public Achievement(Festival festival, Discipline discipline, Pupil pupil)
{
if (festival == null)
throw new ArgumentNullException(nameof(festival));
if (discipline == null)
throw new ArgumentNullException(nameof(discipline));
if (pupil == null)
throw new ArgumentNullException(nameof(pupil));
Festival = festival;
Discipline = discipline;
Pupil = pupil;
}
public static Achievement GetAchievement(SportsFestivalManagerContext connection, Festival festival, Discipline discipline, Pupil pupil)
{
var achievement = connection.Achievements.FirstOrDefault(x => x.FestivalId == festival.Id && x.DisciplineId == discipline.Id && x.PupilId == pupil.Id);
if (achievement == null)
connection.Achievements.Add(achievement = new Achievement(festival, discipline, pupil));
return achievement;
}