public function createAnswer(AnswerRequest $request)
 {
     // Check if current user created this application
     $input = $request->all();
     $application = Application::find($input['application_id']);
     $question = Question::find($input['question_id']);
     if ($application->user->id != Auth::user()->id) {
         $request->session()->flash('error', 'Only the person who created an application may answer questions for it.');
         return redirect('/login');
     }
     if ($application->status != 'new') {
         $request->session()->flash('error', 'Your application has been submitted, you may no longer make changes.');
         return redirect('/applications/' . $application->id . '/review');
     }
     // Check if an answer already exists for this question
     $answer = Answer::firstOrNew(['application_id' => $application->id, 'question_id' => $question->id]);
     // Add submitted information
     $answer->application_id = $application->id;
     $answer->question_id = $question->id;
     $answer->answer = $input['answer'];
     $answer->save();
     // Check if a file needs to be uploaded
     if ($question->type == 'file') {
         // Save uploaded file
         $upload = Document::handleUpload($request);
         // Save new document
         Document::createDocument($application, $upload, $answer);
     }
     $request->session()->flash('success', 'Your answer has been saved.');
     return redirect('/applications/' . $application->id);
 }