Template file not rendering result of form_for in Rails 4
form-for, ruby-on-rails, ruby-on-rails-4
Solution
You're missing the `=` sign: `<%= form_for @post do |f| %>`
Problem
I'm recreating the steps in this rails tutorial: http://www.youtube.com/watch?v=tUH1hewXnC0 If you seek to 7:35, you'll see a form_for block the user has created. When I add that code and view the page in a browser, the page renders fine but there's no html where the form should be -- not even empty tags. I've confirmed that it's not an issue with a missing migration or browser cacheing. I've simplified the problem down, and now my show.html.erb template file is just: ``` <% form_for @post do |f| %> testing <% debugger %> <% end %> <% for i in 0..5 %> <%= i %> <% end %> ``` (The second block is just to make sure the rendering is working) The rendered html is: ``` ... bunch of header stuff here ... <body> 0 1 2 3 4 5 </body> </html> ``` "testing" is not getting rendered as part of the html. I put in that debugger line so I could use the debugger gem with rails server --debugger . Using that gets me to this point: ``` [196, 205] in /Users/Ben/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/actionpack-4.0.0/lib/action_view/helpers/capture_helper.rb 196 buf = ActionView::OutputBuffer.new 197 buf.force_encoding(output_buffer.encoding) if output_buffer 198 end 199 self.output_buffer, old_buffer = buf, output_buffer 200 yield => 201 output_buffer 202 ensure 203 self.output_buffer = old_buffer 204 end 205 (rdb:48) p output_buffer " testing\n" ``` So, the form_for is getting executed, but not getting delivered all the way through to the output html somehow. (that's why I'm not bothering to show you that I'm correctly initializing @post.) I can't find any mention of similar problems online, but I'm probably just not looking for the right things. Any ideas?