Eu tenho os mesmos problemas e resolvi depois de horas pesquisando com um patch de macaco.
module ActiveSupport #:nodoc:
class SafeBuffer < String
def safe_concat(value)
value = force_utf8_encoding(value)
raise SafeConcatError unless html_safe?
original_concat(value)
end
def concat(value)
value = force_utf8_encoding(value)
if !html_safe? || value.html_safe?
super(value)
else
super(ERB::Util.h(value))
end
end
alias << concat
private
def force_utf8_encoding(value)
self.force_encoding('UTF-8').html_safe unless self.encoding.name == 'UTF-8'
value = (value).force_encoding('UTF-8').html_safe unless value.nil? || value.encoding.name == 'UTF-8'
value
end
end
end
