public UserModel RegisterOrUpdate(string name, int age)
{
var student = _context.Users.Where(w => w.Name == name).FirstOrDefault();
if (student == null)
{
student = new UserModel();
student.Name = name;
student.Age = age;
_context.Users.Add(student);
_context.SaveChanges();
}
else if (student.Age != age)
{
student.Age = age;
_context.Users.Attach(student);
_context.Entry(student).State = EntityState.Modified;
_context.SaveChanges();
}
return(student);
}
public void SignUp(int courseID, int studentID)
{
//get course
var savedCourse = this.GetByID(courseID);
if (savedCourse == null)
{
throw new CourseNotFoundException("The course does not exists");
}
if (savedCourse.CourseStudent.Count == savedCourse.MaxSeats)
{
throw new CourseFullException("The selected course is full. Please, select another one.");
}
//check if student isn't already in this course
if (savedCourse.CourseStudent.Any(i => i.StudentId == studentID))
{
throw new StudentAlreadyOnCourseException("The selected student is already on this course. Please, select another one.");
}
//get student
var savedStudent = this.GetByID(studentID);
if (savedStudent == null)
{
throw new StudentNotFoundException("The selected student does not exists");
}
var newStudent = new CourseStudent();
newStudent.CourseId = courseID;
newStudent.StudentId = studentID;
//sign up student to a course
savedCourse.CourseStudent.Add(newStudent);
//save changes
_chamaContext.SaveChanges();
}
public void Register(CourseModel model)
{
_context.Courses.Add(model);
_context.SaveChanges();
}
public bool Commit()
{
return(_context.SaveChanges() > 0);
}
public int SaveChanges()
{
return(Db.SaveChanges());
}
