public async Task EditLevelsOfTeacher(EditTeacherLevelsViewModel model)
{
var levelsForDeletion = this.db.LevelTeachers.Where(x => x.TeacherId == model.TeacherId).ToList();
this.db.LevelTeachers.RemoveRange(levelsForDeletion);
var teacher = await this.db.Teachers
.Include(t => t.QualifiedLevels)
.FirstOrDefaultAsync(x => x.Id == model.TeacherId);
var newLevelsIds = model.Levels.Where(x => x.Selected).Select(x => x.Id).ToArray();
var newQualifiedLevels = this.db.Levels
.Where(x => newLevelsIds.Contains(x.Id))
.Select(ql => new LevelTeacher {
Level = ql
})
.ToArray();
foreach (var item in newQualifiedLevels)
{
teacher.QualifiedLevels.Add(item);
}
await this.db.SaveChangesAsync();
}
public async Task <IActionResult> EditLevels(EditTeacherLevelsViewModel model)
{
int teacherId = await CheckTeacherId(this.TempData["teacherId"]);
model.TeacherId = teacherId;
await this.levelsService.EditLevelsOfTeacher(model);
return(await Task.Run(() => this.RedirectToAction("Details", new { teacherId = model.TeacherId })));
}
public EditTeacherLevelsViewModel GetLevelsForEdit(int teacherId)
{
var allLevelsIds = this.db.LevelTeachers
.Where(lt => lt.TeacherId == teacherId)
.Select(x => x.LevelId)
.ToList();
var levels = this.db.Levels.Select(l => new LevelSelectionViewModel
{
Id = l.Id,
Name = l.Name,
Selected = allLevelsIds.Contains(l.Id)
})
.OrderBy(x => x.Id)
.ToArray();;
var model = new EditTeacherLevelsViewModel {
Levels = levels
};
return(model);
}
