Question

this is a way that i am passing subject line to a methods

@subject_text = html_subject(@customer_alert.alert.name)
@subject_text = html_sub(@customer_alert.alert.name)

and this are the two methods where i wanna replace all special character

def html_subject(s)
  s = s.to_s
  if s.html_safe?
    s
  else

    s.gsub(/[&><"]/) { |special| CustomerAlert::SUBJECT_LINE[special] }
  end
 end
def html_sub(s)
  s = s.to_s
  if s.html_safe?
    s
  else

   if s.gsub(/&/,'&')
   end
   #{ |special| CustomerAlert::SUBJECT_LINE[special] }

   if s.gsub(/>/,'>')
   end

   if  s.gsub(/&lt;/,'<')
   end

   if s.gsub(/&quot;/,'"')

end
 s
   end
  end

and constant defined in model is

 SUBJECT_LINE = { '&amp;' => '&',  '&gt;' => '>',   '&lt;' => '<', '&quot;' => '"' }

but first methods call all special character is replaced by null
and second method call not returning any value

Answer 1

Instead of this , you can use sanitize helper to remove special character.

Check the link :
http://api.rubyonrails.org/classes/ActionView/Helpers/SanitizeHelper.html