Fix: email duplicated key

internal/db/db.go

@@ -49,8 +49,10 @@ const (
 )
 
 func initGuestUser() error {
-	user := model.User{}
-	err := db.Where("id = ?", GuestUserID).First(&user).Error
+	user := model.User{
+		ID: GuestUserID,
+	}
+	err := db.First(&user).Error
 	if err == nil || !errors.Is(err, gorm.ErrRecordNotFound) {
 		return err
 	}

internal/db/user.go

@@ -1,6 +1,7 @@
 package db
 
 import (
+	"database/sql"
 	"errors"
 	"fmt"
 
@@ -65,7 +66,10 @@ func WithRegisteredByProvider(b bool) CreateUserConfig {
 
 func WithEmail(email string) CreateUserConfig {
 	return func(u *model.User) {
-		u.Email = email
+		u.Email = sql.NullString{
+			String: email,
+			Valid:  true,
+		}
 	}
 }
 
@@ -424,7 +428,10 @@ func SetUserHashedPassword(id string, hashedPassword []byte) error {
 }
 
 func BindEmail(id string, email string) error {
-	err := db.Model(&model.User{}).Where("id = ?", id).Update("email", email).Error
+	err := db.Model(&model.User{}).Where("id = ?", id).Update("email", sql.NullString{
+		String: email,
+		Valid:  true,
+	}).Error
 	return HandleNotFound(err, "user")
 }
 
@@ -434,12 +441,12 @@ func UnbindEmail(uid string) error {
 		if err := tx.Where("id = ?", uid).First(&user).Error; err != nil {
 			return HandleNotFound(err, "user")
 		}
-		if user.Email == "" {
+		if user.Email.String == "" {
 			return errors.New("user has no email")
 		}
 		if user.RegisteredByEmail {
 			return errors.New("user must have one email")
 		}
-		return tx.Model(&model.User{}).Where("id = ?", uid).Update("email", "").Error
+		return tx.Model(&model.User{}).Where("id = ?", uid).Update("email", sql.NullString{}).Error
 	})
 }

internal/model/user.go

@@ -1,6 +1,7 @@
 package model
 
 import (
+	"database/sql"
 	"fmt"
 	"math/rand"
 	"time"
@@ -47,7 +48,7 @@ type User struct {
 	UserProviders        []*UserProvider `gorm:"foreignKey:UserID;constraint:OnUpdate:CASCADE,OnDelete:CASCADE"`
 	Username             string          `gorm:"not null;uniqueIndex;type:varchar(32)"`
 	HashedPassword       []byte          `gorm:"not null"`
-	Email                string          `gorm:"type:varchar(128);uniqueIndex:,where:email <> ''"`
+	Email                sql.NullString  `gorm:"type:varchar(128);uniqueIndex"`
 	Role                 Role            `gorm:"not null;default:2"`
 	RoomMembers          []*RoomMember   `gorm:"foreignKey:UserID;constraint:OnUpdate:CASCADE,OnDelete:CASCADE"`
 	Rooms                []*Room         `gorm:"foreignKey:CreatorID;constraint:OnUpdate:CASCADE,OnDelete:CASCADE"`

internal/op/user.go

@@ -1,6 +1,7 @@
 package op
 
 import (
+	"database/sql"
 	"errors"
 	"hash/crc32"
 	"sync/atomic"
@@ -443,7 +444,10 @@ func (u *User) BindEmail(e string) error {
 	if err != nil {
 		return err
 	}
-	u.Email = e
+	u.Email = sql.NullString{
+		String: e,
+		Valid:  true,
+	}
 	return nil
 }
 
@@ -452,30 +456,30 @@ func (u *User) UnbindEmail() error {
 	if err != nil {
 		return err
 	}
-	u.Email = ""
+	u.Email = sql.NullString{}
 	return nil
 }
 
 var ErrEmailUnbound = errors.New("email unbound")
 
 func (u *User) SendTestEmail() error {
-	if u.Email == "" {
+	if u.Email.String == "" {
 		return ErrEmailUnbound
 	}
 
-	return email.SendTestEmail(u.Username, u.Email)
+	return email.SendTestEmail(u.Username, u.Email.String)
 }
 
 func (u *User) SendRetrievePasswordCaptchaEmail(host string) error {
-	if u.Email == "" {
+	if u.Email.String == "" {
 		return ErrEmailUnbound
 	}
 
-	return email.SendRetrievePasswordCaptchaEmail(u.ID, u.Email, host)
+	return email.SendRetrievePasswordCaptchaEmail(u.ID, u.Email.String, host)
 }
 
 func (u *User) VerifyRetrievePasswordCaptchaEmail(e, captcha string) (bool, error) {
-	if u.Email != e {
+	if u.Email.String != e {
 		return false, errors.New("email has changed, please resend the captcha email")
 	}
 	return email.VerifyRetrievePasswordCaptchaEmail(u.ID, e, captcha)

server/handlers/user.go

@@ -32,7 +32,7 @@ func Me(ctx *gin.Context) {
 		Username:  user.Username,
 		Role:      user.Role,
 		CreatedAt: user.CreatedAt.UnixMilli(),
-		Email:     user.Email,
+		Email:     user.Email.String,
 	}))
 }
 
@@ -304,7 +304,7 @@ func SendUserBindEmailCaptcha(ctx *gin.Context) {
 		return
 	}
 
-	if user.Email == req.Email {
+	if user.Email.String == req.Email {
 		ctx.AbortWithStatusJSON(http.StatusBadRequest, model.NewApiErrorStringResp("this email same as current email"))
 		return
 	}