The project's database.
The direction associated with the table that will be updated.
How many seats will the table have now.
The date of the trips in YYYY-MM-DD format..
The configuration as updated in the database.
If the number goes up, waitlist candidates are promoted from oldest to newest.
If the number goes down, confirmed candidates are demoted from newest to oldest.
Name is the tie-breaker criteria.
DatabaseSelectionError Thrown in case the "configuration" table has no rows.
Updates the seat count of a trip tale.