ROR_session_app_1

Description: This APP is a small sample, where a User can blog

Make a CRUD operations of USER

Run the Command

$ rails generate scaffold user name age:integer email

Make a CRUD operations of ARTICLE

Run the command

$ rails generate scaffold article title content:text user:references

Make the default route to user list and inherit the article routes in user routes

Change in config/routes.rb.

Un-comment line no. 8 and change it to:

  # resources :articles
  resources :users, shallow: true do
    resources :articles
  end

Change the routes in line 2,3 to

 root 'users#index'

Run Migrations to make tables in Db

 $ rake db:migrate

Make a join between User and Article in models

Add the below line to file "app/models/user.rb" before end

 	has_many :articles

Lets make a graphical design of the database

 	$ bundle exec erd
 	$ sudo apt-get install graphviz
 	$ rake diagram:all

Note: Check the file "erd.pdf" and folder "doc"

Lets start our Rails server

 	$ rails server

Add the below line to file "app/views/users/show.html.erb" after line no. 17

ERROR

 	</br>
	</br>
	</br>
	<%= link_to @user.name + ' articles', user_articles_path(@user) %>
	</br>
	</br>
	</br>

Change the line in file "app/views/articles/index.html.erb" at line no. 31 to

ERROR

 <%= link_to 'New Article', new_user_article_path %>

Change the code in function "NEW" in file "app/controllers/articles" to

ERROR

  @user = User.find(params[:user_id])
  @article = @user.articles.new

Change the line in file "app/views/articles/_form.html.erb" at line 1 to

ERROR

  <%= form_for([@user, @article]) do |f| %>

Change the line in file "app/views/articles/_form.html.erb" at line 22 to

Functionality: User ID is visible, lets hide it

  <div class="field" style="display:none">

Change the line in file "app/views/articles/new.html.erb" at line 5 to

ERROR

  <%= link_to 'Back', user_articles_path %>

Change the process of saving article with user. Add and modify code in file "app/controllers/

articles" at line 28 to ERROR

  @user = User.find(params[:user_id])
  @article = @user.articles.new(article_params)

Change the line in file "app/views/articles/show.html.erb" at line 19 and in file

ERROR "app/views/articles/edit.html.erb" at line 6 to

  <%= link_to 'Back', user_articles_path(user_id: @article.user.id) %>

Add line in file "app/views/articles/index.html.erb" at line 32

Functionality: Link in Article List which redirects to User List

  <%= link_to "All Users",  users_path %>

Now Time to move our build on production

  $ bundle install --without production
  $ git add .
  $ git commit -a -m "Update Gemfile.lock for Heroku"
  $ heroku create
  $ git push heroku master
  $ heroku run rake db:migrate
  $ heroku apps:rename paxcel-session-app