If you look at the compiled template, any <% %> blocks are compiled to something like this:
_buf << '<div ...' Hence if you had the following (silly) ERB: <% foo do |b| %> <li <%= b %> > <% end %> the block portion would get compiled to: _buf << '<li '; _buf << ( b ) _buf << ' >' Hence, if you yield to this block, the return value of the yield will be _buf. _buf contains the portion of the template that has been rendered so far. And if the yield is the last statement, then the implicit return value will be _buf. So far so good. Now you're wondering, hey, the output should not be in the template unless you're using <%= %>, right? This should be true, but in the interest of backwards compatibility, Rails 3 has append_if_string= - this appends the return value of <% %> blocks if the value is a string (so old form_for's, etc. don't break). _buf is conveniently a string as well, and gets added to the page. -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
