db/migrate/20161113084725_remove_date_from_timeslot.rb
class RemoveDateFromTimeslot < ActiveRecord::Migration
def change
remove_column :timeslots, :date, :date
remove_column :timeslots, :starttime
remove_column :timeslots, :endtime
add_column :timeslots, :starttime, :datetime
add_column :timeslots, :endtime, :datetime
end
end