Rendering partials with layouts

Module ActionView::Partials

引用

Partials can have their own layouts applied to them. These layouts are different than the ones that are specified globally
for the entire action, but they work in a similar fashion. Imagine a list with two types of users:

   <!-- app/views/users/index.html.erb -->
   Here's the administrator:

   <%= render :partial => "user", :layout => "administrator", :locals => { :user => administrator } %>

   Here's the editor:

   <%= render :partial => "user", :layout => "editor", :locals => { :user => editor } %>

   <!-- app/views/users/_user.html.erb -->

   Name: <%= user.name %>

   <!-- app/views/users/_administrator.html.erb -->

   <div id="administrator">
     Budget: $<%= user.budget %>
     <%= yield %>
   </div>

   <!-- app/views/users/_editor.html.erb -->

   <div id="editor">
     Deadline: $<%= user.deadline %>
     <%= yield %>
   </div>

...this will return:

   Here's the administrator:

   <div id="administrator">
     Budget: $<%= user.budget %>
     Name: <%= user.name %>
   </div>

   Here's the editor:

   <div id="editor">
     Deadline: $<%= user.deadline %>
     Name: <%= user.name %>
   </div>

You can also apply a layout to a block within any template:

   <!-- app/views/users/_chief.html.erb -->

   <% render(:layout => "administrator", :locals => { :user => chief }) do %>
     Title: <%= chief.title %>
   <% end %>

...this will return:

   <div id="administrator">
     Budget: $<%= user.budget %>
     Title: <%= chief.name %>
   </div>