public GroupVm AttachSubjectToGroup(AttachDetachSubjectGroupDto attachSubjectGroup)
{
if (attachSubjectGroup == null)
{
throw new ArgumentNullException($"Dto of type is null");
}
var subjectGroup = _dbContext.SubjectGroup.FirstOrDefault(sg => sg.GroupId == attachSubjectGroup.GroupId && sg.SubjectId == attachSubjectGroup.SubjectId);
if (subjectGroup != null)
{
throw new ArgumentNullException($"There is such attachment already defined.");
}
subjectGroup = new SubjectGroup
{
GroupId = attachSubjectGroup.GroupId,
SubjectId = attachSubjectGroup.SubjectId
};
_dbContext.SubjectGroup.Add(subjectGroup);
_dbContext.SaveChanges();
var group = _dbContext.Groups.FirstOrDefault(x => x.Id == attachSubjectGroup.GroupId);
var groupVm = Mapper.Map <GroupVm>(group);
return(groupVm);
}
public IActionResult AttachSubjectToGroup(AttachDetachSubjectGroupDto attachDetachSubjectGroupDto)
{
try
{
if (!ModelState.IsValid)
{
return(View());
}
_groupService.AttachSubjectToGroup(attachDetachSubjectGroupDto);
return(RedirectToAction("Index", "Subject"));
}
catch (Exception ex)
{
ModelState.AddModelError(string.Empty, ex.Message);
return(AttachDetachSubjectToGroupGetView());
}
}
public GroupVm DetachSubjectFromGroup(AttachDetachSubjectGroupDto detachDetachSubject)
{
if (detachDetachSubject == null)
{
throw new ArgumentNullException($"Dto of type is null");
}
var subjectGroup = _dbContext.SubjectGroup.FirstOrDefault(sg => sg.GroupId == detachDetachSubject.GroupId && sg.SubjectId == detachDetachSubject.SubjectId);
if (subjectGroup == null)
{
throw new ArgumentNullException($"The is no such attachment between group and subject");
}
_dbContext.SubjectGroup.Remove(subjectGroup);
_dbContext.Remove(subjectGroup);
_dbContext.SaveChanges();
var group = _dbContext.Groups.FirstOrDefault(x => x.Id == detachDetachSubject.GroupId);
var groupVm = Mapper.Map <GroupVm>(group);
return(groupVm);
}
