删除特定rails .html.erb文件中的标头呈现

Question

I'm rendering a header universally across my application in layouts/application.html.erb.

I'd like to make the header not appear in a specific foo.html.erb file.

What's the syntax for un-rendering a universal layout?

EDIT:

The controller for the layout is a devise controller, specifically Sessions Controller.

Answer 1

in your controller you can set the layout to false (or another layout), if false then you need all of the html,head,body tags in your view file

class BarController < ApplicationController
  def foo
    render :layout => false # render foo.html.erb with no layout
  end 
end

see section 2.2.11.2 from the rails guides: http://guides.rubyonrails.org/layouts_and_rendering.html

EDIT: including devise layout overrides

in config/initializers/devise.rb

Devise::SessionsController.layout "bar"
Devise::RegistrationsController.layout "foo"
Devise::ConfirmationsController.layout false # never tried this, guessing it would work
Devise::UnlocksController.layout "bar"
Devise::PasswordsController.layout "foo"

also see the wiki post - https://github.com/plataformatec/devise/wiki/How-To:-Create-custom-layouts has at least one other way

Answer 2

Let's say the controller and action that renders the template foo.html.erb is 'things#foo' and the path to this action is things_path. You can wrap the header in conditional tags as follows

<% unless request.path == things_path %>
<% end %>

. There are several ways to achieve this, but here is one.