利用Go语言开发上门做菜系统的菜品推广功能有哪些创新之处？

// 从数据库中获取评论数据
rows, _ := db.Query("SELECT * FROM evaluation WHERE comments LIKE '%" + evaluation + "%'")
var dishes []Dish
for rows.Next() {
    // 获取菜品id
    var dishId int
    rows.Scan(&dishId, _, _)
    // 根据菜品id获取菜品
    dish := GetDishById(dishId)
    // 将菜品添加到结果数组
    dishes = append(dishes, dish)
}
return dishes

// 从数据库中获取收藏列表
rows, _ := db.Query("SELECT collection FROM user WHERE user_id = ?", userId)
var dishes []Dish
for rows.Next() {
    // 获取菜品id
    var dishId int
    rows.Scan(&dishId)
    // 根据菜品id获取菜品
    dish := GetDishById(dishId)
    // 将菜品添加到结果数组
    dishes = append(dishes, dish)
}
return dishes

// 从数据库中获取菜品下单量
rows, _ := db.Query("SELECT dish_id, count(*) as nums FROM orders GROUP BY dish_id")
var dishes []Dish
for rows.Next() {
    // 获取菜品id和下单量
    var dishId int
    var nums int
    rows.Scan(&dishId, &nums)
    // 根据菜品id获取菜品
    dish := GetDishById(dishId)
    // 将菜品附加一个下单量的标签
    dish.Tag = "下单量：" + strconv.Itoa(nums)
    // 将菜品添加到结果数组
    dishes = append(dishes, dish)
}
// 按下单量排序
sort.Slice(dishes, func(i, j int) bool {
    return dishes[i].Orders > dishes[j].Orders
})
return dishes