Golang parse Struct tag example

parsetag.go

package main

import (
	"fmt"
	"log"
	"reflect"
)

type T struct {
	Abc       string `böhöhöyt:"kenya" required:"true"` // supports non ascii
	Cba       string `böhöhöyt:"konya" required:"false"`
	smallcase string `böhöhöyt:"karaambar" required:"true"`
}

func main() {
	var te = T{
		//Abc: "Merhaba Dünya!",
		Cba: "!Dünya Merhaba",
	}

	fmt.Println("te:", te)

	tereflect := reflect.TypeOf(te)
	fmt.Println("te type: ", tereflect.String()) // type

	value := reflect.ValueOf(te)

	for i := 0; i < tereflect.NumField(); i++ {
		field := tereflect.Field(i)

		switch field.Type.Kind() {
		case reflect.String:

			if field.Tag.Get("required") == "true" && value.Field(i).String() == "" {
				log.Println("required but empty!", field.Name)
			}
		}
	}

}