public StudentSubjectTeacherRelationDTO GetById(int?id)
{
try
{
StudentSubjectRelation findingRelation =
ValidateModule.ValidateStudentSubjectTeacherRelation(id);
return(AutoMap <StudentSubjectRelation, StudentSubjectTeacherRelationDTO> .Map(findingRelation));
}
catch (ValidationException)
{
throw;
}
}
public void Add(StudentSubjectTeacherRelationDTO relation)
{
try
{
ValidateModule.ValidateStudent(relation.StudentId);
ValidateModule.ValidateSubject(relation.SubjectId);
ValidateModule.ValidateTeacher(relation.TeacherId);
StudentSubjectRelation studentSubjectRelation =
AutoMap <StudentSubjectTeacherRelationDTO, StudentSubjectRelation> .Map(relation);
Database.StudentSubjectRelations.Add(studentSubjectRelation);
Database.Commit();
}
catch (ValidationException)
{
throw;// new ValidationException(ex.Message, ex.Property);
}
}
public StudentSubjectRelation ValidateStudentSubjectTeacherRelation(int?relationId)
{
if (relationId == null || relationId == 0)
{
throw new ValidationException("Задан неверный Id связи.", "");
}
StudentSubjectRelation findingRelation =
_database.StudentSubjectRelations
.GetById((int)relationId);
try
{
return(ValidateStudentSubjectTeacherRelation(findingRelation));
}
catch (ValidationException)
{
throw;
}
}
public StudentSubjectRelation ValidateStudentSubjectTeacherRelation(StudentSubjectRelation relation) =>
relation ?? throw new ValidationException("Связь не найдена", "");
