两种方式，

• 基于模型的Fields方法

dao.User.Where("id",1).Fields("name as `nickname`","id as `uid`").All()

• 基于结构体orm标签的映射关系

type UserData struct {
  Uid int `json:"id" orm:"id"`
  Nickname string `json:"nickname" orm:"name"`
}

var user *entity.User
dao.User.Where("id",1).Scan(&user)