Added NonSortableCategory and SortableCategoryWidget model classes.

Wired up NonSortableCategory and inline sortable SortableCategoryWidget to sample project admin.

sample_project/app/admin.py

@@ -1,10 +1,11 @@
 from django.contrib import admin
 
 from adminsortable.admin import (SortableAdmin, SortableTabularInline,
-    SortableStackedInline, SortableGenericStackedInline)
+    SortableStackedInline, SortableGenericStackedInline,
+    NonSortableParentAdmin)
 from adminsortable.utils import get_is_sortable
 from app.models import (Category, Widget, Project, Credit, Note, GenericNote,
-    Component, Person)
+    Component, Person, NonSortableCategory, SortableCategoryWidget)
 
 
 admin.site.register(Category, SortableAdmin)
@@ -65,3 +66,14 @@ class PersonAdmin(SortableAdmin):
     list_display = ['__unicode__', 'is_board_member']
 
 admin.site.register(Person, PersonAdmin)
+
+
+class SortableCategoryWidgetInline(SortableStackedInline):
+    model = SortableCategoryWidget
+    extra = 0
+
+
+class NonSortableCategoryAdmin(NonSortableParentAdmin):
+    inlines = [SortableCategoryWidgetInline]
+
+admin.site.register(NonSortableCategory, NonSortableCategoryAdmin)

sample_project/app/models.py

@@ -116,3 +116,17 @@ class Person(Sortable):
 
     def __unicode__(self):
         return '{0} {1}'.format(self.first_name, self.last_name)
+
+
+class NonSortableCategory(SimpleModel):
+    class Meta(SimpleModel.Meta):
+        verbose_name = 'Non-Sortable Category'
+        verbose_name_plural = 'Non-Sortable Categories'
+
+
+class SortableCategoryWidget(SimpleModel, Sortable):
+    class Meta(Sortable.Meta):
+        verbose_name = 'Sortable Category Widget'
+        verbose_name_plural = 'Sortable Category Widgets'
+
+    non_sortable_category = SortableForeignKey(NonSortableCategory)