muonsoft / validation

import (

	"fmt"

	"github.com/muonsoft/validation"

	"github.com/muonsoft/validation/it"

	"github.com/muonsoft/validation/validator"

)

type Company struct {

	Name    string

	Address string

}

type Companies []Company

func (companies Companies) Validate(validator *validation.Validator) error {

	violations := validation.ViolationList{}

	for i, company := range companies {

		err := validator.AtIndex(i).Validate(

			validation.StringProperty("name", &company.Name, it.IsNotBlank()),

			validation.StringProperty("address", &company.Address, it.IsNotBlank(), it.HasMinLength(3)),

		)

		// appending violations from err

		err = violations.AppendFromError(err)

		// if append returns a non-nil error we should stop validation because an internal error occurred

		if err != nil {

			return err

		}

	}

	// we should always convert ViolationList into error by calling the AsError method

	// otherwise empty violations list will be interpreted as an error

	return violations.AsError()

}

	// Output:

	// violation at '[1].name': This value should not be blank.

	// violation at '[1].address': This value is too short. It should have 3 characters or more.

}