Add edit , update , show and inex listing

app/controllers/articles_controller.rb

@@ -1,8 +1,26 @@
 class ArticlesController < ApplicationController
+  def index
+    @articles = Article.all
+  end
+
   def new
     @article = Article.new
   end
 
+  def edit
+    @article = Article.find(params[:id])
+  end
+
+  def update
+    @article = Article.find(params[:id])
+    if @article.update(article_params)
+      flash[:notice] = "Article was successfully updated"
+      redirect_to article_path(@article)
+    else
+      render 'edit'
+    end
+  end
+
   def create
     @article = Article.new(article_params)
     if @article.save

app/views/articles/edit.html.erb

@@ -0,0 +1,25 @@
+<h2>Edit existing article</h2>
+<% if @article.errors.any? %>
+<h3>The following errors prevented the article from getting edited</h3>
+<ul>
+ <% @article.errors.full_messages.each do |msg| %>
+  <li><%= msg %></li>
+ <% end %>
+</ul>
+<% end %>
+
+<%= form_for @article do |f| %>
+  <p>
+    <%= f.label :title %>
+    <%= f.text_field :title%>
+  </p>
+
+  <p>
+    <%= f.label :description %></br>
+    <%= f.text_area :description %>
+  </p>
+  <%= f.submit %>
+
+
+<% end %>
+<%= link_to 'Back to articles' , articles_path %>

app/views/articles/index.html.erb

@@ -0,0 +1,19 @@
+<h1> All Articles </h1>
+<%= link_to "Create new article" , new_article_path %>
+
+<style>table{border:1px solid #ccc;padding:15px;}tr{}</style>
+<table border="1">
+  <tr>
+    <th>Title</th>
+    <th>Description</th>
+  </tr>
+
+  <% @articles.each do |article| %>
+  <tr>
+    <td><%= article.title %></td>
+    <td><%= article.description %></td>
+    <td><%= link_to 'Edit', edit_article_path(article) %></td>
+    <td><%= link_to 'Show', article_path(article) %></td>
+  </tr>
+  <% end %>
+</table>

app/views/articles/new.html.erb

@@ -13,11 +13,13 @@
     <%= f.text_field :title%>
   </p>
 
-<p>
-  <%= f.label :description %></br>
-  <%= f.text_area :description %>
-</p>
-<%= f.submit %>
+  <p>
+    <%= f.label :description %></br>
+    <%= f.text_area :description %>
+  </p>
+  <%= f.submit %>
 
 
-<% end %>
+<% end %>
+
+<%= link_to 'Back to articles' , articles_path %>

app/views/articles/show.html.erb

@@ -3,4 +3,6 @@
   Title: <%= @article.title %>
 </p>
 
-<p>Description:<%= @article.description %></p>
+<p>Description:<%= @article.description %></p>
+<%= link_to 'Edit' , edit_article_path(@article) %> | 
+<%= link_to 'Back to articles' , articles_path %>