Class: GtfsEngine::Calendar

Inherits:
ActiveRecord::Base
  • Object
show all
Defined in:
app/models/gtfs_engine/calendar.rb

Class Method Summary collapse

Class Method Details

.from_date_string(date) ⇒ ActiveRecord_Relation

This method will add/remove entries listed in CalendarDate and will also filter out entries which don’t match the correct day-of-week.

TODO: Currently, this method does 3 SQL queries. Try to lower this.

Returns:

  • (ActiveRecord_Relation) —

    the set of Calendars that include the given date.



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# File 'app/models/gtfs_engine/calendar.rb', line 22

def from_date_string(date)
  dates = GtfsEngine::CalendarDate.where(date: date)

  add = dates.where(exception_type: 1).pluck(:service_id)
  query =
    if add.any?
      where('((start_date <= :date AND end_date >= :date)
             OR service_id IN (:ids)', date: date, ids: add)
    else
      where('(start_date <= :date AND end_date >= :date)', date: date)
    end

  query = where_day_of_week(query, date)

  rem = dates.where(exception_type: 2).pluck(:service_id)
  if rem.any?
    query.where('(service_id NOT IN (?))', rem)
  else
    query
  end
end