how to convert map to struct in golang?
September 06, 2022Hi Friends 👋,
Welcome To aGuideHub! ❤️
To convert map to struct in golang,
- First convert it JSON using
json.Marshal()method - Then convert JSON string to struct using
json.Unmarshal()method
it will convert map to struct. just you have to covert to MAP to JSON and then JSON to struct.
Follow the below tutorial if you are struggling with installing GO in windows.
https://aguidehub.com/blog/how-to-install-golang-in-windows/
Today, I will show you how do I convert a map to struct in golang, as above mentioned I’m going to use json.Marshal() and json.Unmarshal() method.
To use the json.Marshal() and json.Unmarshal() method, we have first import "encoding/json" package, then we have to create struct variable which we will use to assign value.
Let’s start our Golang convert map to struct example
main.go
package main
import (
"encoding/json"
"fmt"
)
func main() {
// map data
mapData := map[string]interface{}{
"Name": "noknow",
"Age": 2,
"Admin": true,
"Hobbies": []string{"IT","Travel"},
"Address": map[string]interface{}{
"PostalCode": 1111,
"Country": "Japan",
},
"Null": nil,
}
// struct - Need to be defined according to the above map data.
type Addr struct {
PostalCode int
Country string
}
type Me struct {
Name string
Age int
Admin bool
Hobbies []string
Address Addr
Null interface{}
}
// Convert map to json string
jsonStr, err := json.Marshal(mapData)
if err != nil {
fmt.Println(err)
}
// Convert json string to struct
var me Me
if err := json.Unmarshal(jsonStr, &me); err != nil {
fmt.Println(err)
}
// Output
fmt.Println(me)
}In the above example, we have converted the map to struct and printed in golang console. let’s check the output.
Output
{noknow 2 true [IT Travel] {1111 Japan} <nil>}I hope it helps you, All the best 👍.
