public void Add(Course course)
{
SetRelativeEntities(course);
db.Teachers.Attach(course.Teacher);
db.Courses.Add(course);
db.SaveChanges();
}
public void Edit(Course course)
{
var editingCourse = db.Courses.Find(course.id);
SetRelativeEntities(editingCourse, course);
editingCourse.name = course.name;
db.Courses.AddOrUpdate(editingCourse);
db.SaveChanges();
}
private void SetRelativeEntities(Course course)
{
var teacher = db.Teachers.Find(course.Teacher.id);
course.Teacher = teacher;
}
private void SetRelativeEntities(Course oldCourse, Course newCourse)
{
var teacher = db.Teachers.Find(newCourse.Teacher.id);
oldCourse.Teacher = teacher;
}