app/views/autocomplete_time_tables/index.rabl
collection @time_tables, :object_root => false
node do |time_table|
{ :id => time_table.id, :comment => time_table.comment,
:time_table_bounding => time_table.presenter.time_table_bounding,
:composition_info => time_table.presenter.composition_info,
:tags => time_table.tags.join(','),
:day_types => %w(monday tuesday wednesday thursday friday saturday sunday).select{ |d| time_table.send(d) }.map{ |d| time_table.human_attribute_name(d).first(2)}.join('')}
end