From 4aa1adece1b82e31529874780039bd48ef25c335 Mon Sep 17 00:00:00 2001
From: Jan Szejko <janek37@gmail.com>
Date: Mon, 19 Nov 2018 14:01:47 +0100
Subject: [PATCH] force non-empty answers

---
 wtem/forms.py | 2 ++
 wtem/views.py | 4 +++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/wtem/forms.py b/wtem/forms.py
index a434854..08a1e19 100644
--- a/wtem/forms.py
+++ b/wtem/forms.py
@@ -61,6 +61,8 @@ class WTEMSingleForm(forms.ModelForm):
         if exercise_id != str(exercise['id']):
             raise ValueError('wrong exercise id')
         for answer in posted_answers.values():
+            if not answer.get('closed_part', True):
+                raise ValueError('no answer')
             answers[exercise_id] = answer
         submission.answers = json.dumps(answers)
         submission.save()
diff --git a/wtem/views.py b/wtem/views.py
index be78eb5..1d1074c 100644
--- a/wtem/views.py
+++ b/wtem/views.py
@@ -132,9 +132,11 @@ def form_single(request, submission_id, key):
             except ValueError as e:
                 if e.message == 'wrong exercise id':
                     messages.error(request, u'Próba wysłania odpowiedzi ponownie lub poza kolejnością')
+                elif e.message == 'no answer':
+                    messages.error(request, u'Wybierz przynajmniej jedną odpowiedź')
             return HttpResponseRedirect(reverse('wtem_form', kwargs={'submission_id': submission_id, 'key': key}))
         else:
-            raise Exception
+            raise Exception(u'Błędna wartość w formularzu')
 
 
 @cache_until_start
-- 
2.20.1