How to build a backend in golang

Go language has become very popular as a development language, so many people want to use it to build their own backend systems. This article will teach you how to use Go language to build a simple backend system.

First, we need to prepare some tools and environment. In this tutorial, the Go language and Beego framework will be used. Make sure you have installed the Go language environment and Beego framework. If not, you can go to the official website to download and install it.

Next, we need to create an empty project folder and use the commands provided by Beego to create a basic project structure.

$ bee new myproject

In this structure, we will see some basic directories, such as controllers, models and views. These directories will store controller, model and view files respectively.

Next, we need to create a background management controller. Create a controller using the following command:

$ bee generate controller admin

Here we have created a controller named "admin". Open the controllers/admin.go file and add the following code:

package controllers

import (
    "github.com/astaxie/beego"
)

type AdminController struct {
    beego.Controller
}

func (c *AdminController) Get() {
    c.TplName = "admin/index.tpl"
}

In this controller, we created a structure named "AdminController" and added a Get method. The Get method will jump to our admin/index.tpl file.

Now we need to create a view file. Create an index.tpl file in the views/admin directory and add the following code:

{{ .Title }}

<h1>Hello, admin!</h1>

In this file, we added a title and a simple text message.

Finally, we need to add a route and specify it to use the controller we just created. Add the following code to the routers/router.go file:

package routers

import (
    "github.com/astaxie/beego"
    "myproject/controllers"
)

func init() {
    beego.Router("/admin", &controllers.AdminController{})
}

This route will automatically use the controller we just created for rendering when accessing http://localhost:8080/admin.

Now we have completed a simple backend system. You can test it by visiting http://localhost:8080/admin in your browser.

In addition to the above functions, we can also use the ORM function provided by Beego to facilitate our interaction with the database. Create a user.go file in the models directory and add the following code:

package models

type User struct {
    Id   int
    Name string
}

func FindAllUsers() []*User {
    orm := beego.AppConfig.String("orm")
    if orm == "mysql" {
        // MySQL Query
    } else {
        // SQLite Query
    }
    return nil
}

In this file, we created a structure named "User" and added a structure named "FindAllUsers" function, this function can obtain all users from the database.

The above are the basic steps for building a simple backend using Go language and Beego framework. We can use these foundations to build more complex systems.

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