“sql:结果集中没有行”

我正在处理通过HTML表单发布到Go后端的用户身份验证数据。我正在建设 some boilerplate 要学得更好。

我的问题是 func 返回值:

func (ctrl UserController) Signin(c *gin.Context) {

  var signinForm forms.SigninForm
  user, err := userModel.Signin(signinForm)

  if err := c.ShouldBindWith(&signinForm, binding.Form); err != nil {
      c.JSON(406, gin.H{"message": "Invalid signin form", "form": signinForm})
      c.Abort()
      return
  }

    if err == nil {
        session := sessions.Default(c)
        session.Set("user_id", user.ID)
        session.Set("user_email", user.Email)
        session.Set("user_name", user.Name)
        session.Save()

        c.JSON(200, gin.H{"message": "User signed in", "user": user})
    } else {
        c.JSON(406, gin.H{"message": "Invalid signin details", "error": err.Error()})
    }

}

if 语句验证输入,工作正常(如果电子邮件格式不正确,则出错;如果格式不正确,则无错误)。但是,如果输入正确验证,则 else

{
error: "sql: no rows in result set",
message: "Invalid signin details"
}

在我的 User 型号:

//User ...
type User struct {
    ID        int    `db:"id, primarykey, autoincrement" json:"id"`
    Email     string `db:"email" json:"email"`
    Password  string `db:"password" json:"-"`
    Name      string `db:"name" json:"name"`
    UpdatedAt int64  `db:"updated_at" json:"updated_at"`
    CreatedAt int64  `db:"created_at" json:"created_at"`
}

//UserModel ...
type UserModel struct{}

//Signin ...
func (m UserModel) Signin(form forms.SigninForm) (user User, err error) {

    err = db.GetDB().SelectOne(&user, "SELECT id, email, password, name, updated_at, created_at FROM public.user WHERE email=LOWER($1) LIMIT 1", form.Email)

    if err != nil {
        return user, err
    }

    bytePassword := []byte(form.Password)
    byteHashedPassword := []byte(user.Password)

    err = bcrypt.CompareHashAndPassword(byteHashedPassword, bytePassword)

    if err != nil {
        return user, errors.New("Invalid password")
    }

    return user, nil
}

如何解决 sql: no rows in result set 错误