[英]How to support Enum value in Gorm
大家好,我是 go 和 Gorm 的新手,我正在使用 Postgres 构建一个简单的 web 服务,我在获取 model 后遇到了问题,我找到了支持 doum 值的方法。 但是我开始遇到新的错误,在网上研究资源后似乎无法修复。
每当我尝试从数据库中获取用户时,我都会收到此错误:
panic: interface conversion: interface {} is string, not []uint8
-> userservice/models.(*RoleAllowed).Scan
-> /Users/Cipher/work/frontendlabs/shopvending/userservice/models/user.model.go:22
database/sql.convertAssignRows
/usr/local/go/src/database/sql/convert.go:385
database/sql.convertAssignRows
/usr/local/go/src/database/sql/convert.go:428
database/sql.(*Rows).Scan
/usr/local/go/src/database/sql/sql.go:3287
gorm.io/gorm.(*DB).scanIntoStruct
/Users/Cipher/go/pkg/mod/gorm.io/gorm@v1.23.8/scan.go:67
gorm.io/gorm.Scan
/Users/Cipher/go/pkg/mod/gorm.io/gorm@v1.23.8/scan.go:293
gorm.io/gorm/callbacks.Query
/Users/Cipher/go/pkg/mod/gorm.io/gorm@v1.23.8/callbacks/query.go:26
gorm.io/gorm.(*processor).Execute
/Users/Cipher/go/pkg/mod/gorm.io/gorm@v1.23.8/callbacks.go:130
gorm.io/gorm.(*DB).First
/Users/Cipher/go/pkg/mod/gorm.io/gorm@v1.23.8/finisher_api.go:129
userservice/services.UserService.FindUserByEmail
/Users/Cipher/work/frontendlabs/shopvending/userservice/services/user.service.go:25
userservice/handlers.ManualLogin
/Users/Cipher/work/frontendlabs/shopvending/userservice/handlers/auth.handler.go:24
net/http.HandlerFunc.ServeHTTP
/usr/local/go/src/net/http/server.go:2109
github.com/go-chi/chi/v5.(*Mux).routeHTTP
/Users/Cipher/go/pkg/mod/github.com/go-chi/chi/v5@v5.0.7/mux.go:442
net/http.HandlerFunc.ServeHTTP
/usr/local/go/src/net/http/server.go:2109
github.com/go-chi/chi/v5.(*Mux).ServeHTTP
/Users/Cipher/go/pkg/mod/github.com/go-chi/chi/v5@v5.0.7/mux.go:71
github.com/go-chi/chi/v5.(*Mux).Mount.func1
/Users/Cipher/go/pkg/mod/github.com/go-chi/chi/v5@v5.0.7/mux.go:314
net/http.HandlerFunc.ServeHTTP
/usr/local/go/src/net/http/server.go:2109
github.com/go-chi/chi/v5.(*Mux).routeHTTP
/Users/Cipher/go/pkg/mod/github.com/go-chi/chi/v5@v5.0.7/mux.go:442
net/http.HandlerFunc.ServeHTTP
/usr/local/go/src/net/http/server.go:2109
github.com/go-chi/chi/v5/middleware.Timeout.func1.1
/Users/Cipher/go/pkg/mod/github.com/go-chi/chi/v5@v5.0.7/middleware/timeout.go:45
net/http.HandlerFunc.ServeHTTP
/usr/local/go/src/net/http/server.go:2109
userservice/middlewares.CommonMiddleware.func1
/Users/Cipher/work/frontendlabs/shopvending/userservice/middlewares/contentType.go:8
net/http.HandlerFunc.ServeHTTP
/usr/local/go/src/net/http/server.go:2109
github.com/go-chi/chi/v5/middleware.Recoverer.func1
/Users/Cipher/go/pkg/mod/github.com/go-chi/chi/v5@v5.0.7/middleware/recoverer.go:38
net/http.HandlerFunc.ServeHTTP
/usr/local/go/src/net/http/server.go:2109
github.com/go-chi/chi/v5/middleware.RequestLogger.func1.1
/Users/Cipher/go/pkg/mod/github.com/go-chi/chi/v5@v5.0.7/middleware/logger.go:57
net/http.HandlerFunc.ServeHTTP
/usr/local/go/src/net/http/server.go:2109
github.com/go-chi/chi/v5/middleware.RealIP.func1
/Users/Cipher/go/pkg/mod/github.com/go-chi/chi/v5@v5.0.7/middleware/realip.go:35
net/http.HandlerFunc.ServeHTTP
/usr/local/go/src/net/http/server.go:2109
github.com/go-chi/chi/v5/middleware.RequestID.func1
/Users/Cipher/go/pkg/mod/github.com/go-chi/chi/v5@v5.0.7/middleware/request_id.go:76
net/http.HandlerFunc.ServeHTTP
/usr/local/go/src/net/http/server.go:2109
github.com/go-chi/chi/v5.(*Mux).ServeHTTP
/Users/Cipher/go/pkg/mod/github.com/go-chi/chi/v5@v5.0.7/mux.go:88
net/http.serverHandler.ServeHTTP
/usr/local/go/src/net/http/server.go:2947
net/http.(*conn).serve
/usr/local/go/src/net/http/server.go:1991
created by net/http.(*Server).Serve
/usr/local/go/src/net/http/server.go:3102
我试图将字节转换为字符串,但仍然出现错误。
我的用户服务文件:
package services
import (
"github.com/sirupsen/logrus"
"userservice/database"
"userservice/dto"
"userservice/models"
)
type UserService struct{}
//func (u UserService) FindUserById(id int) *models.User {
// user := u.User
// if err := database.Instance.Where("id = ?", id).First(&user); err != nil {
// logrus.Errorf("Can not find user with id %d", id)
// return nil
//
// }
// return user
//
//}
func (u UserService) FindUserByEmail(email string) *models.User {
var user models.User
if err := database.Instance.Where("email = ?", email).First(&user); err.Error != nil {
logrus.Errorf("Can not find user with email %s", err.Error)
return nil
}
return &user
}
func (u UserService) CreateUser(newUser dto.CreateNewUserDTO) *models.User {
createNewUser := models.User{
Email: newUser.Email,
Password: newUser.Password,
}
createNewUser.HashPassword(createNewUser.Password)
err := database.Instance.Create(&createNewUser)
if err.Error != nil {
logrus.Errorf("Error saving food to the database: %s", err.Error)
return nil
}
return &createNewUser
}
问题是当我出于某种原因调用“FindUserByEmail”时它无法序列化。
它一直在工作,直到我介绍了枚举值集成。 现在我得到了上面的错误。
我的用户 model 文件:
package models
import (
"database/sql/driver"
"golang.org/x/crypto/bcrypt"
"gorm.io/gorm"
"time"
)
type RoleAllowed string
const (
admin RoleAllowed = "admin"
seller RoleAllowed = "seller"
rider RoleAllowed = "rider"
regular RoleAllowed = "regular"
)
func (st *RoleAllowed) Scan(value interface{}) error {
*st = RoleAllowed(value.([]byte))
return nil
}
func (st RoleAllowed) Value() (driver.Value, error) {
return string(st), nil
}
type StatusAllowed string
const (
suspended StatusAllowed = "suspended"
active StatusAllowed = "active"
inactive StatusAllowed = "inactive"
)
func (st *StatusAllowed) Scan(value interface{}) error {
*st = StatusAllowed(value.([]byte))
return nil
}
func (st StatusAllowed) Value() (driver.Value, error) {
return string(st), nil
}
type User struct {
ID uint `json:"id" gorm:"type:bigserial;primaryKey;autoIncrement"`
Email string `json:"email" gorm:"type:varchar(255);unique;not null"`
Password string `json:"password" gorm:"type:varchar(255);unique;not null""`
OTPCode int `json:"otp_code"`
Role RoleAllowed `json:"role" gorm:"type:role_allowed;default:'regular'"`
Status StatusAllowed `json:"status" gorm:"type:status_allowed;default:'active'"`
IsEmailVerified bool `json:"isEmailVerified" gorm:"default:false"`
OTPExpireTime time.Time `json:"otp_expire_time"`
CreatedAt time.Time `json:"createdAt"`
UpdatedAt time.Time `json:"updatedAt"`
DeletedAt gorm.DeletedAt `gorm:"index"`
}
func (u *User) HashPassword(password string) error {
bytes, err := bcrypt.GenerateFromPassword([]byte(password), 14)
if err != nil {
return err
}
u.Password = string(bytes)
return nil
}
func (u *User) CheckPasswordHash(password string) error {
err := bcrypt.CompareHashAndPassword([]byte(u.Password), []byte(password))
if err != nil {
return err
}
return nil
}
请有关如何解决此问题的任何帮助?
我在下面编辑了我的代码
package models
import (
"database/sql/driver"
"golang.org/x/crypto/bcrypt"
"gorm.io/gorm"
"time"
)
type RoleAllowed string
const (
admin RoleAllowed = "admin"
seller RoleAllowed = "seller"
rider RoleAllowed = "rider"
regular RoleAllowed = "regular"
)
func (st *RoleAllowed) Scan(value interface{}) error {
b, ok := value.([]byte)
if !ok {
*st = RoleAllowed(b)
}
return nil
}
func (st RoleAllowed) Value() (driver.Value, error) {
return string(st), nil
}
type StatusAllowed string
const (
suspended StatusAllowed = "suspended"
active StatusAllowed = "active"
inactive StatusAllowed = "inactive"
)
func (st *StatusAllowed) Scan(value interface{}) error {
b, ok := value.([]byte)
if !ok {
*st = StatusAllowed(b)
}
return nil
}
func (st StatusAllowed) Value() (driver.Value, error) {
return string(st), nil
}
type User struct {
ID uint `json:"id" gorm:"type:bigserial;primaryKey;autoIncrement"`
Email string `json:"email" gorm:"type:varchar(255);unique;not null"`
Password string `json:"password" gorm:"type:varchar(255);unique;not null""`
OTPCode int `json:"otp_code"`
Role RoleAllowed `json:"role" gorm:"type:role_allowed;default:'regular'"`
Status StatusAllowed `json:"status" gorm:"type:status_allowed;default:'active'"`
IsEmailVerified bool `json:"isEmailVerified" gorm:"default:false"`
OTPExpireTime time.Time `json:"otp_expire_time"`
CreatedAt time.Time `json:"createdAt"`
UpdatedAt time.Time `json:"updatedAt"`
DeletedAt gorm.DeletedAt `gorm:"index"`
}
func (u *User) HashPassword(password string) error {
bytes, err := bcrypt.GenerateFromPassword([]byte(password), 14)
if err != nil {
return err
}
u.Password = string(bytes)
return nil
}
func (u *User) CheckPasswordHash(password string) error {
err := bcrypt.CompareHashAndPassword([]byte(u.Password), []byte(password))
if err != nil {
return err
}
return nil
}
我必须检查类型然后分配我需要的正确值。 谢谢@mkopriva
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