Tree value being lost in implementation

[nitishsv (Nitish Kumar)]

package main

import (
	"encoding/json"
	"fmt"
)

type employee struct {
	Name      string      `json:"name"`
	Id        int         `json:"id,omitempty"`
	ManagerId int         `json:"managerid"`
	Reporters []employee `json:"reporters,omitempty"`
}

// type employees struct {
// 	employees []employee `json:"employee"`
// }

type EmployeeList struct {
	employees map[int]employee
	root  employee
}

func NewEmployeeList() *EmployeeList {
	var el EmployeeList
	el.employees = make(map[int]employee)
	return &el
}


func (el EmployeeList) CreateMap(employeesInfo []employee) {	 
	for _ , emp := range employeesInfo {
		e := employee{
			Name : emp.Name,
			Id: emp.Id,
			ManagerId: emp.ManagerId,
		}
		el.employees[emp.Id] = e
		if(emp.ManagerId == 0){
			el.root = e
			fmt.Println("CreateMap",el.root)
		}
	}
	fmt.Println("CreateMap2",el.root,el.employees)
}

func (el EmployeeList) getReportersById(empId int) []employee {	 
	reporters := []employee{}
	for _ , employee := range el.employees {
		if(employee.ManagerId == empId){
			reporters = append(reporters, employee)
		}
	}
	return reporters
}

func (el EmployeeList) maketree(e employee) {	 
	//e := root
	e.Reporters = el.getReportersById(e.Id)
	if(true){
		fmt.Println("maketree",e.Id,e.Name,e.Reporters)
	}
	// e.Reporters = reporters
	if(len(e.Reporters) == 0){
		return
	}
	for _ , reporterEmployee := range e.Reporters {
		el.maketree(reporterEmployee);
	}
}

func (el EmployeeList) print(root employee, level int) {	 
	for i:= 0; i<level;i++ {
		fmt.Print("\t");
	}
	fmt.Println(root.Name);
	for _, reporter := range root.Reporters {
		fmt.Println("Enter");
		el.print(reporter, level + 1)
	}
}

func main() {
	//1. Read JSON File
	myJsonString := `[{    "name": "Rob",    "id": 7,    "managerid": 3 }, {    "name": "Rex",    "id": 6,    "managerid": 2 }, {    "name": "Jake",    "id": 5,    "managerid": 2 }, {    "name": "Paul",    "id": 4,    "managerid": 1 }, {    "name": "Oliver",    "id": 3,    "managerid": 1 }, {    "name": "John",    "id": 2,    "managerid": 1 }, {    "name": "Britney",    "id": 1,    "managerid": 0 }]`
	//2. Create class and sent file data
	emplist := NewEmployeeList()
	rawEmployeesInfo := []employee{}
	
	_ = json.Unmarshal([]byte(myJsonString),&rawEmployeesInfo);
	fmt.Println(rawEmployeesInfo);
	emplist.CreateMap(rawEmployeesInfo);
	//fmt.Println(emplist.employees,emplist.root);
	fmt.Println("Main1",emplist.root)
	emplist.maketree(emplist.root);
	//fmt.Println(emplist.root)
	fmt.Println("Main2",emplist.root)
	emplist.print(emplist.root,0)
}

While running the code the value for the tree is lost before printing the contents of the tree. Can someone please let me know what is wrong?

[Yamil_Bracho]

You are passing el*EmployeeList as value receiver. That means goalng creates a local copy and makes changes en that local copy.
Just change to a pointer receiver and your are done
func (el *EmployeeList) CreateMap(employeesInfo []employee) {…