Merge pull request #697 from normanjaeckel/Fix_Post_DB_Setup_Signal

Fix #696

openslides/motion/signals.py

@@ -136,7 +136,8 @@ def create_builtin_workflows(sender, **kwargs):
     """
     Creates a simple and a complex workflow.
     """
-    workflow_1 = Workflow.objects.create(name=ugettext_noop('Simple Workflow'))
+    workflow_1, created = Workflow.objects.get_or_create(name=ugettext_noop('Simple Workflow'))
+    if created:
         state_1_1 = State.objects.create(name=ugettext_noop('submitted'),
                                          workflow=workflow_1,
                                          allow_create_poll=True,
@@ -155,7 +156,8 @@ def create_builtin_workflows(sender, **kwargs):
         workflow_1.first_state = state_1_1
         workflow_1.save()
 
-    workflow_2 = Workflow.objects.create(name=ugettext_noop('Complex Workflow'))
+    workflow_2, created = Workflow.objects.get_or_create(name=ugettext_noop('Complex Workflow'))
+    if created:
         state_2_1 = State.objects.create(name=ugettext_noop('published'),
                                          workflow=workflow_2,
                                          allow_support=True,

openslides/participant/signals.py

@@ -68,8 +68,9 @@ def create_builtin_groups(sender, **kwargs):
     Creates the builtin groups: Anonymous, Registered, Delegates and Staff.
     """
     # Check whether the group pks 1 to 4 are free
-    for pk in range(1, 5):
-        assert not Group.objects.filter(pk=pk).exists(), 'There should not be any group with pk 1, 2, 3 or 4.'
+    if Group.objects.filter(pk__in=range(1, 5)).exists():
+        # Do completely nothing if there are already some of our groups in the database.
+        return
 
     # Anonymous and Registered
     ct_projector = ContentType.objects.get(app_label='projector', model='projectorslide')