Question

Is this the expected behavior? Note how the line break character gets lost.

ruby-1.9.2-p136 :001 > ActiveSupport::JSON.decode("{\"content\": \"active\n\nsupport\"}")
 => {"content"=>"active\nsupport"}

The same happens with unicode-escaped line breaks:

ruby-1.9.2-p136 :002 > ActiveSupport::JSON.decode("{\"content\": \"active\u000a\u000asupport\"}")
 => {"content"=>"active\nsupport"}

I’m using rails 3.0.3.

Answer 1

I eventually came across this ticket: https://rails.lighthouseapp.com/projects/8994/tickets/3479-activesupportjson-fails-to-decode-unicode-escaped-newline-and-literal-newlines

It seems this is a bug in ActiveSupport that will be fixed in Rails 3.0.5. For now I have patched activesupport and things are working as expected.

ruby-1.9.2-p136 :001 > ActiveSupport::JSON.decode("{\"content\": \"active\n\nsupport\"}")
 => {"content"=>"active\n\nsupport"}