ruby:

  form ||= nil
  attribute ||= nil  # attribute name that the editor should be attached to
  collection ||= nil
  value_method ||= nil
  text_method ||= nil
  multiple ||= nil
  prompt ||= nil
  selected ||= nil

  options = {}
  html_options = {class: 'form-control bs-multiselect'}
  html_options[:multiple] = 'multiple' if multiple
  options[:prompt] = prompt if prompt && form
  html_options[:prompt] = prompt if prompt && !form

div
  - if form.present?
    = form.collection_select attribute, collection, value_method, text_method, options, html_options
  - else
    = select_tag attribute, options_from_collection_for_select(collection, value_method, text_method, selected), html_options