public ActionResult AddSurveyCompletion(CreateCompletionDTO completion)
{
var survey = _surveyRepository.GetById(completion.SurveyId);
var newCompletion = new Completion
(
survey: survey,
answers: _mapper.Map <List <Answer> >(completion.Answers),
completingUserId: completion.CompletingUserId
);
newCompletion.SetCompletionDateNow();
survey.AddCompletion(newCompletion);
_surveyRepository.Update(survey);
_surveyRepository.Save();
_surveyRepository.GetById(survey.Id);
return(CreatedAtAction(nameof(GetCompletion), new { completionId = newCompletion.Id }, _mapper.Map <CompletionDTO>(newCompletion)));
}