Envelope/Backend/Models/Users.go

package Models

import (
	"gorm.io/gorm"
)

// Prevent updating the email if it has not changed
// This stops a unique constraint error
func (u *User) BeforeUpdate(tx *gorm.DB) (err error) {
	if !tx.Statement.Changed("Username") {
		tx.Statement.Omit("Username")
	}
	return nil
}

type User struct {
	Base
	Username             string `gorm:"not null;unique" json:"username"`
	Password             string `gorm:"not null" json:"password"`
	ConfirmPassword      string `gorm:"-" json:"confirm_password"`
	AsymmetricPrivateKey []byte `gorm:"not null" json:"asymmetric_private_key"` // Stored encrypted
	AsymmetricPublicKey  []byte `gorm:"not null" json:"asymmetric_public_key"`
}