


Go language development of door-to-door cooking system: How to implement the dish collection function?
Go language development of door-to-door cooking system: How to implement the dish collection function?
With the improvement of living standards, more and more people choose to have chefs come to cook for them. The door-to-door cooking system emerged as the times require, providing users with a convenient service platform. When developing such a system, the dish collection function is one of the most important functions. This article will introduce how to use Go language to develop a door-to-door cooking system and implement the dish collection function.
1. Project Requirements Analysis
Before starting development, we first need to understand the specific requirements of the dish collection function. Usually, users can find their favorite dishes by browsing the menu or searching for dishes, and add them to their favorites to facilitate future search and ordering.
Based on this requirement, we can design the following data structure:
- User (User): basic information of the user, including user ID, user name, etc.
- Dish: Basic information of the dish, including dish ID, dish name, price, etc.
- Favorite: A list of dishes collected by the user. Each user corresponds to a favorite, including user ID and dish ID.
2. Database design and table creation
We use MySQL as the database. Based on the requirements, we need to create three tables: user, dish and favorite.
The user table (user) structure is as follows:
CREATE TABLE user
(
id
int(11) NOT NULL AUTO_INCREMENT,
name
varchar(255) NOT NULL,
PRIMARY KEY (id
)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
Dish table (dish) structure As follows:
CREATE TABLE dish
(
id
int(11) NOT NULL AUTO_INCREMENT,
name
varchar(255) NOT NULL,
price
decimal(10,2) NOT NULL,
PRIMARY KEY (id
)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
The favorites table (favorite) structure is as follows:
CREATE TABLE favorite
(
id
int(11) NOT NULL AUTO_INCREMENT,
user_id
int(11) NOT NULL,
dish_id
int(11) NOT NULL,
PRIMARY KEY (id
),
KEY idx_user_id
(user_id
),
KEY idx_dish_id
(dish_id
),
CONSTRAINT fk_user_id
FOREIGN KEY (user_id
) REFERENCES user
(id
),
CONSTRAINT fk_dish_id
FOREIGN KEY (dish_id
) REFERENCES dish
(id
)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
3. Go language implementation
Next, we use Go language to implement the dish collection function. First, we need to define the corresponding structure to map with the table in the database:
type User struct {
ID int `json:"id"` Name string `json:"name"`
}
type Dish struct {
ID int `json:"id"` Name string `json:"name"` Price float64 `json:"price"`
}
type Favorite struct {
ID int `json:"id"` UserID int `json:"user_id"` DishID int `json:"dish_id"`
}
Next, we need to write the corresponding API interface to implement the dish collection function. The following is some sample code:
- Get the list of user’s favorite dishes
func GetUserFavorite(userID int) ([]Dish, error) {
favorites := make([]Favorite, 0) dishes := make([]Dish, 0) err := db.Where("user_id = ?", userID).Find(&favorites).Error if err != nil { return nil, err } for _, favorite := range favorites { dish := Dish{} err := db.Where("id = ?", favorite.DishID).First(&dish).Error if err != nil { return nil, err } dishes = append(dishes, dish) } return dishes, nil
}
- Add dishes to user favorites
func AddDishToFavorite(userID, dishID int) error {
favorite := Favorite{ UserID: userID, DishID: dishID, } err := db.Create(&favorite).Error if err != nil { return err } return nil
}
The above sample code shows how to use Go language to implement the dish collection function. By defining the structure and writing the corresponding API interface, we can operate the favorites according to user needs, including obtaining the list of favorite dishes and adding dishes to the favorites.
4. Summary
In this article, we introduce how to use Go language to develop a door-to-door cooking system and implement the dish collection function. By designing data structures, building tables and writing API interfaces, we can meet user needs and provide a convenient and fast dish collection function. Of course, this is just a simple example, and some other factors may need to be considered in actual projects, such as dish classification, modification of collections, etc.
The above is the detailed content of Go language development of door-to-door cooking system: How to implement the dish collection function?. For more information, please follow other related articles on the PHP Chinese website!

InterfacesandpolymorphisminGoenhancecodereusabilityandmaintainability.1)Defineinterfacesattherightabstractionlevel.2)Useinterfacesfordependencyinjection.3)Profilecodetomanageperformanceimpacts.

Article discusses iterating through maps in Go, focusing on safe practices, modifying entries, and performance considerations for large maps.Main issue: Ensuring safe and efficient map iteration in Go, especially in concurrent environments and with l

The article discusses creating and manipulating maps in Go, including initialization methods and adding/updating elements.

The article discusses differences between arrays and slices in Go, focusing on size, memory allocation, function passing, and usage scenarios. Arrays are fixed-size, stack-allocated, while slices are dynamic, often heap-allocated, and more flexible.

The article discusses creating and initializing slices in Go, including using literals, the make function, and slicing existing arrays or slices. It also covers slice syntax and determining slice length and capacity.

The article explains how to create and initialize arrays in Go, discusses the differences between arrays and slices, and addresses the maximum size limit for arrays. Arrays vs. slices: fixed vs. dynamic, value vs. reference types.

Article discusses syntax and initialization of structs in Go, including field naming rules and struct embedding. Main issue: how to effectively use structs in Go programming.(Characters: 159)

The article explains creating and using pointers in Go, discussing benefits like efficient memory use and safe management practices. Main issue: safe pointer use.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

SublimeText3 Chinese version
Chinese version, very easy to use

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
