Resolve "Fields must be unique per site"

Closes #163 (closed)

aleksis/apps/alsijil/migrations/0013_fix_uniqueness_per_site.py

+# Generated by Django 3.2.3 on 2021-05-23 12:32
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('alsijil', '0012_unique_relation'),
+    ]
+
+    operations = [
+        migrations.AlterUniqueTogether(
+            name='lessondocumentation',
+            unique_together=set(),
+        ),
+        migrations.AlterUniqueTogether(
+            name='personalnote',
+            unique_together=set(),
+        ),
+        migrations.AddConstraint(
+            model_name='excusetype',
+            constraint=models.UniqueConstraint(fields=('site_id', 'short_name'), name='unique_excuse_short_name'),
+        ),
+        migrations.AddConstraint(
+            model_name='excusetype',
+            constraint=models.UniqueConstraint(fields=('site_id', 'name'), name='unique_excuse_name'),
+        ),
+        migrations.AddConstraint(
+            model_name='extramark',
+            constraint=models.UniqueConstraint(fields=('site_id', 'short_name'), name='unique_mark_short_name'),
+        ),
+        migrations.AddConstraint(
+            model_name='extramark',
+            constraint=models.UniqueConstraint(fields=('site_id', 'name'), name='unique_mark_name'),
+        ),
+        migrations.AddConstraint(
+            model_name='grouprole',
+            constraint=models.UniqueConstraint(fields=('site_id', 'name'), name='unique_role_per_site'),
+        ),
+        migrations.AddConstraint(
+            model_name='lessondocumentation',
+            constraint=models.UniqueConstraint(fields=('lesson_period', 'week', 'year', 'event', 'extra_lesson'), name='unique_documentation_per_object'),
+        ),
+        migrations.AddConstraint(
+            model_name='personalnote',
+            constraint=models.UniqueConstraint(fields=('lesson_period', 'week', 'year', 'event', 'extra_lesson'), name='unique_personal_note_per_object'),
+        ),
+    ]