使用golang生成嵌套的JSON

Question

So what am I doing wrong here, am not really understanding how to generate a nested JSON structure:

I am getting "missing type in composite literal" exception. https://play.golang.org/p/pA1fpbQHbb0

package main

import "fmt"

type FamilyRequestBody struct {
    Family string `json:"family"`
}

type DataRequestBody struct {
    Family FamilyRequestBody `json:"family"`
}

type EventRequestBody struct {
    Account string `json:"account"`
    Player  string `json:"player"`
    Count   int    `json:"count"`
}

type TeamRequestBody struct {
    Account string `json:"account"`
    Team    string `json:"team"`
}

type PlayerRequestBody struct {
    Account string          `json:"account"`
    Team    string          `json:"team"`
    Player  string          `json:"player"`
    Data    DataRequestBody `json:"data"`
}

func main() {
    l := PlayerRequestBody{
        Account: "my-account",
        Team:    "12345",
        Player:  "23424234",
        Data:    {Family: "12345"},
    }

    fmt.Printf("%#v
", l)
}

Answer 1

Its pretty straight forward, you definded it like this:

type PlayerRequestBody struct {
    Account string          `json:"account"`
    Team    string          `json:"team"`
    Player  string          `json:"player"`
    Data    DataRequestBody `json:"data"`

 l := PlayerRequestBody{
        Account: "my-account",
        Team:    "12345",
        Player:  "23424234",
        Data:    DataRequestBody{FamilyRequestBody{Family:"hello"}},
    }

but wanted it to use it like that:

type PlayerRequestBody struct {
    Account string           `json:"account"`
    Team    string           `json:"team"`
    Player  string           `json:"player"`
    Data    FamilyRequestBody`json:"family"`

 l := PlayerRequestBody{
        Account: "my-account",
        Team:    "12345",
        Player:  "23424234",
        Data:    {Family:"hello"}},
    }

Your field Data is from type DataRequestBody like defined in your struct, you cant put another struct there. In golang there is no such thing as inheritance, and that is probably not what you wanted either.

I agree that OP´s question is not JSON related, like Flimzy mentioned in the comments, but i leave the links for good measures.

If that is not what you wanted, check out the many other questions explaining how json with go works, or use gobyexample, or the docs.