content_for documentation discrepancy

rubyonrails-core
1

<%= content_for :footer %> is mentioned in the docs (capture_helper.rb: 121), but is not valid at this point. I provided a simple patch below, but there should probably be some discussion.

http://dev.rubyonrails.org/ticket/11402

Any thoughts on how these two instances should be treated differently? <% content_for :footer, @footer_content %> vs. <%= content_for :footer, @footer_content %>

I have a more thorough exploration in the ticket.

Stephen

2

Perhaps that's just a typo in the docs? I always thought content_for stuffed the data in a @content_for_* ivar for use elsewhere in the template or layout. I don't think it should also output the data.

3

Yeah, I mentioned the possibility of a typo in the ticket, which would somewhat resolve things, though the behavior still isn't completely clear in the documentation: I can especially see people new to the framework making mistakes with <%=.

Stephen

4

Aren't you meant to use:

  <%= yield :footer -%>

In order to get anything you've stored in <% content_for(:footer) -%> out?

Or am I missing the point?

5

Yes, you are meant to do so, but the documentation is confusing in the discussion of declaring that content to begin with. This especially:

<%= content_for :footer %>

Two problems: 1. Uses an "=" ERB tag. 2. Doesn't declare any content.