Comments on: ERB block comments in RHTML templates using Ruby on Rails http://blog.localkinegrinds.com/2008/05/02/erb-block-comments-in-rhtml-templates-using-ruby-on-rails/ Everything you've ever thought, but never had the balls to say. Tue, 22 Nov 2011 07:17:58 +0000 hourly 1 By: Commenting Out ERb code in Rails (*.html.erb) | Ruby on Rails Notes http://blog.localkinegrinds.com/2008/05/02/erb-block-comments-in-rhtml-templates-using-ruby-on-rails/comment-page-1/#comment-30006 Commenting Out ERb code in Rails (*.html.erb) | Ruby on Rails Notes Mon, 20 Apr 2009 12:51:24 +0000 http://blog.localkinegrinds.com/?p=169#comment-30006 [...] <melvinram> nat2610: http://blog.localkinegrinds.com/2008/05/02/erb-block-comments-in-rhtml-templates-using-ruby-on-rails... [...] [...] <melvinram> nat2610: http://blog.localkinegrinds.com/2008/05/02/erb-block-comments-in-rhtml-templates-using-ruby-on-rails... [...]

]]> By: Charlie http://blog.localkinegrinds.com/2008/05/02/erb-block-comments-in-rhtml-templates-using-ruby-on-rails/comment-page-1/#comment-29827 Charlie Sat, 03 Jan 2009 18:38:14 +0000 http://blog.localkinegrinds.com/?p=169#comment-29827 Just struggled with this after upgrading to Ruby 1.8.7 and Rails 2.2.2. Here is a relevant portion from the inline documentation for ERB: | ERB recognizes certain tags in the provided template and converts them based on the rules below: | | | | | % a line of Ruby code -- treated as (optional -- see ERB.new) | %% replaced with % if first thing on a line and % processing is used | -- replace with respectively So, contrary to some suggestions (http://www.ruby-forum.com/topic/154835#693739), comments ARE allowed in ERB, but it seems to be safe only to do so when the whole embedded expression is a comment, i.e.: If your 'bad comments' are consistent in their usage of whitespace around the hash mark, then it ought to be easy to do a grep search-and-replace to change all your bad comments to look like this, which WILL work in Ruby 1.8.7: Just struggled with this after upgrading to Ruby 1.8.7 and Rails 2.2.2.

Here is a relevant portion from the inline documentation for ERB:

| ERB recognizes certain tags in the provided template and converts them based on the rules below:
|
|
|
|
| % a line of Ruby code — treated as (optional — see ERB.new)
| %% replaced with % if first thing on a line and % processing is used
| — replace with respectively

So, contrary to some suggestions (http://www.ruby-forum.com/topic/154835#693739), comments ARE allowed in ERB, but it seems to be safe only to do so when the whole embedded expression is a comment, i.e.:

If your ‘bad comments’ are consistent in their usage of whitespace around the hash mark, then it ought to be easy to do a grep search-and-replace to change all your bad comments to look like this, which WILL work in Ruby 1.8.7:

]]> By: Commenting Out ERb code in Rails (*.html.erb) « Ruby on Rails Notes http://blog.localkinegrinds.com/2008/05/02/erb-block-comments-in-rhtml-templates-using-ruby-on-rails/comment-page-1/#comment-29762 Commenting Out ERb code in Rails (*.html.erb) « Ruby on Rails Notes Wed, 01 Oct 2008 07:05:39 +0000 http://blog.localkinegrinds.com/?p=169#comment-29762 [...] <melvinram> nat2610: http://blog.localkinegrinds.com/2008/05/02/erb-block-comments-in-rhtml-templates-using-ruby-on-rails... [...] [...] <melvinram> nat2610: http://blog.localkinegrinds.com/2008/05/02/erb-block-comments-in-rhtml-templates-using-ruby-on-rails... [...]

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