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Ruby on Rails 7 : Install2023/07/14

 
Install Ruby on Rails 6 to build Ruby Framework environment.
[1]
[2] Install some other required packages.
root@dlp:~#
apt -y install ruby-dev libmariadb-dev yarnpkg
[3] Install Rails 7.
root@dlp:~#
gem install bundler

root@dlp:~#
gem install nokogiri -- --use-system-libraries

root@dlp:~#
gem install rails --version="~>7.0"

root@dlp:~#
rails -v

Rails 7.0.6
[4] Create a sample application and make sure it works normally.
Install MariaDB Server for this sample app, refer to here.
root@dlp:~#
gem install mysql2 -- --with-mysql-config=/usr/bin/mysql_config

root@dlp:~#
rails new SampleApp -d mysql

root@dlp:~#
cd SampleApp

root@dlp:~/SampleApp#
vi config/database.yml
default: &default
  adapter: mysql2
  encoding: utf8mb4
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  username: root       # MariaDB connection user
  password: password   # MariaDB connection password
  host: localhost

root@dlp:~/SampleApp#
vi config/application.rb
module SampleApp
  class Application < Rails::Application
    # Initialize configuration defaults for originally generated Rails version.
    config.load_defaults 7.0
    # line 13 : specify hosts
    # if not specified, users can access to only [localhost] and IP address
    # if allow all sub-domain, specify domain name like follows
    config.hosts << ".srv.world" 

# create sample application

root@dlp:~/SampleApp#
rails db:create

Created database 'SampleApp_development'
Created database 'SampleApp_test'
root@dlp:~/SampleApp#
rails generate scaffold testapp name:string title:string body:text

root@dlp:~/SampleApp#
rails db:migrate

== 20230714020424 CreateTestapps: migrating ===================================
-- create_table(:testapps)
   -> 0.0121s
== 20230714020424 CreateTestapps: migrated (0.0123s) ==========================

root@dlp:~/SampleApp#
rails server --binding=0.0.0.0

=> Booting Puma
=> Rails 7.0.6 application starting in development
=> Run `bin/rails server --help` for more startup options
Puma starting in single mode...
* Puma version: 5.6.6 (ruby 3.1.2-p20) ("Birdie's Version")
*  Min threads: 5
*  Max threads: 5
*  Environment: development
*          PID: 25439
* Listening on http://0.0.0.0:3000
Use Ctrl-C to stop
[5] Access to the [http://(server's hostname or IP address):3000/] from a client computer. It's OK if following site is displayed normally.
  Access to [http://(server's hostname or IP address):3000/testapps/], then it's possible to use sample app like follows.
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