fix: migration 加唯一约束前自动去重，补充部署清理脚本

config/migrations/0006_display_club_id.py

@@ -1,4 +1,23 @@
 from django.db import migrations, models
+from django.db.models import Max
+
+
+def _dedupe_popuppage(apps, schema_editor):
+    PopupPage = apps.get_model('config', 'PopupPage')
+    for row in PopupPage.objects.values('club_id', 'page_key').annotate(max_id=Max('id')):
+        PopupPage.objects.filter(
+            club_id=row['club_id'],
+            page_key=row['page_key'],
+        ).exclude(id=row['max_id']).delete()
+
+
+def _dedupe_tupianpeizhi(apps, schema_editor):
+    Tupianpeizhi = apps.get_model('config', 'Tupianpeizhi')
+    for row in Tupianpeizhi.objects.values('club_id', 'ImageType').annotate(max_id=Max('id')):
+        Tupianpeizhi.objects.filter(
+            club_id=row['club_id'],
+            ImageType=row['ImageType'],
+        ).exclude(id=row['max_id']).delete()
 
 
 class Migration(migrations.Migration):
@@ -45,10 +64,12 @@ class Migration(migrations.Migration):
             name='page_key',
             field=models.CharField(db_index=True, max_length=50, verbose_name='页面标识'),
         ),
+        migrations.RunPython(_dedupe_popuppage, migrations.RunPython.noop),
         migrations.AlterUniqueTogether(
             name='popuppage',
             unique_together={('club_id', 'page_key')},
         ),
+        migrations.RunPython(_dedupe_tupianpeizhi, migrations.RunPython.noop),
         migrations.AlterUniqueTogether(
             name='tupianpeizhi',
             unique_together={('club_id', 'ImageType')},