我就是无法得到正确的结果。

工作如下我可以将属性定义为单独的结构，因此假设我有 locationAttribute 结构

type locationNode []struct {
    ID         string             `json:"id"`
    Title      string             `json:"title"`
    Type       string             `json:"type"`
    Attributes locationAttribute `json:"attributes"`
    Children   []struct {
        ID         string             `json:"id"`
        Title      string             `json:"title"`
        Type       string             `json:"type"`
        Attributes locationAttribute `json:"attributes"`
        Children   []interface{}      `json:"children"`
    } `json:"children"`
}

但是我希望像下面这样

type locationNode []struct {
    ID         string             `json:"id"`
    Title      string             `json:"title"`
    Type       string             `json:"type"`
    Attributes locationAttribute `json:"attributes"`
    Children   []locationNode `json:"children"`
}

任何帮助将不胜感激

Answer 1

除了在 JSON 文本中 "id" 字段是数字而不是 字符串 之外，它对我有用。

省略“属性”以使示例更短:

type locationNode struct {
    ID       int            `json:"id"`
    Title    string         `json:"title"`
    Type     string         `json:"type"`
    Children []locationNode `json:"children"`
}

func main() {
    ln := locationNode{}

    err := json.Unmarshal([]byte(src), &ln)

    fmt.Printf("%+v %v\n", ln, err)
}

const src = `{
  "id": 8,
  "title": "Indonesia",
  "type": "country",
  "attributes": {
    "regionCode": "ID",
    "information": {
      "title": "Welcome to Indonesia",
      "content": "We only serve selected areas in Indonesia.",
      "image": "indo.png"
    }
  },
  "children": [
    {
      "id": 9,
      "title": "Jakarta",
      "type": "city",
      "attributes": {
        "regionCode": "ID-JKT",
        "information": {
          "title": "Welcome to Capital City of Indonesia",
          "content": "We only serve selected areas in Jabotabek",
          "image": "jakarta.png"
        }
      }       
    },
    {
      "id": 10,
      "title": "Bali",
      "type": "city",
      "attributes": {
        "regionCode": "ID-BAL",
        "information": {
          "title": "Welcome to the beach city Bali",
          "content": "We only serve selected areas in Bali.",
          "image": "bali.png"
        }   
      }       
    }
  ]
}`

输出(在 Go Playground 上尝试):

{ID:8 Title:Indonesia Type:country Children:[{ID:9 Title:Jakarta Type:city Children:[]} {ID:10 Title:Bali Type:city Children:[]}]} <nil>