Set inline label number in django admin 1.9+. fixes #79

nested_admin/static/nested_admin/src/nested-admin/sortable.js

@@ -5,7 +5,8 @@ import regexQuote from './regexquote';
 import './jquery.ui.nestedsortable';
 
 export function updatePositions(prefix) {
-    var position = 0,
+    var position = 0,  // the value of the position formfield
+        count = 1,     // The count displayed in stacked inline headers
         $group = $('#' + prefix + '-group'),
         groupData = $group.djnData(),
         fieldNames = groupData.fieldNames,
@@ -48,6 +49,11 @@ export function updatePositions(prefix) {
             return;
         }
 
+        // Set header position for stacked inlines in Django 1.9+
+        var $inlineLabel = $this.find('> h3 > .inline_label');
+        $inlineLabel.html($inlineLabel.html().replace(/(#\d+)/g, '#' + count));
+        count++;
+
         var $fields = $this.djangoFormField('*'),
             $positionField,
             setPosition = false;

nested_admin/tests/two_deep/tests.py

@@ -1,5 +1,5 @@
 import time
-from unittest import skipIf
+from unittest import skipIf, SkipTest
 
 import django
 
@@ -778,6 +778,30 @@ class TestStackedInlineAdmin(InlineAdminTestCaseMixin, BaseNestedAdminTestCase):
     root_model = StackedGroup
     nested_models = (StackedSection, StackedItem)
 
+    def test_add_item_inline_label_update(self):
+        if django.VERSION < (1, 9):
+            raise SkipTest("Test only applies to Django 1.9+")
+        if self.has_grappelli:
+            raise SkipTest("Test does not apply if using django-grappelli")
+        if self.has_suit:
+            raise SkipTest("Test does not apply if using django-suit")
+        group = self.root_model.objects.create(slug='test')
+        self.section_cls.objects.create(slug='test', group=group, position=0)
+
+        self.load_admin(group)
+        item_verbose_name = self.item_cls._meta.verbose_name.title()
+        with self.clickable_xpath('//a[contains(string(.), "Add another %s")]' % item_verbose_name) as el:
+            el.click()
+        with self.clickable_xpath('//input[@name="section_set-0-item_set-0-name"]') as el:
+            el.send_keys("Test 1")
+        with self.clickable_xpath('//a[contains(string(.), "Add another %s")]' % item_verbose_name) as el:
+            el.click()
+        with self.clickable_xpath('//input[@name="section_set-0-item_set-0-name"]') as el:
+            el.send_keys("Test 2")
+
+        inline_label = self.get_item([0, 1]).find_element_by_class_name('inline_label')
+        self.assertEqual(inline_label.text, '#2')
+
 
 class TestTabularInlineAdmin(InlineAdminTestCaseMixin, BaseNestedAdminTestCase):