how to render partial on everything except a certain action

Question

I have a _header.html.erb partial which is where I put my navbar

on my launch page I don\'t want to display the navbar.

this is the body of appl

Answer 1

You can put that logic in your stylesheets, in your controller or in your views (this last one, only for whole controllers).

Stylesheets

If you want to add the logic in your stylesheets, first add to your body tag the following classes:

">

Then, in your css, add something like this:

body.controller.action .navbar {
  display: none;
}

Controller

To add this logic to your controller, add a before filter to your application controller:

class ApplicationController < ActionController::Base
  before_filter :show_navbar

  protected
  def show_navbar
    @show_navbar = true
  end
end

Then, if you don't want to show the navbar in CarsController, do this:

class CarsController < ApplicationController
  skip_before_filter :show_navbar, only: [list, of, actions]
end

where [list, of, actions] are the actions you don't want to show the navbar in.

Finally, change you layout to look like this:

<% if @show_navbar -%>
  <%= render 'layouts/header' %>
<% end -%

Views

If you want to disable the header for whole controllers, first, move the header to app/views/application/ and change your render to:

<%= render partial: 'header' %>

Finally, in those controllers without navbar, add an empty _header.html.erb to app/views/controller_name.

For this option to work, you need at least Rails 3.1