Implementation method of menu management function in food ordering system developed with Go language

In recent years, with the development of mobile Internet, ordering systems have become more and more popular in the catering industry. In order to improve customer experience and reduce human resources, the menu management function of the ordering system is particularly important. In this article, we will introduce how to use Go language to implement menu management functions and provide detailed code examples.

1. Requirements analysis of menu management function

Before implementing the menu management function, the requirements first need to be analyzed. We need to determine the attributes of the menu based on the actual situation, including dish names, prices, pictures, descriptions, etc. In addition, the menu also needs to be classified and managed to facilitate users to find their favorite dishes.

1. Definition of dish attributes

When defining dish attributes, factors that need to be considered include dish name, price, picture, description, etc. We can use a structure to package these attributes, example The code is as follows:

type Dish struct {
    Name string
    Price float64
    Image string
    Description string
}

2. Menu classification definition

In order to facilitate user search, we need to classify and manage the dishes. Here, we can use Map to manage dish categories. The sample code is as follows:

type Menu struct {
    Items map[string][]Dish
}

In this structure, Items is a Map, where Key represents the category name and Value is the list of dishes.

2. Code implementation of menu management function

In the above demand analysis, we determined the definition of dish attributes and menu classification. Below we will introduce how to use Go language to implement these functions. .

1. Add new dishes

In the ordering system, the administrator needs to add new dishes to the menu. The following is an example function that can implement new functions of dishes:

func AddDish(item string, dish Dish, menu *Menu) {
    if _, ok := menu.Items[item]; !ok {
        menu.Items[item] = make([]Dish, 0)
    }
    menu.Items[item] = append(menu.Items[item], dish)
}

In this function, we first determine whether the category exists, and if not, create a new category. Add new items to the menu.

2. Dishes update

In the ordering system, the administrator needs to update the dishes. The following is an example function that can implement the update function of dishes:

func UpdateDish(item string, dish Dish, menu *Menu) bool {
    dishes, ok := menu.Items[item]
    if !ok {
        return false
    }
    for i, d := range dishes {
        if d.Name == dish.Name {
            dishes[i] = dish
            return true
        }
    }
    return false
}

In this function, we first search for the dish with the same name as the incoming dish from the Map. If found, update the dish attributes and price, and return true, otherwise false is returned.

3. Delete dishes

In the ordering system, the administrator needs to delete dishes. The following is an example function that can implement the dish deletion function:

func DeleteDish(item string, dishName string, menu *Menu) bool {
    dishes, ok := menu.Items[item]
    if !ok {
        return false
    }
    for i, dish := range dishes {
        if dish.Name == dishName {
            menu.Items[item] = append(dishes[:i], dishes[i+1:]...)
            return true
        }
    }
    return false
}

In this function, we first search the Map for the dish with the same name as the incoming dish. If found, delete the dish from the list and return true, otherwise false is returned.

4. Dishes Query

In the ordering system, users need to query the dishes in the menu. The following is an example function that can implement the query function:

func FindDish(item string, dishName string, menu *Menu) *Dish {
    dishes, ok := menu.Items[item]
    if !ok {
        return nil
    }
    for _, dish := range dishes {
        if dish.Name == dishName {
            return &dish
        }
    }
    return nil
}

In this function, we first search for the dish with the same name as the passed-in dish from the Map. If found, return the pointer of the dish, otherwise return nil .

3. Summary

This article introduces how to use Go language to implement the menu management function. Before implementation, we conducted a demand analysis and determined the definition of dish attributes and menu classification. Then, use structures and Maps to implement the functions of adding, updating, deleting and querying dishes.

It is worth noting that in actual development, we need to carry out more detailed design according to business needs to ensure that the menu management function is more complete and stable. At the same time, we also need to conduct detailed testing and optimization to improve system performance and user experience.

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