How to use Go language to develop the customer feedback function of the ordering system

How to use Go language to develop the customer feedback function of the ordering system

Introduction:
With the development of technology, more and more restaurants are beginning to use ordering system catering system to provide more convenient services. A good ordering system should not only have efficient ordering and checkout functions, but also consider customer feedback. This article will introduce how to use Go language to develop the customer feedback function of the ordering system and provide specific code examples.

1. Customer feedback needs analysis:
   Before developing the customer feedback function of the ordering system, we need to conduct a needs analysis first. According to the actual situation, we can divide customer feedback into two categories: opinion feedback and rating feedback. Opinion feedback is used for customers' suggestions and opinions for improving restaurant services, and rating feedback is used for customers' satisfaction scores with the restaurant's overall service.
2. Database design:
   In order to implement the customer feedback function, we need to design a database to store feedback data. In this example, we can create a feedback table containing the following fields:
3. id: the unique identifier of the feedback record
4. customer_id: the unique identifier of the customer
5. content: feedback The specific content
6. type: the type of feedback (opinion or rating)
7. rating: the score of the rating feedback
8. created_at: the creation time of the feedback record
9. Develop customer feedback API:
   In Go language, you can use the net/http package of the standard library to develop API. We can create the following APIs to implement the customer feedback function:
10. POST /feedback: Create a new feedback record
11. GET /feedback/{id}: Get the feedback record with the specified id
12. GET /feedbacks: Get all feedback records

Code example:

package main

import (

"database/sql"
"encoding/json"
"log"
"net/http"

"github.com/gorilla/mux"
_ "github.com/go-sql-driver/mysql"

)

// Feedback struct
type Feedback struct {

ID         int    `json:"id,omitempty"`
CustomerID int    `json:"customer_id,omitempty"`
Content    string `json:"content,omitempty"`
Type       string `json:"type,omitempty"`
Rating     int    `json:"rating,omitempty"`
CreatedAt  string `json:"created_at,omitempty"`

}

var db *sql.DB

// CreateFeedback - create a new feedback
func CreateFeedback(w http.ResponseWriter, r *http.Request) {

w.Header().Set("Content-Type", "application/json")

var feedback Feedback
_ = json.NewDecoder(r.Body).Decode(&feedback)

insert, err := db.Query("INSERT INTO feedback (customer_id, content, type, rating) VALUES (?,?,?,?)", feedback.CustomerID, feedback.Content, feedback.Type, feedback.Rating)
if err != nil {
    log.Fatal(err)
}
defer insert.Close()

json.NewEncoder(w).Encode(feedback)

}

// GetFeedbackByID - get feedback by ID
func GetFeedbackByID(w http.ResponseWriter , r *http.Request) {

w.Header().Set("Content-Type", "application/json")

params := mux.Vars(r)
id := params["id"]

row := db.QueryRow("SELECT * FROM feedback WHERE id = ?", id)
var feedback Feedback
err := row.Scan(&feedback.ID, &feedback.CustomerID, &feedback.Content, &feedback.Type, &feedback.Rating, &feedback.CreatedAt)
if err != nil {
    log.Fatal(err)
}
json.NewEncoder(w).Encode(feedback)

}

// GetFeedbacks - get all feedbacks
func GetFeedbacks(w http.ResponseWriter, r *http.Request) {

w.Header().Set("Content-Type", "application/json")

var feedbacks []Feedback

rows, err := db.Query("SELECT * FROM feedback")
if err != nil {
    log.Fatal(err)
}

defer rows.Close()

for rows.Next() {
    var feedback Feedback
    err := rows.Scan(&feedback.ID, &feedback.CustomerID, &feedback.Content, &feedback.Type, &feedback.Rating, &feedback.CreatedAt)
    if err != nil {
        log.Fatal(err)
    }
    feedbacks = append(feedbacks, feedback)
}

json.NewEncoder(w).Encode(feedbacks)

}

func main() {

router := mux.NewRouter().StrictSlash(true)

// Define routes
router.HandleFunc("/feedback", CreateFeedback).Methods("POST")
router.HandleFunc("/feedback/{id}", GetFeedbackByID).Methods("GET")
router.HandleFunc("/feedbacks", GetFeedbacks).Methods("GET")

// Open database connection
var err error
db, err = sql.Open("mysql", "username:password@tcp(localhost:3306)/database_name")
if err != nil {
    log.Fatal(err)
}

defer db.Close()

// Start server
log.Fatal(http.ListenAndServe(":8080", router))

}

Summary:
Through the above steps, we can use Go language to develop a simple point Customer feedback function of the restaurant system. By creating a database, developing corresponding APIs, and using standard libraries and third-party libraries for code development, we can implement customer feedback functions and provide restaurants with a comprehensive customer experience. Of course, this is just a simple example. In actual projects, more details and functions need to be considered, such as identity authentication, paging, etc. I hope this article can help you and enable you to better use Go language to develop the customer feedback function of the ordering system.

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