#contents
*Prerequisite [#q4efe545]
-Ubuntu Server (You can refer [[Overall/UbuntuServer]])
-RVM (You can refer [[Overall/RVM]])
*Install&Setup [#y05d363e]
:Step.1|
Check if the rails has already been installed.
$ rails --version
:Step.2|
If the rails has not been installed yet, execute the following command
$ gem install rails
*HowToUse [#p499ff68]
**Create new application [#n11fa587]
:Step.1|
Create new application.
$ rails new <Application Name>
:Step.2|
Launch application.
$ cd <Application Name>
$ rails server
In case you encounter the error message of "Could not find a JavaScript runtime.", execute the following commands.
$ gem install execjs
$ gem install therubyracer
Open the Gemfile and append the following lines.
$ vi Gemfile
gem ‘execjs’
gem ‘therubyracer’
$ bundle install
:Step.3|
Access the following page.
http://localhost:3000/
#ref(CreateApplication_fig1.png,,500x266,)
:Step.4|
Create controller and view files.
$ rails generate controller <Controller Name> <Method(View)> <Method(View)>
(Example)
$ rails generate controller Say hello goodbye
:Step.5|
Access the following page.
http://localhost:3000/say/hello/
#ref(CreateApplication_fig2.png,,500x266,)
**Get data from RESTful service [#t20ffe9e]
:Step.1|
Edit controller.
$ vi app/controller/<Controller file>
require 'open-uri'
require 'json'
res = open('<URL>')
code, message = res.status
if code == '200'
@result = JSON.parse(res.read)
end
:Step.2|
Put it to view file.
$ vi app/view/<View file>
<table>
<% @result.each do |data| %>
<tr>
<td><%= data['<Key#1>'] %></td>
<td><%= data['<Key#2>'] %></td>
</tr>
<% end %>
</table>
**Upload to Heroku [#hf6c5c2d]
:Step.1|Create new account in Heroku (https://id.heroku.com/login)
#ref(Heroku_fig1.png,,500x266,)
:Step.2|Install Ruby 2.2.2
$ rvm install ruby-2.2.2
:Step.3|Install Heroku Toolbelt.
$ wget -O- https://toolbelt.heroku.com/install-ubuntu.sh | sh
When you encounter error, you can use standalone edition with the following commands.
$ wget -qO- https://toolbelt.heroku.com/install.sh | bash
$ echo 'PATH="/usr/local/heroku/bin:$PATH"' >> ~/.profile
:Step.4|Login to Heroku
$ heroku login
:Step.5| Prepare Git repository.
$ git clone <Git Repository>
or
$ cd <Ruby On Rails Project>
$ git init
$ git add .
$ git commit -m "initial commit"
:Step.6| Edit Gemfile because Heroku doesn't allow sqlite3, but PostgreSQL
$ vi config/Gemfile
+gem 'pg'
-gem 'sqlite3'
+gem 'sqlite3', group: %w(test development), require: false
+gem 'pg', group: %w(production), require: false
:Step.7|Install gem file.
$ bundle install
:Step.8|Edit database.yml
$ vi db/database.yml
production:
<<: *default
- database: db/production.sqlite3
+ adapter: pg
+ database: db/production.pg
:Step.9|Create application in Heroku
$ heroku create <application name>
:Step.10|Push files.
$ git push heroku master
*Author [#la69134c]
S.Yatsuzuka