public IHttpActionResult Get(Guid id)
{
var item = _clashRepository.Find(id);
if (item == null)
{
return(NotFound());
}
var parentclash = string.IsNullOrWhiteSpace(item.ParentExternalidentifier)
? null
: _clashRepository.FindByExternal(item.ParentExternalidentifier)?.FirstOrDefault();
return(Ok(_mapper.Map <ClashModel>(Tuple.Create(item, parentclash))));
}