英文:
How to represent this complex data structure with Go structs?
问题
所以我决定再给Go一次机会，但是遇到了困难。大部分Go结构体的示例在文档中都非常简单，我发现了以下的JSON对象表示法，但不知道如何用Go结构体表示：
{id: 1,version: "1.0",method: "someString",params: [{clientid: "string",nickname: "string",level: "string"},[{value: "string","function": "string"}]]}
作为经验丰富的Go开发者，你会如何表示这种有点奇怪的数据？如何初始化结果结构体中的嵌套元素？
英文:
So I decided to give Go another chance but got stuck. Most Go struct examples in documentation are very simple and I found the following JSON object notation that I don't know how to represent with Go structs:
{id: 1,version: "1.0",method: "someString",params: [{clientid: "string",nickname: "string",level: "string"},[{value: "string","function": "string"}]]}
How would you, more experienced gophers, represent that somewhat strange data in Go? And how to initialize the nested elements of the resulting struct?
答案1
得分: 12
我会使用json.RawMessage切片来表示params属性，然后通过一个GetXXX方法将其隐藏起来，以便进行良好的解码。类似于以下方式：
type Outer struct {Id int `json:"id"`Version string `json:"version"`Method string `json:"method"`Params []json.RawMessage `json:"params"`}type Client struct {ClientId string `json:"clientid"`Nickname string `json:"nickname"`Level string `json:"level"`}...obj := Outer{}err := json.Unmarshal([]byte(js), &obj)if err != nil {fmt.Println(err)}fmt.Println(obj.Method) // 输出 "someString"client := Client{}err = json.Unmarshal(obj.Params[0], &client)fmt.Println(client.Nickname) // 输出 "string"
这是一个快速拼凑的示例，第二个param需要你提供一些输入...但基本上你需要将其解码为一个表示该类型的切片。
英文:
I would use a json.RawMessage slice for the params property.. then hide them behind an GetXXX method that decodes it all nicely. Somewhat like this:
type Outer struct {Id int `json:"id"`Version string `json:"version"`Method string `json:"method"`Params []json.RawMessage `json:"params"`}type Client struct {ClientId string `json:"clientid"`Nickname string `json:"nickname"`Level string `json:"level"`}....obj := Outer{}err := json.Unmarshal([]byte(js), &obj)if err != nil {fmt.Println(err)}fmt.Println(obj.Method) // prints "someString"client := Client{}err = json.Unmarshal(obj.Params[0], &client)fmt.Println(client.Nickname) // prints "string"
Working (quickly smashed together at lunch time) sample: http://play.golang.org/p/Gp7UKj6pRK
That second param will need some input from you .. but you're basically looking at decoding it to a slice of whatever type you create to represent it.
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