Convert IETF111 Constraints

- Legacy-Id: 19285

ietf/meeting/migrations/0044_again_assign_correct_constraintnames.py

@@ -0,0 +1,47 @@
+# Generated by Django 2.2.20 on 2021-05-13 07:51
+
+from django.db import migrations
+
+
+replacement_slugs = (
+    ('conflict', 'chair_conflict'),
+    ('conflic2', 'tech_overlap'),
+    ('conflic3', 'key_participant'),
+)
+
+
+def affected(constraint_qs):
+    """Filter constraints, keeping only those to be updated"""
+    # The constraints were renamed in the UI in commit 16699 on 2019-09-03.
+    # This was between meetings 105 and 106. Assuming this migration and
+    # the new conflict types are in place before meeting 111, these
+    # are the meetings for which the UI disagreed with the constraint
+    # type actually created.
+    affected_meetings = ['111']
+    return constraint_qs.filter(meeting__number__in=affected_meetings)
+
+
+def forward(apps, schema_editor):
+    Constraint = apps.get_model('meeting', 'Constraint')
+    affected_constraints = affected(Constraint.objects.all())
+    for old, new in replacement_slugs:
+        affected_constraints.filter(name_id=old).update(name_id=new)
+
+
+def reverse(apps, schema_editor):
+    Constraint = apps.get_model('meeting', 'Constraint')
+    affected_constraints = affected(Constraint.objects.all())
+    for old, new in replacement_slugs:
+        affected_constraints.filter(name_id=new).update(name_id=old)
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('meeting', '0043_populate_meeting_group_conflict_types'),
+        ('name', '0027_add_bofrequest'),
+    ]
+
+    operations = [
+        migrations.RunPython(forward, reverse),
+    ]