Added migrations, fixed queryset call and fixed meta inheritance for self-referential sample model.

python3_sample_project/app/admin.py

@@ -5,7 +5,8 @@ from adminsortable.admin import (SortableAdmin, SortableTabularInline,
     NonSortableParentAdmin)
 from adminsortable.utils import get_is_sortable
 from app.models import (Category, Widget, Project, Credit, Note, GenericNote,
-    Component, Person, NonSortableCategory, SortableCategoryWidget)
+    Component, Person, NonSortableCategory, SortableCategoryWidget,
+    SelfReferentialCategory)
 
 
 admin.site.register(Category, SortableAdmin)
@@ -77,3 +78,6 @@ class NonSortableCategoryAdmin(NonSortableParentAdmin):
     inlines = [SortableCategoryWidgetInline]
 
 admin.site.register(NonSortableCategory, NonSortableCategoryAdmin)
+
+
+admin.site.register(SelfReferentialCategory, SortableAdmin)

python3_sample_project/app/migrations/0003_selfreferentialcategory.py

@@ -0,0 +1,28 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+import adminsortable.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('app', '0002_nonsortablecategory_sortablecategorywidget'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='SelfReferentialCategory',
+            fields=[
+                ('id', models.AutoField(serialize=False, auto_created=True, primary_key=True, verbose_name='ID')),
+                ('order', models.PositiveIntegerField(db_index=True, editable=False, default=1)),
+                ('title', models.CharField(max_length=50)),
+                ('child', adminsortable.fields.SortableForeignKey(to='app.SelfReferentialCategory')),
+            ],
+            options={
+                'abstract': False,
+            },
+            bases=(models.Model,),
+        ),
+    ]

python3_sample_project/app/migrations/0004_auto_20141029_1612.py

@@ -0,0 +1,24 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+import adminsortable.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('app', '0003_selfreferentialcategory'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='selfreferentialcategory',
+            options={'verbose_name_plural': 'Sortable Referential Categories', 'verbose_name': 'Sortable Referential Category'},
+        ),
+        migrations.AlterField(
+            model_name='selfreferentialcategory',
+            name='child',
+            field=adminsortable.fields.SortableForeignKey(to='app.SelfReferentialCategory', null=True, blank=True),
+        ),
+    ]

python3_sample_project/app/models.py

@@ -139,3 +139,14 @@ class SortableCategoryWidget(SimpleModel, Sortable):
 
     def __str__(self):
         return self.title
+
+
+class SelfReferentialCategory(SimpleModel, Sortable):
+    class Meta(Sortable.Meta):
+        verbose_name = 'Sortable Referential Category'
+        verbose_name_plural = 'Sortable Referential Categories'
+
+    child = SortableForeignKey('self', blank=True, null=True)
+
+    def __str__(self):
+        return self.title