golang beego build

Golang is a programming language that is popular in the field of web development. It is efficient, simple, and reliable, and is very suitable for developing web applications with high concurrency, scalability, and performance requirements. Beego is a very popular MVC framework in Golang. It is easy to get started and provides a large number of functions, making developing web applications easier and more efficient.

This article mainly introduces how to use Golang and Beego framework to build a web application.

1. Installing Golang and Beego

Before we begin, we need to install the Golang and Beego frameworks. Golang's official website can download the installation package from https://golang.org/ and install it accordingly according to your operating system. After the installation is complete, we also need to configure the GOPATH environment variable.

In Windows systems, configuring GOPATH can be completed by the following steps:

• Create a new folder, such as goproject, and use it as the root directory of GOPATH.
• Add %GOPATH% in Path.

In Linux and Mac systems, you can add the following command to the ~/.bash_profile file:

export GOPATH=$HOME/goproject
export PATH=$PATH :$GOPATH/bin

To install Beego, use the following command:

$ go get -u github.com/astaxie/beego
$ go get -u github.com/beego/ bee

2. Create a new Beego project

Creating a new Beego project is very simple, just run the following command:

$ bee new myproject

This command will create a Beego project named "myproject" and create the corresponding directory in the src directory of GOPATH. Next, we need to switch to the directory and run the following command to start the application:

$ cd myproject
$ bee run

Then, open the URL http:// in the browser localhost:8080, you can see Beego’s welcome page. This means we have successfully created a new Beego application.

3. Writing Controllers and Views

Now, we can start writing our own controllers and views. In Beego, controllers are used to process input requests and generate output responses, and views are used to render output responses.

First, let's create a controller named "mycontroller" and add a method named "index":

package controllers

import (

"github.com/astaxie/beego"

)

type MyController struct {

beego.Controller

}

func (c *MyController) Get() {

c.Data["Name"] = "Beego"
c.TplName = "index.html"

}

Then, we create a view file named "index.html":

<title>Welcome to {{.Name}}!</title>

<h1 id="Welcome-to-Name">Welcome to {{.Name}}!</h1>

This view file uses Golang’s template language to render the output response and set the variable Name The value is set to Beego. Now we can run the application and view the page in the browser to see if it was successful. If everything goes well, we should be able to see a text titled "Welcome to Beego!" on the page.

4. Connecting to the database

Typically, web applications need to access a database to store data or retrieve data from the database. In Golang, we can use many different database drivers to connect to different types of databases. In this article, we will use the MySQL database as an example.

First, we need to install and configure the MySQL database. After the installation is complete, we need to add the following code to the code to connect to the database:

package main

import (

"github.com/astaxie/beego"
_ "github.com/go-sql-driver/mysql"

)

func init() {

// Set database information.
mysqluser := beego.AppConfig.String("mysqluser")
mysqlpass := beego.AppConfig.String("mysqlpass")
mysqlurls := beego.AppConfig.String("mysqlurls")
mysqlport := beego.AppConfig.String("mysqlport")
mysqldb := beego.AppConfig.String("mysqldb")

// Connect to MySQL database.
dsn := mysqluser + ":" + mysqlpass + "@tcp(" + mysqlurls + ":" + mysqlport + ")/" + mysqldb + "?charset=utf8"
orm.RegisterDataBase("default", "mysql", dsn)

}

This code snippet obtains the account and password information required to connect to MySQL from Beego's configuration file, and connects to the MySQL database when the application starts.

5. Create model

Now, we have successfully connected to the MySQL database. Next, we need to define the data model in order to retrieve and store data from the database. In Golang, we can use ORM (Object-Relational Mapping) libraries, such as GORM or XORM, to easily manage databases.

In this section, we will use the GORM library as an example. First, we need to install the GORM library:

$ go get -u github.com/jinzhu/gorm

Then, we can create a model named "mymodel" in the project, as follows Shown:

package models

import (

"github.com/jinzhu/gorm"

)

type MyModel struct {

gorm.Model
Name string

}

Then, we need to initialize the GORM database in the main function:

package main

import (

"github.com/astaxie/beego"
"github.com/astaxie/beego/orm"
_ "github.com/go-sql-driver/mysql"
"myproject/models"

)

func init() {

// Set database information.
mysqluser := beego.AppConfig.String("mysqluser")
mysqlpass := beego.AppConfig.String("mysqlpass")
mysqlurls := beego.AppConfig.String("mysqlurls")
mysqlport := beego.AppConfig.String("mysqlport")
mysqldb := beego.AppConfig.String("mysqldb")

// Connect to MySQL database.
dsn := mysqluser + ":" + mysqlpass + "@tcp(" + mysqlurls + ":" + mysqlport + ")/" + mysqldb + "?charset=utf8"
orm.RegisterDataBase("default", "mysql", dsn)

// Register ORM model.
orm.RegisterModel(new(models.MyModel))

}

Now, we have successfully created the model and connected to the database. We can query the model using the following code in the controller:

package controllers

import (

"github.com/astaxie/beego"
"myproject/models"

)

type MyController struct {

beego.Controller

}

func (c *MyController) Get() {

var mymodels []models.MyModel
orm.NewOrm().QueryTable("my_model").All(&mymodels)

c.Data["MyModels"] = mymodels
c.TplName = "index.html"

}

6. Summary

In this article, we introduced how to build web applications using the Golang and Beego frameworks. We learned how to create controllers and views, connect to databases, and create models. Although this article is just a simple example, it can be used as a starting point for getting started with Golang and Beego. If you want to further explore more features and usage of Golang and Beego, please check out the official documentation and sample code.

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