proyecto_1

By: Edwin Montoya - csanch35@eafit.edu.co

DEVELOPMENT::

1. Creating the Metadata Application

    user1@dev$ rails new proyecto_1

2. Starting up the WebApp Server

    user1@dev$ rails s

Open browser: http://localhost:3000

3. Main page: "Hello World"

    user1@dev$ rails generate controller Welcome index

    edit:
    app/views/welcome/index.html.erb
    config/routes.rb

4. Create REST routes

edit: config/routes.rb # scope '/' -> run http://server:3000 (native) or http://server (inverse proxy or passenger) # scope '/prefix_url' -> run http://server:3000/prefix_url or http://server/prefix_url (inverse proxy or passenger). # ej: http://10.131.137.183/proyecto_1 Rails.application.routes.draw do scope '/' do get 'static_pages/index' resources :articles root 'static_pages#home' end end
run:
user1@dev$ rails routes
output:
```
Prefix Verb   URI Pattern                    Controller#Action
    root GET    /                              static_pages#home
```
session_new GET /session/new(.:format) session#new help GET /help(.:format) static_pages#help about GET /about(.:format) static_pages#about contact GET /contact(.:format) static_pages#contact login GET /login(.:format) session#new POST /login(.:format) session#create logout DELETE /logout(.:format) session#destroy following_user GET /users/:id/following(.:format) users#following followers_user GET /users/:id/followers(.:format) users#followers users GET /users(.:format) users#index POST /users(.:format) users#create new_user GET /users/new(.:format) users#new edit_user GET /users/:id/edit(.:format) users#edit user GET /users/:id(.:format) users#show PATCH /users/:id(.:format) users#update PUT /users/:id(.:format) users#update DELETE /users/:id(.:format) users#destroy microposts POST /microposts(.:format) microposts#create micropost DELETE /microposts/:id(.:format) microposts#destroy relationships POST /relationships(.:format) relationships#create relationship DELETE /relationships/:id(.:format) relationships#destroy

5. Generate controller for 'micropost' REST Services

    user1@dev$ rails generate controller Microposts

modify: app/controllers/micropots_controller.rb
create: app/views/micropost/new.html.erb
run: http://localhost:3000/microposts/new

6. Create a FORM HTML to enter data for an micropost

edit: app/views/microposts/new.html.erb:

<%= form_for(@micropost) do |f| %> <%= render 'shared/error_messages', object: f.object %>
<%= f.text_field :name, placeholder: "Name" %> <%= f.text_field :ext, placeholder: "Extension" %> <%= f.text_field :size, placeholder: "Size" %>
<%= f.submit "Post", class: "btn btn-primary" %>
```
  <span class="picture">
  <%= f.file_field :picture, accept: 'image/jpeg,image/gif,image/png' %>
  </span>
```
<% end %>

modify: app/views/micropost/new.html.erb:

<%= form_for :micropost, url: ausers_path do |f| %>

POST method and require 'create' action.

add 'create' action to MicropostController:

  class MicropostController < ApplicationController
    def new
    end

    def create
      @micropost = current_user.microposts.build(micropost_params)
    end
  end

7. Creating the Micropost model

  user1@dev$ rails generate model Micropost name:string ext:string size:integer picture:string

look db/migrate/YYYYMMDDHHMMSS_create_micropost.rb:

class CreateMicroposts < ActiveRecord::Migration[5.1]
  def change
      create_table :microposts do |t|
        t.text :name
        t.string :ext
        t.integer :size
        t.integer :user_id

        t.timestamps
      end
    end
end

8. Running a Migration

run:

user1@dev$ rails db:migrate

include postgresql in test and production environment:

(Warning: install postgresql server on host)

Modify Gemfile

# Use Postgresql as the database for Active Record
gem 'pg'

Modify config/database.yml: default: &default adapter: mysql2 username: root password: *******, pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %> timeout: 5000

test:
    <<: *default
    database: mydatabase

production:
    adapter: mysql2
    username: b7b0e8356a0f9d
    password: a10df7f0
    pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
    timeout: 5000
    database: heroku_80ca0843bce279a
    host: mysql://b7b0e8356a0f9d:a10df7f0@us-cdbr-iron-east-05.cleardb.net/heroku_80ca0843bce279a?reconnect=true

Drop, Create and migrate new database:

    user1@dev$ rake db:drop db:create db:migrate

9. Saving data in the controller

Open app/controllers/microposts_controller.rb

def create
  @micropost = current_user.microposts.build(micropost_params)
  if @micropost.save
    flash[:success] = "Micropost created!"
    redirect_to root_url
  else
    @feed_items = []
    render 'static_pages/home'
  end
end

private

  # Never trust parameters from the scary internet, only allow the white list through.
  def micropost_params
    params.require(:micropost).permit(:name, :ext, :size, :picture)
  end

fix1:

@@micropost = current_user.microposts.build(micropost_params)

fix2:

def create
  @micropost = current_user.microposts.build(micropost_params)
  if @micropost.save
    flash[:success] = "Micropost created!"
    redirect_to root_url
  else
    @feed_items = []
    render 'static_pages/home'
  end
end

private

  # Never trust parameters from the scary internet, only allow the white list through.
  def micropost_params
    params.require(:micropost).permit(:name, :ext, :size, :picture)
  end

10. Showing Micropost

Route:

user GET    /users/:id(.:format)           users#show

Controller: add action in app/controllers/users_controller.rb

def show
  @user = User.find(params[:id])
  @microposts = @user.microposts.paginate(page: params[:page])
end

View: create a new file app/views/users/show.html.erb

<li id="micropost-<%= micropost.id %>">
    <%= link_to gravatar_for(micropost.user), micropost.user %>
    <span class="user"><%= link_to micropost.user.name, micropost.user %></span>
    <span class="content">
      <%= micropost.name %>
      <%= image_tag micropost.picture.url if micropost.picture? %>
    </span>
    <span class="content"><%= micropost.ext %></span>
    <span class="content"><%= micropost.size %></span>
    <span class="timestamp">
      Posted <%= time_ago_in_words(micropost.created_at) %> ago.
      <% if current_user?(micropost.user) %>
        <%= link_to "delete", micropost, method: :delete,
                                         data: { confirm: "You sure?" } %>
      <% end %>
    </span>
  </li>

11. Listing all microposts

Route:

user GET    /users(.:format)          users#show

Controller: add action in app/controllers/users_controller.rb

def show
  @user = User.find(params[:id])
  @microposts = @user.microposts.paginate(page: params[:page])
end

View: create a new file app/views/users/index.html.erb

<li id="micropost-<%= micropost.id %>">
    <%= link_to gravatar_for(micropost.user), micropost.user %>
    <span class="user"><%= link_to micropost.user.name, micropost.user %></span>
    <span class="content">
      <%= micropost.name %>
      <%= image_tag micropost.picture.url if micropost.picture? %>
    </span>
    <span class="content"><%= micropost.ext %></span>
    <span class="content"><%= micropost.size %></span>
    <span class="timestamp">
      Posted <%= time_ago_in_words(micropost.created_at) %> ago.
      <% if current_user?(micropost.user) %>
        <%= link_to "delete", micropost, method: :delete,
                                         data: { confirm: "You sure?" } %>
      <% end %>
    </span>
</li>

12. Adding links

View: Open app/views/shared/_user_info.html.erb

<span><%= link_to "view my profile", current_user %></span>

13. Updating Articles

Route:

article GET    /articles/:id(.:format)      articles#show

Controller: edit action to the ArticlesController -> app/controllers/articles_controller.rb
```
def edit
@article = Article.find(params[:id])
end
```

View: new page: app/views/articles/edit.html.erb

<h1>Edit article</h1>

<%= form_for(@article) do |f| %>

  <% if @article.errors.any? %>
    <div id="error_explanation">
      <h2>
        <%= pluralize(@article.errors.count, "error") %> prohibited
        this article from being saved:
      </h2>
      <ul>
        <% @article.errors.full_messages.each do |msg| %>
          <li><%= msg %></li>
        <% end %>
      </ul>
    </div>
  <% end %>

  <p>
    <%= f.label :title %><br>
    <%= f.text_field :title %>
  </p>

  <p>
    <%= f.label :text %><br>
    <%= f.text_area :text %>
  </p>

  <p>
    <%= f.submit %>
  </p>

<% end %>

<%= link_to 'Back', articles_path %>

Controller: update action in app/controllers/articles_controller.rb

def update
  @article = Article.find(params[:id])

  if @article.update(article_params)
    redirect_to @article
  else
    render 'edit'
  end
end

View: add link 'edit' in app/views/articles/index.html.erb

<table>
  <tr>
    <th>Title</th>
    <th>Text</th>
    <th colspan="2"></th>
  </tr>

  <% @articles.each do |article| %>
    <tr>
      <td><%= article.title %></td>
      <td><%= article.text %></td>
      <td><%= link_to 'Show', article_path(article) %></td>
      <td><%= link_to 'Edit', edit_article_path(article) %></td>
    </tr>
  <% end %>
</table>

View: add link 'edit' in app/views/articles/show.html.erb:

...
<%= link_to 'Edit', edit_article_path(@article) %> |
<%= link_to 'Back', articles_path %>

14. delete an Microposts

Route:

  micropost DELETE /microposts/:id(.:format)      microposts#destroy

Controller: app/controllers/microposts_controller.rb

  def destroy
    @@micropost.destroy
    flash[:success] = "Micropost deleted"
    redirect_to request.referrer || root_url
  end

View: add 'delete' link to app/views/microposts/index.html.erb

  ...
  < <span class="timestamp">
	    Posted <%= time_ago_in_words(micropost.created_at) %> ago.
	    <% if current_user?(micropost.user) %>
	      <%= link_to "delete", micropost, method: :delete,
	                                       data: { confirm: "You sure?" } %>
	    <% end %>
	</span>
  ...

DEPLOYMENT ON DCA FOR TESTING

1. Deploy the Micropost Web App on Linux Centos 7.x (test)

Install ruby and rails

references:

https://www.digitalocean.com/community/tutorials/how-to-use-postgresql-with-your-ruby-on-rails-application-on-centos-7

Connect remote server: (user1 is a sudo user)

local$ ssh user1@10.131.137.183
Password: *****

user1@test$

verify and install rvm, ruby, rails, postgres and nginx

install rvm (https://rvm.io/rvm/install)

  user1@test$ gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB

  user1@test$ \curl -sSL https://get.rvm.io | bash

reopen terminal app:

  user1@test$ exit

  local$ ssh user1@10.131.137.183
  Password: *****

install ruby 2.4.1

  user1@test$ rvm list known
  user1@test$ rvm install 2.4.1

install rails
```
  user1@test$ gem install rails
```

install myslql:

	user1@test$ mysql57-community-release-fc24-8.noarch.rpm

	user1@test$ sudo dnf config-manager --enable mysql57-community
	Password: *****

	user1@test$ sudo dnf repolist enabled | grep "mysql.*-community.*"
	user1@test$ sudo dnf config-manager --disablerepo mysql56-community-source
	user1@test$ sudo dnf config-manager --disablerepo mysql56-community
	user1@test$ sudo dnf -y update

	user1@test$ sudo dnf -y install mysql-community-server

    user1@test$ sudo yum install -y mysql-devel

run postgres:

  user1@test$ sudo systemctl start mysqld
  user1@test$ sudo systemctl enable mysqld

  user1@test$ mysql_secure_installation

Setup RAILS_ENV and PORT (3000 for dev, 4000 for testing or 5000 for production)

    user1@test$ export RAILS_ENV=test
    user1@test$ export PORT=4000

open PORT on firewalld service:

    user1@test$ sudo firewall-cmd --zone=public --add-port=4000/tcp --permanent
    user1@test$ sudo firewall-cmd --reload

clone de git repo, install and run:

    user1@test$ mkdir apps
    user1@test$ cd apps
    user1@test$ git clone https://github.com/csanch35/proyecto_1
    user1@test$ cd proyecto_1
    user1@test$ bundle install
    user1@test$ rake db:drop db:create db:migrate
    user1@test$ export RAILS_ENV=test
    user1@test$ export PORT=4000
    user1@test$ rails server

SETUP Centos 7.1 in production With Apache Web Server and Passenger.

Install Apache Web Server

  user1@prod$ sudo yum install httpd
  user1@prod$ sudo systemctl enable httpd
  user1@prod$ sudo systemctl start httpd

  test in a browser: http://10.131.137.183

Install YARN (https://yarnpkg.com/en/docs/install) (for rake assets:precompile):
Install module Passenger for Rails in HTTPD (https://www.phusionpassenger.com/library/install/apache/install/oss/el7/):
```
  user1@prod$ gem install passenger

  user1@prod$ passenger-install-apache2-module
```

when finish the install module, add to /etc/http/conf/httpd.conf:

    LoadModule passenger_module /home/user1/.rvm/gems/ruby-2.4.1/gems/passenger-5.1.6/buildout/apache2/mod_passenger.so
    <IfModule mod_passenger.c>
      PassengerRoot /home/user1/.rvm/gems/ruby-2.4.1/gems/passenger-5.1.6
      PassengerDefaultRuby /home/user1/.rvm/gems/ruby-2.4.1/wrappers/ruby
    </IfModule>

Configure the ruby rails app to use passenger (https://www.phusionpassenger.com/library/walkthroughs/deploy/ruby/ownserver/apache/oss/el7/deploy_app.html):

summary:

  - clone the repo to /var/www/myapp/proyecto_1

  user1@prod$ cd /var/www/myapp/proyecto_1

  user1@prod$ bundle install --deployment --without development test

  - Configure database.yml and secrets.yml:

  user1@prod$ bundle exec rake secret
  user1@prod$ vim config/secrets.yml

  production:
    secret_key_base: the value that you copied from 'rake secret'

  user1@prod$ bundle exec rake assets:precompile db:migrate RAILS_ENV=production

add microposts.conf to /etc/httpd/conf.d/myapp.conf:

  <VirtualHost *:80>
      ServerName 10.131.137.183

      # Tell Apache and Passenger where your app's 'public' directory is
      DocumentRoot /var/www/myapp/proyecto_1/public

      PassengerRuby /home/user1/.rvm/gems/ruby-2.4.1/wrappers/ruby

      # Relax Apache security settings
      <Directory /var/www/myapp/proyecto_1/public>
          Allow from all
          Options -MultiViews
          # Uncomment this if you're on Apache >= 2.4:
          #Require all granted
      </Directory>
  </VirtualHost>

restart httpd

  user1@prod$ sudo systemctl restart httpd

  test: http://10.131.137.183

SETUP Centos 7.1 in production With NGINX with inverse proxy

Install nginx

  user1@prod$ sudo yum install nginx
  user1@prod$ sudo systemctl enable nginx
  user1@prod$ sudo systemctl start nginx

  test in a browser: http://10.131.137.183

Rails app is running on 3000 port

  user1@prod$ cd proyecto_1
  user1@prod$ export RAILS_ENV=test
  user1@prod$ export PORT=3000
  user1@prod$ rails server
  => Booting Puma
  => Rails 5.1.2 application starting in test on http://0.0.0.0:3000
  => Run `rails server -h` for more startup options
  Puma starting in single mode...
  * Version 3.9.1 (ruby 2.4.1-p111), codename: Private Caller
  * Min threads: 5, max threads: 5
  * Environment: test
  * Listening on tcp://0.0.0.0:3000
  Use Ctrl-C to stop

Warning: this app must as a service on Centos.

Configure /etc/nginx/nginx.conf for Inverse Proxy

App from browser: http://10.131.137.236/proyecto_1

// /etc/nginx/nginx.conf

location /proyecto_1/ {
  proxy_set_header X-Real-IP $remote_addr;
  proxy_set_header HOST $http_host;
  proxy_set_header X-NginX-Proxy true;
  proxy_pass http://127.0.0.1:3000;
  proxy_redirect off;
}

MODIFY THE APPLICATION IN ORDER TO CONFIGURE THE NEW URI ('/proyecto_1'):

// modify config/routes.rb
# scope '/' -> run http://server:3000 (native) or http://server (inverse proxy or passenger)
# scope '/prefix_url' -> run http://server:3000/prefix_url or http://server/prefix_url (inverse proxy or passenger).
# ej: http://10.131.137.183/proyecto_1
Rails.application.routes.draw do
  scope '/proyecto_1' do
    get 'users/index'
    resources :users
    root 'home#index'
  end
end

Show new routes and controllers:
```
user1@prod$ rails routes

      Prefix Verb   URI Pattern                    Controller#Action
        root GET    /                              static_pages#home
 session_new GET    /session/new(.:format)         session#new
        help GET    /help(.:format)                static_pages#help
       about GET    /about(.:format)               static_pages#about
     contact GET    /contact(.:format)             static_pages#contact
       login GET    /login(.:format)               session#new
             POST   /login(.:format)               session#create
      logout DELETE /logout(.:format)              session#destroy
```
following_user GET /users/:id/following(.:format) users#following followers_user GET /users/:id/followers(.:format) users#followers users GET /users(.:format) users#index POST /users(.:format) users#create new_user GET /users/new(.:format) users#new edit_user GET /users/:id/edit(.:format) users#edit user GET /users/:id(.:format) users#show PATCH /users/:id(.:format) users#update PUT /users/:id(.:format) users#update DELETE /users/:id(.:format) users#destroy microposts POST /microposts(.:format) microposts#create micropost DELETE /microposts/:id(.:format) microposts#destroy relationships POST /relationships(.:format) relationships#create relationship DELETE /relationships/:id(.:format) relationships#destroy

Machinarius/proyecto_1

proyecto_1

By: Edwin Montoya - csanch35@eafit.edu.co

DEVELOPMENT::

1. Creating the Metadata Application

2. Starting up the WebApp Server

3. Main page: "Hello World"

4. Create REST routes

5. Generate controller for 'micropost' REST Services

6. Create a FORM HTML to enter data for an micropost

7. Creating the Micropost model

8. Running a Migration

include postgresql in test and production environment:

9. Saving data in the controller

10. Showing Micropost

11. Listing all microposts

12. Adding links

13. Updating Articles

14. delete an Microposts

DEPLOYMENT ON DCA FOR TESTING

1. Deploy the Micropost Web App on Linux Centos 7.x (test)

Install ruby and rails

install myslql:

Setup RAILS_ENV and PORT (3000 for dev, 4000 for testing or 5000 for production)

open PORT on firewalld service:

clone de git repo, install and run:

SETUP Centos 7.1 in production With Apache Web Server and Passenger.

SETUP Centos 7.1 in production With NGINX with inverse proxy