Help to understand scaffold's code!

rubyonrails-talk
1

Follwed a Guide at http://guides.rubyonrails.org/getting_started.html.Generated a scafffold as

   rails generate scaffold Post name:string title:string content:text                                      The content of app/view/posts/ index.html.erb file are as under

<h1>Listing posts</h1>

<table>   <tr>     <th>Name</th>     <th>Title</th>     <th>Content</th>     <th></th>     <th></th>     <th></th>   </tr>

<% @posts.each do |post| %>   <tr>     <td><%= post.name %></td>     <td><%= post.title %></td>     <td><%= post.content %></td>     <td><%= link_to 'Show', post %></td>     <td><%= link_to 'Edit', edit_post_path(post) %></td>     <td><%= link_to 'Destroy', post, :confirm => 'Are you sure?', :method => :delete %></td>   </tr> <% end %> </table>

<br />

<%= link_to 'New Post', new_post_path%>

                           Now look at following line of code,and please help me to understand it 1) <% @posts.each do |post| %> is it will execute when at least one post will be created??)

2) <td><%= post.name %></td>     <td><%= post.title %></td>     <td><%= post.content %></td>

(is it will get a values from database?)

Thanks

2

Look at the code on posts_controller.rb index method

3

See in app/controller/post_controller.rb file in that there is a code for index in def index . . . end

when you make any request above function will call first and then goes to index.html.erb file. Now you can explore more things by tracing the code.