Fixed #23733 -- Fixed squashing migrations that depend on multiple apps.

tests/migrations/test_migrations_squashed_complex_multi_apps/app1/1_auto.py

@@ -0,0 +1,11 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    operations = [
+        migrations.RunPython(lambda apps, schema_editor: None)
+    ]

tests/migrations/test_migrations_squashed_complex_multi_apps/app1/2_auto.py

@@ -0,0 +1,13 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [("app1", "1_auto")]
+
+    operations = [
+        migrations.RunPython(lambda apps, schema_editor: None)
+    ]

tests/migrations/test_migrations_squashed_complex_multi_apps/app1/2_squashed_3.py

@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    replaces = [
+        ("app1", "2_auto"),
+        ("app1", "3_auto"),
+    ]
+
+    dependencies = [("app1", "1_auto"), ("app2", "2_auto")]
+
+    operations = [
+        migrations.RunPython(lambda apps, schema_editor: None)
+    ]

tests/migrations/test_migrations_squashed_complex_multi_apps/app1/3_auto.py

@@ -0,0 +1,13 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [("app1", "2_auto"), ("app2", "2_auto")]
+
+    operations = [
+        migrations.RunPython(lambda apps, schema_editor: None)
+    ]

tests/migrations/test_migrations_squashed_complex_multi_apps/app1/4_auto.py

@@ -0,0 +1,13 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [("app1", "3_auto")]
+
+    operations = [
+        migrations.RunPython(lambda apps, schema_editor: None)
+    ]

tests/migrations/test_migrations_squashed_complex_multi_apps/app2/1_auto.py

@@ -0,0 +1,13 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [("app1", "1_auto")]
+
+    operations = [
+        migrations.RunPython(lambda apps, schema_editor: None)
+    ]

tests/migrations/test_migrations_squashed_complex_multi_apps/app2/1_squashed_2.py

@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    replaces = [
+        ("app2", "1_auto"),
+        ("app2", "2_auto"),
+    ]
+
+    dependencies = [("app1", "1_auto")]
+
+    operations = [
+        migrations.RunPython(lambda apps, schema_editor: None)
+    ]

tests/migrations/test_migrations_squashed_complex_multi_apps/app2/2_auto.py

@@ -0,0 +1,13 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [("app2", "1_auto")]
+
+    operations = [
+        migrations.RunPython(lambda apps, schema_editor: None)
+    ]