public GroupVm DeleteSubjectToGroup(AddOrDeleteSubjectToGroupDto deleteSubjectToGroupDto)
{
if (deleteSubjectToGroupDto == null)
{
throw new ArgumentNullException($"Dto of type is null");
}
var subjectGroup = _dbContext.SubjectGroup.FirstOrDefault(sg => sg.GroupId == deleteSubjectToGroupDto.GroupId && sg.SubjectId == deleteSubjectToGroupDto.SubjectId);
if (subjectGroup == null)
{
throw new ArgumentNullException($"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 == deleteSubjectToGroupDto.GroupId);
var groupVm = Mapper.Map <GroupVm>(group);
return(groupVm);
}
public GroupVm AddSubjectToGroup(AddOrDeleteSubjectToGroupDto addSubjectToGroupDto)
{
if (addSubjectToGroupDto == null)
{
throw new ArgumentNullException($"Dto of type is null");
}
var subjectGroup = _dbContext.SubjectGroup.FirstOrDefault(sg => sg.GroupId == addSubjectToGroupDto.GroupId && sg.SubjectId == addSubjectToGroupDto.SubjectId);
if (subjectGroup != null)
{
throw new ArgumentNullException($"There is such attachment already defined.");
}
subjectGroup = new SubjectGroup
{
GroupId = addSubjectToGroupDto.GroupId,
SubjectId = addSubjectToGroupDto.SubjectId
};
_dbContext.SubjectGroup.Add(subjectGroup);
_dbContext.SaveChanges();
var group = _dbContext.Groups.FirstOrDefault(x => x.Id == addSubjectToGroupDto.GroupId);
var groupVm = Mapper.Map <GroupVm>(group);
return(groupVm);
}
