Safari Books Online is a digital library providing on-demand subscription access to thousands of learning resources.
- Create BookmarkCreate Bookmark
- Create Note or TagCreate Note or Tag
- DownloadDownload
- PrintPrint
2. Rails on the Web > Adding Logic to the View
Adding Logic to the View
You can also put more sophisticated logic into the views, thanks to the
<% and %> tags. (The opening tag lacks the = sign.) These tags let you put Ruby code
directly into your ERb files. We’ll start with a very simple example,
shown in Example 2-7, that
takes advantage of the count variable
in the controller. (This example is part of the ch02/hello03 code sample.)
Example 2-7. Modifying index.html.erb to present the @bonus message as many times as @count specifies
<h1><%= @message %></h1> <p>This is a greeting from app/views/hello/index.html.erb</p><% for i in 1..@count %><p><%= @bonus %></p><% end %>
The count variable now controls
the number of times the bonus message appears because of the for...end loop, which will simply count from 1
to the value of the count
variable.