Golang framework common problems and solutions

Common Go framework problems and their solutions include: Controller cannot be injected: Make sure the controller is registered in the main function. Model cannot be injected: Make sure the model is registered in the main function. Route registration failed: Check the uniqueness of the routing path and the correctness of the configuration. Database connection failed: Check the correctness of the database connection string or server operation. Static files cannot be accessed: Check the correctness of the file path and file configuration.

Go framework common problems and solutions

When using the Go framework to develop applications, you may encounter some common problems question. This article describes these common problems and their solutions.

1. The controller cannot be injected

This problem is usually caused by dependencies not being registered correctly. Make sure the controller is properly registered in your application's main function or init function.

func main() {
  mux := http.NewServeMux()
  router := gin.New()

  // 注册控制器
  router.Use(gin.Recovery())
  router.GET("/users", usersController.Index)
  router.POST("/users", usersController.Create)

  mux.Handle("/", router)
  http.ListenAndServe(":8080", mux)
}

2. Model cannot be injected

Similar to controller injection, model injection problems are usually caused by dependencies not being registered correctly. Make sure the model is properly registered in your application's main function or init function.

func init() {
  db, err := gorm.Open("mysql", "user:password@tcp(localhost:3306)/database")
  if err != nil {
    panic(err)
  }

  // 注册模型
  db.AutoMigrate(&User{})
}

3. Route registration failure

Route registration failure is usually caused by routing path conflicts or incorrect routing configuration. Check whether the routing path is unique and the routing configuration is correct.

func main() {
  mux := http.NewServeMux()
  router := gin.New()

  // 注册路由
  router.GET("/users", usersController.Index)
  router.POST("/users", usersController.Create)

  // 冲突的路由
  // router.GET("/users", usersController.Show)

  mux.Handle("/", router)
  http.ListenAndServe(":8080", mux)
}

4. Database connection failure

Database connection failure is usually caused by incorrect database configuration or network problems. Check that the database connection string is correct and the database server is running.

func init() {
  db, err := gorm.Open("mysql", "user:password@tcp(localhost:3306)/database")
  if err != nil {
    panic(err)
  }

  // 检查数据库连接
  if err = db.DB().Ping(); err != nil {
    panic(err)
  }
}

5. Static files cannot be accessed

Static files cannot be accessed usually because the file path is incorrect or the file is not configured correctly. Check that the file path is correct and that the file has been added to the static files directory.

func main() {
  mux := http.NewServeMux()
  router := gin.New()

  // 注册静态文件
  router.Static("/static", "./static")

  mux.Handle("/", router)
  http.ListenAndServe(":8080", mux)
}

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