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Editorial Team
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Asked: 2026-06-18T11:12:30+00:00

I am following a ruby on rails tutorial and I have the following got

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I am following a ruby on rails tutorial and I have the following got in a users view <% provide(:title, 'Sign up') %> just wondering what exactly that is doing?

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  1. Editorial Team

    This should answer your question:

    content_for?

    simply checks whether any content has been captured yet using #content_for

    Useful to render parts of your layout differently based on what is in your views.

    Examples

    Perhaps you will use different css in you layout if no #content_for :right_column

    <%# This is the layout %>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
 <title>My Website</title>
 <%= yield :script %>
</head>
<body class="<%= content_for?(:right_col) ? 'one-column' : 'two-column' %>">
 <%= yield %>
 <%= yield :right_col %>

    provide(name, content = nil, &block)

    The same as content_for but when used with streaming flushes straight back to the layout. In other words, if you want to concatenate several times to the same buffer when rendering a given template, you should use content_for, if not, use provide to tell the layout to stop looking for more contents.

    Short answer:
    In the Ruby on Rails tutorial the special rails function provide is used to set a different title on each page. Depending on which static_page you are on the title is set accordingly. Further explanation is given in 3.3.3 ("Embedded Ruby") in the Ruby on Rails tutorial book.

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