How can I use the Go Validator package in my project?

How can I use the Go Validator package in my project?

You can use the Go Validator package by first installing it with go get github.com/go-playground/validator/v10. Then, you can create a struct and use struct tags to define validation rules.

Can you show me an example of how to validate a struct?

Sure! Here's a simple example:

package main

import (
    "fmt"
    "github.com/go-playground/validator/v10"
)

type User struct {
    Name  string `validate:"required"`
    Email string `validate:"required,email"`
}

func main() {
    validate := validator.New()
    user := User{Name: "", Email: "invalid-email"}
    err := validate.Struct(user)
    if err != nil {
        fmt.Println(err)
    }
}

What happens if the validation fails?

If the validation fails, the validate.Struct(user) method will return an error containing details about which fields failed and why.

Can I customize the error messages?

Yes, you can customize error messages by using the validate.RegisterTranslation method to define your own messages for specific validation tags.