Fix unique constraint on personal notes

(cherry picked from commit d193a0e8)

CHANGELOG.rst

@@ -18,6 +18,7 @@ Fixed
 ~~~~~
 
 * Fix problems with displaying dates for events in the week and lesson view.
+* Unique constraint on lesson documentations and personal notes did not work and caused racey duplicates.
 
 `2.0rc5`_ - 2021-08-12
 ----------------------
@@ -27,7 +28,6 @@ Fixed
 
 * The _Delete personal note_ action didn't work due to wrong usage of ``bulk_update``.
 * Groups and persons were shown multiple times in some forms due to filtering by permissions.
-* Unique constraint on lesson documentations did not work and caused racey duplicates.
 
 `2.0rc4`_ - 2021-08-01
 ----------------------

aleksis/apps/alsijil/migrations/0015_fix_unique_personal_note.py

+# Generated by Django 3.2.4 on 2021-08-29 13:31
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('alsijil', '0014_fix_unique_lesson_documentation'),
+    ]
+
+    operations = [
+        migrations.RemoveConstraint(
+            model_name='personalnote',
+            name='unique_personal_note_per_object',
+        ),
+        migrations.AddConstraint(
+            model_name='personalnote',
+            constraint=models.UniqueConstraint(fields=('week', 'year', 'lesson_period', 'person'), name='unique_note_per_lp'),
+        ),
+        migrations.AddConstraint(
+            model_name='personalnote',
+            constraint=models.UniqueConstraint(fields=('week', 'year', 'event', 'person'), name='unique_note_per_ev'),
+        ),
+        migrations.AddConstraint(
+            model_name='personalnote',
+            constraint=models.UniqueConstraint(fields=('week', 'year', 'extra_lesson', 'person'), name='unique_note_per_el'),
+        ),
+    ]

aleksis/apps/alsijil/models.py

@@ -283,8 +283,13 @@ class PersonalNote(RegisterObjectRelatedMixin, ExtensibleModel):
                 check=lesson_related_constraint_q, name="one_relation_only_personal_note"
             ),
             models.UniqueConstraint(
-                fields=("lesson_period", "week", "year", "event", "extra_lesson"),
-                name="unique_personal_note_per_object",
+                fields=("week", "year", "lesson_period", "person"), name="unique_note_per_lp",
+            ),
+            models.UniqueConstraint(
+                fields=("week", "year", "event", "person"), name="unique_note_per_ev",
+            ),
+            models.UniqueConstraint(
+                fields=("week", "year", "extra_lesson", "person"), name="unique_note_per_el",
             ),
         ]
 
@@ -373,16 +378,13 @@ class LessonDocumentation(RegisterObjectRelatedMixin, ExtensibleModel):
                 check=lesson_related_constraint_q, name="one_relation_only_lesson_documentation",
             ),
             models.UniqueConstraint(
-                fields=("week", "year", "lesson_period"),
-                name="unique_documentation_per_lp",
+                fields=("week", "year", "lesson_period"), name="unique_documentation_per_lp",
             ),
             models.UniqueConstraint(
-                fields=("week", "year", "event"),
-                name="unique_documentation_per_ev",
+                fields=("week", "year", "event"), name="unique_documentation_per_ev",
             ),
             models.UniqueConstraint(
-                fields=("week", "year", "extra_lesson"),
-                name="unique_documentation_per_el",
+                fields=("week", "year", "extra_lesson"), name="unique_documentation_per_el",
             ),
         ]