How to build a structure tree from a slice of struct? - go

Question

here are my initial model
type Team struct {
Id string `json:"id"`
Name string `json:"name"`
Level int64 `json:"level"`
}
type TeamTree struct {
Teams []Team `json:"teams"`
Child []TeamTree `json:"child"`
}
Sample data:
id team level
a BOD 1
b Marketing 2
c Dev 2
d Worker 3
I want to have this result (should be a mapping):
{
"teams": [
{"id": "a", "team": "BOD", "level": 1}
],
"child": {
"teams": [
{"id":"b", "team": "marketing", "level": 2},
{"id":"c", "team": "marketing", "level": 2}
],
"child": {
"teams": [
{"id": "d", "team": "worker", "level": 3}
],
"child"": {}
}
}
}
I was told to do self loop, but I do not know how to do it, since I keep getting error and my code cant even run.

Answer 1

This is a full example of what you want
package main
import "log"
type Team struct {
id string
name string
level int64
}
type TeamTree struct {
teams []Team
children []TeamTree
}
func main() {
firstChild := TeamTree{teams: []Team{{id: "firstChildId", name: "First", level: 10}}, children: make([]TeamTree, 0)}
secondChild := TeamTree{teams: []Team{{id: "secondChildId", name: "Second", level: 20}}, children: make([]TeamTree, 0)}
thirdChild := TeamTree{teams: []Team{{id: "thirdChildId", name: "Third", level: 30}}, children: make([]TeamTree, 0)}
rootTeamTree := TeamTree{teams: []Team{{id: "rootId", name: "Root", level: 100}}, children: []TeamTree{firstChild, secondChild, thirdChild}}
log.Println("What's the second child's level:", rootTeamTree.children[1].teams[0].level)
}
And this is the result
2022/06/19 08:24:55 What's the second child's level: 20