Bdtjtk

I use Joi to do object schema and data validation in JavaScript. In Golang, I know how to do schema validation, but how do I do data validation?

Is there a Joi equivalient for Golang? I am aware of Godog, but it hasn't reached 1.0 yet.

Try ozzo-validation https://github.com/go-ozzo/ozzo-validation

package main



import (

    "fmt"

    "regexp"



    "github.com/go-ozzo/ozzo-validation"

    "github.com/go-ozzo/ozzo-validation/is"

)



type Address struct {

    Street string

    City   string

    State  string

    Zip    string

}



func (a Address) Validate() error {

    return validation.ValidateStruct(&a,

        // Street cannot be empty, and the length must between 5 and 50

        validation.Field(&a.Street, validation.Required, validation.Length(5, 50)),

        // City cannot be empty, and the length must between 5 and 50

        validation.Field(&a.City, validation.Required, validation.Length(5, 50)),

        // State cannot be empty, and must be a string consisting of two letters in upper case

        validation.Field(&a.State, validation.Required, validation.Match(regexp.MustCompile("^[A-Z]{2}$"))),

        // State cannot be empty, and must be a string consisting of five digits

        validation.Field(&a.Zip, validation.Required, validation.Match(regexp.MustCompile("^[0-9]{5}$"))),

    )

}



func main() {

    a := Address{

        Street: "123",

        City:   "Unknown",

        State:  "Virginia",

        Zip:    "12345",

    }



    err := a.Validate()

    fmt.Println(err)

    // Output:

    // Street: the length must be between 5 and 50; State: must be in a valid format.

}