Fixed #10922 -- Corrected handling of POST data to ensure that the right objects are updated on save when the ordering field is editable. Thanks to Alex Gaynor, Karen Tracy, and Will Hardy for their contributions to this patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@11160 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/forms/models.py

@@ -464,8 +464,21 @@ class BaseModelFormSet(BaseFormSet):
             return len(self.get_queryset())
         return super(BaseModelFormSet, self).initial_form_count()
 
+    def _existing_object(self, pk):
+        if not hasattr(self, '_object_dict'):
+            self._object_dict = dict([(o.pk, o) for o in self.get_queryset()])
+        return self._object_dict.get(pk)
+
     def _construct_form(self, i, **kwargs):
-        if i < self.initial_form_count():
+        if self.is_bound and i < self.initial_form_count():
+            pk_key = "%s-%s" % (self.add_prefix(i), self.model._meta.pk.name)
+            pk = self.data[pk_key]
+            pk_field = self.model._meta.pk
+            pk = pk_field.get_db_prep_lookup('exact', pk)
+            if isinstance(pk, list):
+                pk = pk[0]
+            kwargs['instance'] = self._existing_object(pk)
+        if i < self.initial_form_count() and not kwargs.get('instance'):
             kwargs['instance'] = self.get_queryset()[i]
         return super(BaseModelFormSet, self)._construct_form(i, **kwargs)
 
@@ -604,10 +617,6 @@ class BaseModelFormSet(BaseFormSet):
         if not self.get_queryset():
             return []
 
-        # Put the objects from self.get_queryset into a dict so they are easy to lookup by pk
-        existing_objects = {}
-        for obj in self.get_queryset():
-            existing_objects[obj.pk] = obj
         saved_instances = []
         for form in self.initial_forms:
             pk_name = self._pk_field.name
@@ -618,7 +627,7 @@ class BaseModelFormSet(BaseFormSet):
             pk_value = form.fields[pk_name].clean(raw_pk_value)
             pk_value = getattr(pk_value, 'pk', pk_value)
 
-            obj = existing_objects[pk_value]
+            obj = self._existing_object(pk_value)
             if self.can_delete:
                 raw_delete_value = form._raw_value(DELETION_FIELD_NAME)
                 should_delete = form.fields[DELETION_FIELD_NAME].clean(raw_delete_value)
@@ -663,6 +672,9 @@ class BaseModelFormSet(BaseFormSet):
             return ((not pk.editable) or (pk.auto_created or isinstance(pk, AutoField))
                 or (pk.rel and pk.rel.parent_link and pk_is_not_editable(pk.rel.to._meta.pk)))
         if pk_is_not_editable(pk) or pk.name not in form.fields:
+            if form.is_bound:
+                pk_value = form.instance.pk
+            else:
                 try:
                     pk_value = self.get_queryset()[index].pk
                 except IndexError:

tests/regressiontests/admin_views/models.py

@@ -326,7 +326,6 @@ class GalleryAdmin(admin.ModelAdmin):
 class PictureAdmin(admin.ModelAdmin):
     pass
 
-
 class Language(models.Model):
     iso = models.CharField(max_length=5, primary_key=True)
     name = models.CharField(max_length=50)
@@ -401,8 +400,25 @@ class WhatsitInline(admin.StackedInline):
 class FancyDoodadInline(admin.StackedInline):
     model = FancyDoodad
 
+class Category(models.Model):
+    collector = models.ForeignKey(Collector)
+    order = models.PositiveIntegerField()
+
+    class Meta:
+        ordering = ('order',)
+
+    def __unicode__(self):
+        return u'%s:o%s' % (self.id, self.order)
+
+class CategoryAdmin(admin.ModelAdmin):
+    list_display = ('id', 'collector', 'order')
+    list_editable = ('order',)
+
+class CategoryInline(admin.StackedInline):
+    model = Category
+
 class CollectorAdmin(admin.ModelAdmin):
-    inlines = [WidgetInline, DooHickeyInline, GrommetInline, WhatsitInline, FancyDoodadInline]
+    inlines = [WidgetInline, DooHickeyInline, GrommetInline, WhatsitInline, FancyDoodadInline, CategoryInline]
 
 admin.site.register(Article, ArticleAdmin)
 admin.site.register(CustomArticle, CustomArticleAdmin)
@@ -426,6 +442,7 @@ admin.site.register(Language, LanguageAdmin)
 admin.site.register(Recommendation, RecommendationAdmin)
 admin.site.register(Recommender)
 admin.site.register(Collector, CollectorAdmin)
+admin.site.register(Category, CategoryAdmin)
 
 # We intentionally register Promo and ChapterXtra1 but not Chapter nor ChapterXtra2.
 # That way we cover all four cases:

tests/regressiontests/admin_views/tests.py

@@ -16,7 +16,8 @@ from django.utils.html import escape
 from models import Article, BarAccount, CustomArticle, EmptyModel, \
     ExternalSubscriber, FooAccount, Gallery, ModelWithStringPrimaryKey, \
     Person, Persona, Picture, Podcast, Section, Subscriber, Vodcast, \
-    Language, Collector, Widget, Grommet, DooHickey, FancyDoodad, Whatsit
+    Language, Collector, Widget, Grommet, DooHickey, FancyDoodad, Whatsit, \
+    Category
 
 try:
     set
@@ -921,6 +922,45 @@ class AdminViewListEditable(TestCase):
 
         self.failUnlessEqual(Person.objects.get(name="John Mauchly").alive, False)
 
+    def test_list_editable_ordering(self):
+        collector = Collector.objects.create(id=1, name="Frederick Clegg")
+
+        Category.objects.create(id=1, order=1, collector=collector)
+        Category.objects.create(id=2, order=2, collector=collector)
+        Category.objects.create(id=3, order=0, collector=collector)
+        Category.objects.create(id=4, order=0, collector=collector)
+
+        # NB: The order values must be changed so that the items are reordered.
+        data = {
+            "form-TOTAL_FORMS": "4",
+            "form-INITIAL_FORMS": "4",
+
+            "form-0-order": "14",
+            "form-0-id": "1",
+            "form-0-collector": "1",
+
+            "form-1-order": "13",
+            "form-1-id": "2",
+            "form-1-collector": "1",
+
+            "form-2-order": "1",
+            "form-2-id": "3",
+            "form-2-collector": "1",
+
+            "form-3-order": "0",
+            "form-3-id": "4",
+            "form-3-collector": "1",
+        }
+        response = self.client.post('/test_admin/admin/admin_views/category/', data)
+        # Successful post will redirect
+        self.failUnlessEqual(response.status_code, 302)
+
+        # Check that the order values have been applied to the right objects
+        self.failUnlessEqual(Category.objects.get(id=1).order, 14)
+        self.failUnlessEqual(Category.objects.get(id=2).order, 13)
+        self.failUnlessEqual(Category.objects.get(id=3).order, 1)
+        self.failUnlessEqual(Category.objects.get(id=4).order, 0)
+
 class AdminSearchTest(TestCase):
     fixtures = ['admin-views-users','multiple-child-classes']
 
@@ -1254,11 +1294,24 @@ class AdminInlineTests(TestCase):
             "fancydoodad_set-2-owner": "1",
             "fancydoodad_set-2-name": "",
             "fancydoodad_set-2-expensive": "on",
+
+            "category_set-TOTAL_FORMS": "3",
+            "category_set-INITIAL_FORMS": "0",
+            "category_set-0-order": "",
+            "category_set-0-id": "",
+            "category_set-0-collector": "1",
+            "category_set-1-order": "",
+            "category_set-1-id": "",
+            "category_set-1-collector": "1",
+            "category_set-2-order": "",
+            "category_set-2-id": "",
+            "category_set-2-collector": "1",
         }
 
         result = self.client.login(username='super', password='secret')
         self.failUnlessEqual(result, True)
-        Collector(pk=1,name='John Fowles').save()
+        self.collector = Collector(pk=1,name='John Fowles')
+        self.collector.save()
 
     def tearDown(self):
         self.client.logout()
@@ -1419,3 +1472,58 @@ class AdminInlineTests(TestCase):
         self.failUnlessEqual(response.status_code, 302)
         self.failUnlessEqual(FancyDoodad.objects.count(), 1)
         self.failUnlessEqual(FancyDoodad.objects.all()[0].name, "Fancy Doodad 1 Updated")
+
+    def test_ordered_inline(self):
+        """Check that an inline with an editable ordering fields is
+        updated correctly. Regression for #10922"""
+        # Create some objects with an initial ordering
+        Category.objects.create(id=1, order=1, collector=self.collector)
+        Category.objects.create(id=2, order=2, collector=self.collector)
+        Category.objects.create(id=3, order=0, collector=self.collector)
+        Category.objects.create(id=4, order=0, collector=self.collector)
+
+        # NB: The order values must be changed so that the items are reordered.
+        self.post_data.update({
+            "name": "Frederick Clegg",
+
+            "category_set-TOTAL_FORMS": "7",
+            "category_set-INITIAL_FORMS": "4",
+
+            "category_set-0-order": "14",
+            "category_set-0-id": "1",
+            "category_set-0-collector": "1",
+
+            "category_set-1-order": "13",
+            "category_set-1-id": "2",
+            "category_set-1-collector": "1",
+
+            "category_set-2-order": "1",
+            "category_set-2-id": "3",
+            "category_set-2-collector": "1",
+
+            "category_set-3-order": "0",
+            "category_set-3-id": "4",
+            "category_set-3-collector": "1",
+
+            "category_set-4-order": "",
+            "category_set-4-id": "",
+            "category_set-4-collector": "1",
+
+            "category_set-5-order": "",
+            "category_set-5-id": "",
+            "category_set-5-collector": "1",
+
+            "category_set-6-order": "",
+            "category_set-6-id": "",
+            "category_set-6-collector": "1",
+        })
+        response = self.client.post('/test_admin/admin/admin_views/collector/1/', self.post_data)
+        # Successful post will redirect
+        self.failUnlessEqual(response.status_code, 302)
+
+        # Check that the order values have been applied to the right objects
+        self.failUnlessEqual(self.collector.category_set.count(), 4)
+        self.failUnlessEqual(Category.objects.get(id=1).order, 14)
+        self.failUnlessEqual(Category.objects.get(id=2).order, 13)
+        self.failUnlessEqual(Category.objects.get(id=3).order, 1)
+        self.failUnlessEqual(Category.objects.get(id=4).order, 0)