Divide migration file

backend/api/migrations/0024_auto_20211221_1444.py

@@ -28,8 +28,5 @@ class Migration(migrations.Migration):
             model_name='span',
             name='label',
             field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='api.spantype'),
-        ),
-        migrations.DeleteModel(
-            name='Label',
-        ),
+        )
     ]

backend/api/migrations/0025_auto_20220107_0158.py

@@ -0,0 +1,37 @@
+# Generated by Django 3.2.8 on 2022-01-07 01:58
+
+from django.db import migrations
+
+
+def recover_label(apps, schema_editor):
+    DocType = apps.get_model('api', 'DocType')
+    SpanType = apps.get_model('api', 'SpanType')
+    Label = apps.get_model('api', 'Label')
+    for model in [DocType, SpanType]:
+        for label in model.objects.all():
+            old_label = Label(
+                id=label.id,
+                text=label.text,
+                prefix_key=label.prefix_key,
+                suffix_key=label.suffix_key,
+                project=label.project,
+                background_color=label.background_color,
+                text_color=label.text_color,
+                created_at=label.created_at,
+                updated_at=label.updated_at
+            )
+            old_label.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('api', '0024_auto_20211221_1444'),
+    ]
+
+    operations = [
+        migrations.RunPython(
+            code=migrations.RunPython.noop,
+            reverse_code=recover_label
+        )
+    ]

backend/api/migrations/0026_auto_20220107_0200.py

@@ -0,0 +1,16 @@
+# Generated by Django 3.2.8 on 2022-01-07 02:00
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('api', '0025_auto_20220107_0158'),
+    ]
+
+    operations = [
+        migrations.DeleteModel(
+            name='Label',
+        ),
+    ]

backend/api/migrations/0025_auto_20211222_0454.py → backend/api/migrations/0027_auto_20211222_0454.py

@@ -7,7 +7,7 @@ import django.db.models.deletion
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('api', '0024_auto_20211221_1444'),
+        ('api', '0026_auto_20220107_0200'),
     ]
 
     operations = [