Golang Struct to Map Conversion: A Comprehensive Guide with Example

To convert a Go struct to a map, you can use the reflect package. Here's an example:

package main

import (
	"fmt"
	"reflect"
)

type Person struct {
	Name    string
	Age     int
	Country string
}

func main() {
	p := Person{Name: "John", Age: 30, Country: "USA"}
	m := structToMap(p)
	fmt.Println(m) // Output: map[Name:John Age:30 Country:USA]
}

func structToMap(obj interface{}) map[string]interface{} {
	objValue := reflect.ValueOf(obj)
	objType := objValue.Type()

	result := make(map[string]interface{})
	for i := 0; i < objValue.NumField(); i++ {
		field := objValue.Field(i)
		fieldName := objType.Field(i).Name
		result[fieldName] = field.Interface()
	}

	return result
}

In this example, we define a Person struct with three fields (Name, Age, and Country). We then create an instance of the struct and pass it to the structToMap function. This function uses reflection to iterate over the struct's fields, retrieves their values, and adds them to a map with the field names as keys. Finally, the resulting map is printed to the console.