public GroupVM DetachSubjectFromGroup(AttachDetachSubjectWithGroupDTO detachSubjectWithGroupDTO)
{
if (detachSubjectWithGroupDTO == null)
{
throw new ArgumentNullException($"DTO is null");
}
var subjectGroup = _dbContext.SubjectGroups.FirstOrDefault(sg => sg.GroupId == detachSubjectWithGroupDTO.GroupId && sg.SubjectId == detachSubjectWithGroupDTO.SubjectId);
if (subjectGroup == null)
{
throw new ArgumentNullException($"This subject is not attached with this group");
}
_dbContext.SubjectGroups.Remove(subjectGroup);
_dbContext.Remove(subjectGroup);
_dbContext.SaveChanges();
var group = _dbContext.Groups.FirstOrDefault(x => x.Id == detachSubjectWithGroupDTO.GroupId);
var groupVM = _mapper.Map <GroupVM>(group);
return(groupVM);
}
public IActionResult DetachSubjectFromGroup(AttachDetachSubjectWithGroupDTO attachDetachSubjectWithGroupDTO)
{
if (ModelState.IsValid)
{
try
{
var groupVM = _subjectGroupService.DetachSubjectFromGroup(attachDetachSubjectWithGroupDTO);
if (groupVM != null)
{
return(RedirectToAction("Details", "Group", new { id = attachDetachSubjectWithGroupDTO.GroupId }));
}
}
catch (Exception)
{
return(View("Error"));
}
}
return(View());
}
public GroupVM AttachSubjectWithGroup(AttachDetachSubjectWithGroupDTO attachSubjectWithGroupDTO)
{
if (attachSubjectWithGroupDTO == null)
{
throw new ArgumentNullException($"DTO is null");
}
var subjectGroup = _dbContext.SubjectGroups.FirstOrDefault(sg => sg.GroupId == attachSubjectWithGroupDTO.GroupId && sg.SubjectId == attachSubjectWithGroupDTO.SubjectId);
if (subjectGroup != null)
{
throw new ArgumentNullException($"Subject is already attached to this group");
}
subjectGroup = new SubjectGroup
{
GroupId = attachSubjectWithGroupDTO.GroupId,
SubjectId = attachSubjectWithGroupDTO.SubjectId,
};
_dbContext.SubjectGroups.Add(subjectGroup);
_dbContext.SaveChanges();
var group = _dbContext.Groups.FirstOrDefault(x => x.Id == attachSubjectWithGroupDTO.GroupId);
var groupVM = _mapper.Map <GroupVM>(group);
return(groupVM);
}
