From 1e6b042d71d88572fb6924e8654cba06c574b51f Mon Sep 17 00:00:00 2001
From: Joshua Sangmeister <joshua.sangmeister@gmail.com>
Date: Thu, 8 Apr 2021 11:33:26 +0200
Subject: [PATCH] Add migrations to remove duplicates from existing polls

---
 ...ntpoll_entitled_users_remove_duplicates.py | 18 +++++++++++++++
 ...onpoll_entitled_users_remove_duplicates.py | 16 ++++++++++++++
 .../poll/migrations/poll_migration_helper.py  | 22 +++++++++++++++++++
 3 files changed, 56 insertions(+)
 create mode 100644 server/openslides/assignments/migrations/0024_assignmentpoll_entitled_users_remove_duplicates.py
 create mode 100644 server/openslides/motions/migrations/0043_motionpoll_entitled_users_remove_duplicates.py

diff --git a/server/openslides/assignments/migrations/0024_assignmentpoll_entitled_users_remove_duplicates.py b/server/openslides/assignments/migrations/0024_assignmentpoll_entitled_users_remove_duplicates.py
new file mode 100644
index 000000000..79ef5d5a6
--- /dev/null
+++ b/server/openslides/assignments/migrations/0024_assignmentpoll_entitled_users_remove_duplicates.py
@@ -0,0 +1,18 @@
+# Generated by jsangmeister on 2021-04-08 11:27
+
+from django.db import migrations
+
+from ...poll.migrations.poll_migration_helper import remove_entitled_users_duplicates
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("assignments", "0023_assignmentpoll_change_fields_2"),
+    ]
+
+    operations = [
+        migrations.RunPython(
+            remove_entitled_users_duplicates("assignments", "AssignmentPoll")
+        ),
+    ]
diff --git a/server/openslides/motions/migrations/0043_motionpoll_entitled_users_remove_duplicates.py b/server/openslides/motions/migrations/0043_motionpoll_entitled_users_remove_duplicates.py
new file mode 100644
index 000000000..19d0a93a8
--- /dev/null
+++ b/server/openslides/motions/migrations/0043_motionpoll_entitled_users_remove_duplicates.py
@@ -0,0 +1,16 @@
+# Generated by jsangmeister on 2021-04-08 11:27
+
+from django.db import migrations
+
+from ...poll.migrations.poll_migration_helper import remove_entitled_users_duplicates
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("motions", "0042_motionpoll_change_fields_2"),
+    ]
+
+    operations = [
+        migrations.RunPython(remove_entitled_users_duplicates("motions", "MotionPoll")),
+    ]
diff --git a/server/openslides/poll/migrations/poll_migration_helper.py b/server/openslides/poll/migrations/poll_migration_helper.py
index 3e6478ad3..27b9414b3 100644
--- a/server/openslides/poll/migrations/poll_migration_helper.py
+++ b/server/openslides/poll/migrations/poll_migration_helper.py
@@ -34,3 +34,25 @@ def calculate_vote_fields(poll_model_collection, poll_model_name):
                 poll.save(skip_autoupdate=True)
 
     return _calculate_vote_fields
+
+
+def remove_entitled_users_duplicates(poll_model_collection, poll_model_name):
+    """
+    Takes all polls of the given model and removes any duplicate entries from
+    entitled_users_at_stop
+    """
+
+    def _remove_entitled_users_duplicates(apps, schema_editor):
+        PollModel = apps.get_model(poll_model_collection, poll_model_name)
+        for poll in PollModel.objects.all():
+            if poll.entitled_users_at_stop:
+                new_entitled_users = []
+                entitled_users_ids = set()
+                for entry in poll.entitled_users_at_stop:
+                    if entry["user_id"] not in entitled_users_ids:
+                        entitled_users_ids.add(entry["user_id"])
+                        new_entitled_users.append(entry)
+                poll.entitled_users_at_stop = new_entitled_users
+                poll.save(skip_autoupdate=True)
+
+    return _remove_entitled_users_duplicates