public async Task <IActionResult> OnPostAsync()
{
if (!ModelState.IsValid)
{
return(Page());
}
_context.Attach(Group).State = EntityState.Modified;
try
{
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!GroupExists(Group.Id))
{
return(NotFound());
}
else
{
throw;
}
}
return(RedirectToPage("./Index"));
}
public async Task <IActionResult> OnPostAsync()
{
if (!ModelState.IsValid)
{
return(Page());
}
TeacherSubjects = await _context.TeacherSubject
.Where(ts => ts.TeacherId == Teacher.Id).ToListAsync();
_context.Attach(Teacher).State = EntityState.Modified;
_context.TeacherSubject.AddRange(Subjects.Where(s => s.ForTeacher && !TeacherSubjects.Any(t => t.SubjectId == s.Id))
.Select(q => new TeacherSubject {
SubjectId = q.Id, TeacherId = Teacher.Id
}));
List <TeacherSubject> lst = new List <TeacherSubject>();
for (int i = 0; i < Subjects.Count; i++)
{
if (!Subjects[i].ForTeacher && TeacherSubjects.Any(t => t.SubjectId == Subjects[i].Id))
{
lst.Add(TeacherSubjects.FirstOrDefault(t => t.TeacherId == Teacher.Id && t.SubjectId == Subjects[i].Id));
}
}
_context.TeacherSubject.RemoveRange(lst);
//_context.TeacherSubject.RemoveRange(Subjects.Where(s => !s.ForTeacher && TeacherSubjects.Any(t => t.SubjectId == s.Id))
// .Select(s => TeacherSubjects.Where(t => t.SubjectId == s.Id && t.TeacherId == Teacher.Id)));
//var lst = (IEnumerable<TeacherSubject>)TeacherSubjects
// .Select(t => Subjects.Where(s => s.Id != t.SubjectId && s.ForTeacher));
//_context.TeacherSubject.RemoveRange(lst);
try
{
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!TeacherExists(Teacher.Id))
{
return(NotFound());
}
else
{
throw;
}
}
return(RedirectToPage("./Index"));
}
