Trouble getting Ruby on Rails yield to work in the UI layer

I am following this tutorial http://guides.rubyonrails.org/layouts_and_rendering.html and trying to separate the header div from the rest of the HTML templates.

I have taken out a div from my app/views/home/index.html.erb file 开发者_开发问答and replaced it with

<%= yield :head %>

Then I made a file called head.html.erb in the /app/views/layouts directory and put that div in there. Then I put this code around the div:

<% content_for :head do %>
<% end %>

But it doesn't work and the header div does not get displayed. Where did I go wrong? I think there is a path and directory mismatch, but I am not sure exactly how to match them up.

Thank you!

Your layout is where you put the yield call, and each view's template is where you put the content_for block. You'll probably want your yield call in your application's main layout file.

So in app/views/layouts/application.html.erb put this where you want it to be:

<div id="my_header_div">
  <%= yield :head %>
</div>

Then in each view, you can do this:

<% content_for :head do %>
  <h1>My Header!</h1>
<% end %>

And it will insert inside the div in your layout file.

You should put this:

<%= yield :head %>

in your layout file

If your head layout is not layout for your particular action content_for :head will never work