public StudentVM DetachStudentFromGroup(AttachDetachStudentWithGroupDTO detachStudentWithGroupDTO)
{
if (detachStudentWithGroupDTO == null)
{
throw new ArgumentNullException($"DTO is null");
}
var student = _dbContext.Users.OfType <Student>().FirstOrDefault(t => t.Id == detachStudentWithGroupDTO.StudentId);
if (student == null || !_userManager.IsInRoleAsync(student, "Student").Result)
{
throw new ArgumentNullException($"Student is null or user is not a student");
}
var group = _dbContext.Groups.FirstOrDefault(x => x.Id == detachStudentWithGroupDTO.GroupId);
if (group == null)
{
throw new ArgumentNullException($"Group is null");
}
student.GroupId = null;
student.Group = null;
group.Students.Remove(student);
_dbContext.SaveChanges();
var studentVm = _mapper.Map <StudentVM>(student);
return(studentVm);
}
public IActionResult DetachStudentFromGroup(AttachDetachStudentWithGroupDTO attachDetachStudentWithGroupDTO)
{
if (ModelState.IsValid)
{
try
{
var studentVM = _studentGroupService.DetachStudentFromGroup(attachDetachStudentWithGroupDTO);
if (studentVM != null)
{
return(RedirectToAction("Details", "Group", new { id = attachDetachStudentWithGroupDTO.GroupId }));
}
}
catch (Exception)
{
return(View("Error"));
}
}
return(View());
}
