Layouts and content_for

Rails
1

when i studied the tutorial about layouts & content_for from railscast.I
need a clarification as per their tutorial.

url:#8 Layouts and content_for - RailsCasts

<!- projects/index.rhtml →
<% content_for :head do %> <= stylesheet_link_tag ‘projects’ %>
< end %>

<!- layouts/application.rhtml →

Todo List <%= stylesheet_link_tag ‘application’ %> <%= yield :head %>

As per the tutorial they are calling the yiel:head & content_for :head
has been written in index.html.erb.

My question is if i want to call another yield such as yield :footer and
if i write content_for :footer in some other file like footer.html.erb.
Then in my layout yield :footer is not taking.

Please give me some suggestions regarding this

Thanks in advance

2

You have to keep in mind how views are being called:

  • The browser makes a request to a URL
  • The Rails routing rules determine which controller/action the URL
    resolves to
  • The action is called
  • The corresponding view (assuming the action doesn’t redirect to a
    new action) is being called
  • The controller (usually) determines which layout is to be used
  • The view is displayed together with the layout.

So: if you have an index.html.erb view being displayed, together with
the layout application.html.erb, that’s all that will be displayed. If
your view doesn’t define content_for for all the parts listed in you
layout (with yield), those symbols remain undefined (nil) and don’t
display. Which is why your :footer part isn’t displayed, there is
nothing telling rails to display the footer.html.erb template.

If you want to render a footer partial, you can use <%=
render :partial => shared/footer %> for example. That will actually
include the shared/_footer.html.erb template in your page.

On 17 sep, 11:17, Lost W. [email protected]

3

deegee wrote:

You have to keep in mind how views are being called:

  • The browser makes a request to a URL
  • The Rails routing rules determine which controller/action the URL
    resolves to
  • The action is called
  • The corresponding view (assuming the action doesn’t redirect to a
    new action) is being called
  • The controller (usually) determines which layout is to be used
  • The view is displayed together with the layout.

So: if you have an index.html.erb view being displayed, together with
the layout application.html.erb, that’s all that will be displayed. If
your view doesn’t define content_for for all the parts listed in you
layout (with yield), those symbols remain undefined (nil) and don’t
display. Which is why your :footer part isn’t displayed, there is
nothing telling rails to display the footer.html.erb template.

If you want to render a footer partial, you can use <%=
render :partial => shared/footer %> for example. That will actually
include the shared/_footer.html.erb template in your page.

On 17 sep, 11:17, Lost W. [email protected]

Thanks for ur reply.
After made the post i just found the result.thanks for ur suggestion