public IHttpActionResult AddTeacherToStudentSubject(string studentId, int subjectId, string teacherId)
{
Student student = studentsService.GetById(studentId);
Teacher teacher = teachersService.GetById(teacherId);
if (student == null || teacher == null || subjectsService.GetById(subjectId) == null)
{
return(NotFound());
}
try
{
if (!student.StudentAttendsSubject.Select(x => x.Subject.SubjectId).Contains(subjectId))
{
throw new NullReferenceException("Student doesn't attend this subject!");
}
else if (!teacher.TeacherTeachesSubject.Select(x => x.Subject?.SubjectId).Contains(subjectId))
{
throw new NullReferenceException("Teacher doesn't teach this subject and therefore cannot be added to this student-subject pair!");
}
else
{
logger.Info("Linking teacher with student-subject");
studentsService.AddTeacherToStudentSubject(studentId, subjectId, teacherId);
return(Ok(student.StudentAttendsSubject.Select(x => x.TacherTeachesSubject?.Teacher)));
}
}
catch (NullReferenceException e)
{
logger.Error(e.Message, "Adding teacher to student-subject pair");
return(ResponseMessage(Request.CreateErrorResponse(HttpStatusCode.BadRequest, e.Message)));
}
}
