‘cycle’ css-related feature of Rails

If you want to display the list ( of users ) with different css-class for alternate record, there is no need to check the odd-even records,

For this, Rails have awesome feature and that is – ‘cycle’

We can use this as,

say we have 2 css classes-blank and white. If want to apply ‘black’ and ‘white’ class for alternate user record, then we have to write the code as,

<% @users.each do |user| %>
<li class="<%= cycle('black', 'white') -%>">
<%= user.name %></li>
<% end %>

Cool feature

Creating Sub Controllers in RubyOnRails

Previously I was adding most of the code in one controller…say if there is admin module, and there are different sections in it, then it’s better to add the code in separate controllers – sub-controllers.

Here is the way to create sub-controllers,

ruby script/generate controller admin/users

It will create users_controller.rb in /controllers/admin folder (sub-folder for controller)

Your user controller will look like,

class Admin::UsersController < ApplicationController
end

And to inherit the properties of the parent controller (AdminController), you can change parent controller as AdminController instead ApplicationController

class Admin::UsersController < AdminController
end


Hope this helps.