Golang learning Web application development based on Ruby on Rails

In recent years, Go language (Golang) has become popular in the field of web application development. This article will introduce how to use Go language to develop web applications in a Ruby on Rails environment.

Introduction to Ruby on Rails

Ruby on Rails, or Rails for short, is a Web application development framework based on the Ruby language. It adopts the concept of Convention over Configuration so that developers can focus more on the business logic of the application rather than excessive configuration issues. Rails supports the MVC (Model-View-Controller) architecture, where Model represents the data model, View represents the user interface, and Controller is responsible for scheduling the interaction between business logic and user interface.

Advantages of Golang in Web Application Development

The Go language is a compiled, concurrent, and garbage-collected programming language. It has concise syntax, high readability, efficient memory management and coroutine support. It is also a development language launched by Google. In web application development, Go language has the following advantages:

1. Efficiency: Go language improves program execution efficiency by compiling it into machine code, and its concise syntax can also effectively reduce Reduce the amount of code and improve development efficiency.
2. Concurrency: Go language inherently supports coroutines and concurrent programming, making it easy to write highly concurrent web applications.
3. Cross-platform: Go language can also be compiled into binary files for different platforms, making it easy to run on different operating systems and convenient for developers to publish projects.
4. Object-oriented: Although the Go language is not a purely object-oriented language, it still has object-oriented characteristics, which facilitates developers to perform modular programming.

Golang combined with Ruby on Rails

There are many frameworks available for developing web applications using Go language, such as Gin, Echo and Beego. Here, we have chosen to use the Gin framework for application development and combine it with Ruby on Rails.

Before starting, you need to install the Go language development environment on your local machine and install the Gin framework. The command is as follows:

$ go get -u github.com/gin-gonic/gin

After the installation is complete, we can embed Go language code in the Ruby on Rails application.

Embed Golang code in a Ruby on Rails application

Let’s take a look at a simple example to demonstrate how to embed Go language code in a Ruby on Rails application code.

1. Create Go language module for Ruby on Rails application

First, we need to create a go folder in the lib directory of the Ruby on Rails application and place it in Create our Go language module in this folder. For example, the following sample application:

package main

import (
    "fmt"

    "github.com/gin-gonic/gin"
)

func main() {
    fmt.Println("Hello, world!")

    router := gin.Default()

    router.GET("/", func(c *gin.Context) {
        c.JSON(200, gin.H{
            "message": "Hello, world!",
        })
    })

    router.Run(":8080")
}

This sample application uses the Gin framework and creates a default HTTP server. When the server receives a root URL request, it returns a simple JSON response.

2. Loading Go language module in Ruby on Rails application

In our Ruby on Rails application, we need to use Ruby to call the Go language module so that Go language code is used in conjunction with our Rails code.

The following is an example of a simple Ruby on Rails controller that calls the Go language module defined above:

class GolangController < ApplicationController
  def index
    # 运行Go语言模块
    output = `go run #{Rails.root.join('lib/go/main.go')}`
    render plain: output
  end
end

This controller will use the `` operator to run in Ruby external command, passing the path to our Go language module as an argument.

3. Run the Ruby on Rails application and view the output

Now we can access our controls by typing http://localhost:3000/golang/index in the browser compiler and view the output of the Go language module.

When we open the URL in the browser, the controller will run the Go language module and pass the output to the browser. In this example application, we will see the JSON string returned by the Go language module.

Conclusion

This article introduces how to use Go language to develop web applications in a Ruby on Rails environment. Although Golang has many advantages in the field of web applications, it is not a panacea solution. For different application scenarios, we need to weigh the advantages and disadvantages of Golang and other languages ​​according to the specific situation, so as to choose the most suitable development language.

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