package main

import (
	"fmt"

	"github.com/go-playground/validator/v10"
)

func main() {
	validate := validator.New()

	data := map[string]interface{}{"email": "emailaddress"}
	rules := map[string]interface{}{"email": "required,email"}
	errs := validate.ValidateMap(data, rules) // when VarCtx is called
	fmt.Println(errs)
	//output: map[email:Key: '' Error:Field validation for '' failed on the 'email' tag]
}

package main

import (
	"fmt"

	"github.com/go-playground/validator/v10"
)

func main() {
	validate := validator.New()

	data := map[string]interface{}{"email": "emailaddress"}
	rules := map[string]interface{}{"email": "required,email"}
	errs := validate.ValidateMap(data, rules) // when the new VarWithKeyCtx is called
	fmt.Println(errs)
	//output: map[email:Key: 'email' Error:Field validation for 'email' failed on the 'email' tag]
}