flows: FlowStageBinding: rename .flow to .target to fix select_subclasses()

passbook/flows/migrations/0007_auto_20200703_2059.py

@@ -0,0 +1,42 @@
+# Generated by Django 3.0.7 on 2020-07-03 20:59
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("passbook_policies", "0002_auto_20200528_1647"),
+        ("passbook_flows", "0006_auto_20200629_0857"),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name="flowstagebinding",
+            options={
+                "ordering": ["order", "target"],
+                "verbose_name": "Flow Stage Binding",
+                "verbose_name_plural": "Flow Stage Bindings",
+            },
+        ),
+        migrations.RenameField(
+            model_name="flowstagebinding", old_name="flow", new_name="target",
+        ),
+        migrations.RenameField(
+            model_name="flow", old_name="pbm", new_name="policybindingmodel_ptr",
+        ),
+        migrations.AlterUniqueTogether(
+            name="flowstagebinding", unique_together={("target", "stage", "order")},
+        ),
+        migrations.AlterField(
+            model_name="flow",
+            name="policybindingmodel_ptr",
+            field=models.OneToOneField(
+                auto_created=True,
+                on_delete=django.db.models.deletion.CASCADE,
+                parent_link=True,
+                to="passbook_policies.PolicyBindingModel",
+            ),
+        ),
+    ]