feat: new management to remove duplicate records

postcards/management/commands/remove_duplicates.py

@@ -0,0 +1,31 @@
+"""The following removes duplicate Objects by their item_id field.
+This has not been strongly tested, so please be careful when running this command.
+"""
+
+
+from django.core.management.base import BaseCommand
+from django.db.models import Count
+
+from postcards.models import Object
+
+
+class Command(BaseCommand):
+    help = "Remove duplicate Objects by their item_id field."
+
+    def handle(self, *args, **options):
+        duplicates = (
+            Object.objects.values("item_id")
+            .annotate(item_count=Count("item_id"))
+            .filter(item_count__gt=1)
+        )
+        for duplicate in duplicates:
+            item_id = duplicate["item_id"]
+            Object.objects.filter(item_id=item_id).delete()
+            self.stdout.write(
+                self.style.SUCCESS(
+                    f"Successfully removed duplicate Objects with item_id: {item_id}"
+                )
+            )
+        self.stdout.write(
+            self.style.SUCCESS("Successfully removed all duplicate Objects")
+        )

postcards/migrations/0070_alter_transcription_postal_object.py

@@ -0,0 +1,25 @@
+# Generated by Django 4.2.11 on 2024-04-26 17:42
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("postcards", "0069_remove_primarysource_file"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="transcription",
+            name="postal_object",
+            field=models.ForeignKey(
+                blank=True,
+                help_text="Link a document to the transcription.",
+                null=True,
+                on_delete=django.db.models.deletion.SET_NULL,
+                related_name="transcriptions",
+                to="postcards.object",
+            ),
+        ),
+    ]