pedagogy: add script to remove all previous doubled comments

pedagogy/migrations/0002_auto_20190827_2251.py

@@ -0,0 +1,56 @@
+# -*- coding:utf-8 -*
+#
+# Copyright 2019
+# - Sli <antoine@bartuccio.fr>
+#
+# Ce fichier fait partie du site de l'Association des Étudiants de l'UTBM,
+# http://ae.utbm.fr.
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License a published by the Free Software
+# Foundation; either version 3 of the License, or (at your option) any later
+# version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, write to the Free Sofware Foundation, Inc., 59 Temple
+# Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+#
+
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+from core.models import User
+
+
+def remove_multiples_comments_from_same_user(apps, schema_editor):
+    for user in User.objects.exclude(uv_comments=None).prefetch_related("uv_comments"):
+        for uv in user.uv_comments.values("uv").distinct():
+            last = (
+                user.uv_comments.filter(uv__id=uv["uv"])
+                .order_by("-publish_date")
+                .first()
+            )
+            for comment in (
+                user.uv_comments.filter(uv__id=uv["uv"]).exclude(pk=last.pk).all()
+            ):
+                print("removing : %s" % (comment,))
+                comment.delete()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [("pedagogy", "0001_initial")]
+
+    operations = [
+        migrations.RunPython(
+            remove_multiples_comments_from_same_user,
+            reverse_code=migrations.RunPython.noop,
+        )
+    ]