public ActionResult AssignTeacher(int? id)
{
if (!id.HasValue)
{
return RedirectToAction("ManageTeachers");
}
TeachersAssignVM model = new TeachersAssignVM();
model.Id = id.Value;
model.Courses = unitOfWork.CourseRepository.GetAll().ToList();
return View(model);
}
public ActionResult AssignTeacher(TeachersAssignVM model)
{
if (ModelState.IsValid)
{
Course selectedCourse = unitOfWork.CourseRepository.GetById(model.SelectedCourseId);
if (selectedCourse == null)
{
model.Courses = unitOfWork.CourseRepository.GetAll().ToList();
TempData.FlashMessage("Select a course", null, FlashMessageTypeEnum.Red);
return View(model);
}
Teacher teacher = unitOfWork.TeacherRepository.GetById(model.Id, true);
List<CoursesSubjects> css = unitOfWork.CoursesSubjectsRepository.GetByCourseId(model.SelectedCourseId);
int a;
// keys to be assigned for the course
List<int> ids = Request.Form.AllKeys.Where(x =>
int.TryParse(x, out a)).Select<string, int>(x => int.Parse(x)).ToList();
List<int> newIds = new List<int>(ids);
teacher.CourseSubjects.RemoveAll(x =>
{
if(x.CourseId != selectedCourse.Id)
{
return false;
}
if (ids.Contains(x.Id))
{
newIds.Remove(x.Id);
return false;
}
return true;
});
teacher.CourseSubjects.AddRange(css.Where(cs =>
cs.CourseId == selectedCourse.Id &&
newIds.Contains(cs.SubjectId)));
unitOfWork.Save();
return RedirectToAction("ManageTeachers");
}
model.Courses = unitOfWork.CourseRepository.GetAll().ToList();
return View(model);
}
