rails_join

Doing a join on an array containing html safe strings will produce an html unsafe string.

Rails provides a helper called safe_join that will always produce an html safe string.

This gem modifies Array#join so that it returns an html safe string when the first element is an html safe string. This is similar to s1 + s2 returning an html safe string if and only if s1 is html safe. If the first element is not an html safe string (or does not exist), then Array#join returns a normal string, as was previously the case. Again, this is similar to s1 + s2 returning a normal string if s1 is a normal string, even if s2 is an html safe string.

links = [link_to("Home", "/"), link_to("Profile", "/profile")]
desired = links[0] + " > " + links[1]
joined  = links.join(" > ")
joined == desired # => false
joined.html_safe? # => false
require 'rails_join'
joined  = links.join(" > ")
joined == desired # => true
joined.html_safe? # => true

Installation

Simply add to your Gemfile:

gem "rails_join"

Run bundle install and you're done.

Runs on all versions of Ruby and all versions of Rails >= 3.0

Why?

See: https://github.com/rails/rails/pull/3716

Copyright

Copyright (c) 2012 Marc-Andre Lafortune. See LICENSE.txt for further details.