How to include a css or javascript in an erb that is outside the layout?

If you have a generic edit.css file, I would suggest an if in your layout

<%= stylesheet_link_tag 'edit' if params[:action] == 'edit' %>

Otherwise you can use content_for with a yield to add additional tags into the head.

layout.html.erb

<head>  ...  <%= yield(:header) if @content_for_header %></head>

products/edit.html.erb

<% content_for :header do -%>  <%= stylesheet_link_tag 'edit_product' %><% end -%>

ruby-on-rails view erb

You can add a stylesheet tag inside the head tag of the layout by doing something like this:

layouts/products.html.erb:

    <head>        ...        <%= yield :css %>        ...    </head>

products/edit.html.erb

<% content_for :css do    stylesheet_link_tag 'products_edit'end %>

ruby-on-rails view erb

You can't if your </head> tag is in your layout.

You may want a different layout for that controller action. Like this on the render:

 render :action => "index", :layout => "some_other_layout

Also you can set a different default layout for a whole controller with this line in the controller class:

layout "some_other_layout"

Check the API docs, there's some complex things you can do with conditionals on that layout method.

CodeHunter