Nested operations functions

tests/app/tests/migrations/xxx/0001_initial.py

@@ -0,0 +1,44 @@
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ("app3", "0001_inital"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="TranscodeJob",
+            fields=[
+                ("id", models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name="ID")),
+                ("created_at", models.DateTimeField(auto_now_add=True, db_index=True)),
+                ("updated_at", models.DateTimeField(auto_now=True)),
+                ("job_id", models.CharField(max_length=50, unique=True)),
+                (
+                    "status",
+                    models.CharField(
+                        choices=[
+                            ("S", "Submitted"),
+                            ("P", "Progressing"),
+                            ("C", "Complete"),
+                            ("X", "Canceled"),
+                            ("E", "Error"),
+                            ("U", "Unknown"),
+                        ],
+                        default="S",
+                        max_length=1,
+                    ),
+                ),
+                ("initial_response_data", models.TextField()),
+                ("final_response_data", models.TextField()),
+                ("video", models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, to="app3.Person")),
+            ],
+            options={
+                "abstract": False,
+            },
+        ),
+    ]

tests/app/tests/migrations/xxx/0002_auto.py

@@ -0,0 +1,58 @@
+import django.contrib.contenttypes.models
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("app", "0001_initial"),
+    ]
+
+    def forwards_func(apps, schema_editor):
+        return
+
+    operations = [
+        migrations.AddField(
+            model_name="transcodejob",
+            name="content_type",
+            field=models.IntegerField(null=True, verbose_name=django.contrib.contenttypes.models.ContentType),
+        ),
+        migrations.AddField(
+            model_name="transcodejob",
+            name="object_id",
+            field=models.BigIntegerField(null=True),
+        ),
+        migrations.AlterField(
+            model_name="transcodejob",
+            name="job_id",
+            field=models.CharField(max_length=50, null=True, unique=True),
+        ),
+        migrations.AlterField(
+            model_name="transcodejob",
+            name="status",
+            field=models.CharField(
+                choices=[
+                    ("R", "Ready"),
+                    ("S", "Submitted"),
+                    ("P", "Progressing"),
+                    ("C", "Complete"),
+                    ("X", "Canceled"),
+                    ("E", "Error"),
+                    ("U", "Unknown"),
+                ],
+                default="S",
+                max_length=1,
+            ),
+        ),
+        migrations.AlterField(
+            model_name="transcodejob",
+            name="video",
+            field=models.OneToOneField(null=True, on_delete=django.db.models.deletion.CASCADE, to="app3.Person"),
+        ),
+        migrations.AlterIndexTogether(
+            name="transcodejob",
+            index_together=set([("content_type", "object_id")]),
+        ),
+        migrations.RunPython(forwards_func, reverse_code=migrations.RunPython.noop),
+    ]

tests/test_migrations.py

@@ -593,6 +593,47 @@ class Migration(migrations.Migration):
     assert migration_app_dir.migration_read("0003_squashed.py", "") == expected
 
 
+@pytest.mark.temporary_migration_module(module="app.tests.migrations.xxx", app_label="app")
+@pytest.mark.temporary_migration_module2(module="app3.tests.migrations.moved", app_label="app3")
+def test_nested(migration_app_dir, migration_app2_dir, call_squash_migrations, settings):
+    from django.contrib.contenttypes.fields import GenericForeignKey
+    from django.contrib.contenttypes.models import ContentType
+
+    class TranscodeJob(models.Model):
+
+        STATUS_CHOICES = (
+            ("R", "Ready"),
+            ("S", "Submitted"),
+            ("P", "Progressing"),
+            ("C", "Complete"),
+            ("X", "Canceled"),
+            ("E", "Error"),
+            ("U", "Unknown"),
+        )
+
+        content_type = models.IntegerField(ContentType, null=True)
+        object_id = models.BigIntegerField(null=True)
+        content_object = GenericForeignKey("content_type", "object_id")
+
+        video = models.OneToOneField("app3.Person", on_delete=models.CASCADE, null=True)
+        job_id = models.CharField(max_length=50, unique=True, null=True)
+        status = models.CharField(max_length=1, choices=STATUS_CHOICES, default="S")
+        initial_response_data = models.TextField()
+        final_response_data = models.TextField()
+
+        class Meta:
+            app_label = "app"
+
+    class Person(models.Model):
+        name = models.CharField(max_length=10)
+        dob = models.DateField()
+
+        class Meta:
+            app_label = "app3"
+
+    call_squash_migrations()
+
+
 @pytest.mark.temporary_migration_module(module="app.tests.migrations.pg_indexes", app_label="app")
 def test_squashing_migration_pg_indexes(migration_app_dir, call_squash_migrations):