Fixed #1275 (Creating assignment pdf failed)

openslides/assignment/views.py

@@ -424,27 +424,36 @@ class AssignmentPDF(PDFView):
             data_votes.append(row)
 
         # Add valid votes row
-        if poll.votesvalid is not None:
         footrow_one = []
         footrow_one.append(_("Valid votes"))
+        votesvalid_is_used = False
         for poll in polls:
             footrow_one.append(poll.print_votesvalid())
+            if poll.votesvalid is not None:
+                votesvalid_is_used = True
+        if votesvalid_is_used:
             data_votes.append(footrow_one)
 
         # Add invalid votes row
-        if poll.votesinvalid is not None:
         footrow_two = []
         footrow_two.append(_("Invalid votes"))
+        votesinvalid_is_used = False
         for poll in polls:
             footrow_two.append(poll.print_votesinvalid())
+            if poll.votesinvalid is not None:
+                votesinvalid_is_used = True
+        if votesinvalid_is_used:
             data_votes.append(footrow_two)
 
         # Add votes cast row
-        if poll.votescast is not None:
         footrow_three = []
         footrow_three.append(_("Votes cast"))
+        votescast_is_used = False
         for poll in polls:
             footrow_three.append(poll.print_votescast())
+            if poll.votescast is not None:
+                votescast_is_used = True
+        if votescast_is_used:
             data_votes.append(footrow_three)
 
         table_votes = Table(data_votes)

tests/assignment/test_pdf.py

@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+from django.test.client import Client
+
+from openslides.assignment.models import Assignment
+from openslides.participant.models import User
+from openslides.utils.test import TestCase
+
+
+class AssignmentPDFTest(TestCase):
+    """
+    Tests for assignment PDF.
+    """
+    def setUp(self):
+        # Admin
+        self.admin = User.objects.get(pk=1)
+        self.admin_client = Client()
+        self.admin_client.login(username='admin', password='admin')
+
+    def test_render_pdf(self):
+        Assignment.objects.create(name='assignment_name_ith8qua1Eiferoqu5ju2', description="test", posts=1)
+        response = self.admin_client.get('/assignment/print/')
+        self.assertEqual(response.status_code, 200)