select2 remote ajax multiple fix for rails

select2-multiple-ajax-rails

Rails expects an array of ids but because select2 uses a hidden input for multiple-ajax configuration, it returned a comma separated string. To get around this I did a check and conversion at the beginning of my strong params function:

if params[:interview_schedule] and params[:interview_schedule][:contact_ids] and params[:interview_schedule][:contact_ids][0].include?(",")
  params[:interview_schedule][:contact_ids] = params[:interview_schedule][:contact_ids][0].split(",")
end

Thanks to https://coderwall.com/p/cxrwsw# for the motivation.