public async Task EditTeacherAsync(Teacher teacher, string[] Disciplines)
{
if (teacher.Id == 0)
{
await this.CreateTeacherAsync(teacher, Disciplines);
return;
}
else
{
foreach (var item in Disciplines)
{
Discipline discipline = await context.Disciplines
.Where(x => x.Name == item)
.FirstOrDefaultAsync();
TrainingCourse trainingCourse =
await CreateTrainingCourseAsync
(TrainingCourseDisciplineId: discipline.Id, TrainingCourseTeacherId: teacher.Id);
}
IQueryable<TrainingCourse> disciplinesForRemove = context.TrainingCourses
.Where(x => x.TeacherId == teacher.Id && !Disciplines.Contains(x.Discipline.Name));
foreach (var item in disciplinesForRemove)
{
context.Entry(item).State = EntityState.Deleted;
}
context.Entry(teacher).State = EntityState.Modified;
await context.SaveChangesAsync();
}
}
// GET: Teachers/Edit/5
public async Task<ActionResult> Edit(int? id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
Teacher teacher;
if (id == 0)
{
teacher = new Teacher()
{
TrainingCourses = new List<TrainingCourse>()
};
}
else
{
teacher = await repository.Teachers
.Include(x => x.Department)
.Include(x => x.TrainingCourses.Select(d => d.Discipline))
.Where(x => x.Id == id)
.FirstOrDefaultAsync();
if (teacher == null)
{
return HttpNotFound();
}
}
ViewBag.DepartmentId =
new SelectList(repository.Departments, "Id", "Name", teacher.DepartmentId);
ViewBag.Disciplines =
new MultiSelectList(repository.Disciplines.Select(x => x.Name), teacher.TrainingCourses.Select(x=>x.Discipline.Name));
return View(teacher);
}
public async Task CreateTeacherAsync(Teacher teacher, string[] Disciplines)
{
teacher.Id = 0;
context.Entry(teacher).State = EntityState.Added;
foreach (var item in Disciplines)
{
Discipline discipline = await context.Disciplines
.Include(x=>x.TrainingCourses)
.Where(x => x.Name == item)
.FirstOrDefaultAsync();
TrainingCourse trainingCouse = new TrainingCourse()
{
Teacher = teacher,
Discipline = discipline
};
discipline.TrainingCourses.Add(trainingCouse);
context.Entry(discipline).State = EntityState.Modified;
}
await context.SaveChangesAsync();
}
