Hi Luke, We're having this problem with Rails 3. Helpers what worked in Rails 2 are basically this:
def helper(&block) block.call # Returns the entire partial up to the helper call twice end Adding return '' to the end helps, but as Avram said, this is only the behavior I'd expect if the helper was called with "<%= %>". In our testing, calling with and without the = made no difference. Best, Milan On Sep 5, 1:12 pm, Luke Cowell <[email protected]> wrote: > I haven't tested this in rails3, but this is what I do to capture the > output of a block in rails 2. > > #my_helper.rb > if block_given? > block_text = capture(&block) > end > > #view_file.html.erb > <% my_helper do %> > ##anything output here is captured and returned to block_text > <% end %> > > Hope that helps. I wasn't sure if your question was rails3 specific or > if you just happened to be working with rails 3. > > Luke > > On Sep 3, 10:38 am, Avram Dorfman <[email protected]> wrote: > > > > > > > > > Hello, > > > I'm having a hard time understanding how you are supposed to write > > helpers that take blocks now in Rails 3. > > > According to 7.4.2 here: > > > http://edgeguides.rubyonrails.org/3_0_release_notes.html > > > you are supposed to write your helpers to return their result as text, > > rather than append to the accumulating content. > > > How do I execute the code in the block that has been passed to the > > helper without it appending to the content? My instincts, which are > > clearly wrong, are to just use "yield" like I would in any other method > > that takes a block. However, within the context of a helper method. > > "yield" seems to have a side effect of appending to the accumulating > > content. So, I have to do the following to suppress the intended output > > of the helper because the yield is already appending it: > > > module FooHelper > > def none_if_empty > > yield > > return '' > > end > > end > > > What is the proper way to write this helper in Rails 3? > > > Thanks, > > Avram > > -- > > Posted viahttp://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.
