Upgrading to Rails 3: <%= if expression %> raising error

StackOverflow https://stackoverflow.com/questions/5934000

Question

Ok looking over some podcasts I've seen that in Rails 3, we need to use the <%= %> tag now when we didn't before. However just putting this in my application.html.erb file:

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head></head>
<body>  
  <%= if true %>
true        
  <% end %>
</body>
</html>

does not render 'true' as I expected. Instead I get an error:

Showing /app/views/layouts/application.html.erb where line #5 raised:

/app/views/layouts/application.html.erb:5: syntax error, unexpected ')', expecting keyword_then or ';' or '\n'
  ');@output_buffer.append= ( if true );@output_buffer.safe_concat('
                                       ^
/app/views/layouts/application.html.erb:7: syntax error, unexpected keyword_end, expecting ')'
');   end 
         ^
/app/views/layouts/application.html.erb:10: syntax error, unexpected keyword_ensure, expecting ')'
/app/views/layouts/application.html.erb:12: syntax error, unexpected keyword_end, expecting ')'
Extracted source (around line #5):

2: <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
3: <head></head>
4: <body>  
5:   <%= if true %>
6: true        
7:   <% end %>
8: </body>

going back to the old <% %> tag fixes this problem. Is this correct? Did the rails developers decide to switch back to the old tag or am I missing something?

rails -v gets me: Rails 3.0.5

Any ideas?

No correct solution

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