From ca33f07e2c555c16b60ae287ffa994c7a3d6c1c9 Mon Sep 17 00:00:00 2001
From: Karen Tracey <kmtracey@gmail.com>
Date: Sun, 21 Dec 2008 04:56:32 +0000
Subject: [PATCH] Fixed #9865 -- Allow saving of new inline-edited objects with
 custom non-auto primary key fields that are not the foreign key to the parent
 object.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@9664 bcc190cf-cafb-0310-a4f2-bffc1f526a37
---
 django/forms/models.py                    |  9 ++++--
 tests/modeltests/model_formsets/models.py | 36 +++++++++++++++++++++++
 2 files changed, 43 insertions(+), 2 deletions(-)

diff --git a/django/forms/models.py b/django/forms/models.py
index 81a7439331..d8c038faad 100644
--- a/django/forms/models.py
+++ b/django/forms/models.py
@@ -482,9 +482,14 @@ class BaseInlineFormSet(BaseModelFormSet):
         return form
     
     def save_new(self, form, commit=True):
-        kwargs = {self.fk.get_attname(): self.instance.pk}
+        fk_attname = self.fk.get_attname()
+        kwargs = {fk_attname: self.instance.pk}
         new_obj = self.model(**kwargs)
-        return save_instance(form, new_obj, exclude=[self._pk_field.name], commit=commit)
+        if fk_attname == self._pk_field.attname:
+            exclude =  [self._pk_field.name]
+        else:
+            exclude = []
+        return save_instance(form, new_obj, exclude=exclude, commit=commit)
 
     def add_fields(self, form, index):
         super(BaseInlineFormSet, self).add_fields(form, index)
diff --git a/tests/modeltests/model_formsets/models.py b/tests/modeltests/model_formsets/models.py
index 8e28e6fccd..f11d4538ef 100644
--- a/tests/modeltests/model_formsets/models.py
+++ b/tests/modeltests/model_formsets/models.py
@@ -27,7 +27,15 @@ class Book(models.Model):
 
     def __unicode__(self):
         return self.title
+    
+class BookWithCustomPK(models.Model):
+    my_pk = models.DecimalField(max_digits=5, decimal_places=0, primary_key=True)
+    author = models.ForeignKey(Author)
+    title = models.CharField(max_length=100)
 
+    def __unicode__(self):
+        return u'%s: %s' % (self.my_pk, self.title)
+    
 class AuthorMeeting(models.Model):
     name = models.CharField(max_length=100)
     authors = models.ManyToManyField(Author)
@@ -484,6 +492,34 @@ Test using a custom prefix on an inline formset.
 <p><label for="id_test-0-title">Title:</label> <input id="id_test-0-title" type="text" name="test-0-title" maxlength="100" /><input type="hidden" name="test-0-author" id="id_test-0-author" /><input type="hidden" name="test-0-id" id="id_test-0-id" /></p>
 <p><label for="id_test-1-title">Title:</label> <input id="id_test-1-title" type="text" name="test-1-title" maxlength="100" /><input type="hidden" name="test-1-author" id="id_test-1-author" /><input type="hidden" name="test-1-id" id="id_test-1-id" /></p>
 
+Test inline formsets where the inline-edited object has a custom primary key that is not the fk to the parent object.
+
+>>> AuthorBooksFormSet2 = inlineformset_factory(Author, BookWithCustomPK, can_delete=False, extra=1)
+
+>>> formset = AuthorBooksFormSet2(instance=author)
+>>> for form in formset.forms:
+...     print form.as_p()
+<p><label for="id_bookwithcustompk_set-0-my_pk">My pk:</label> <input type="text" name="bookwithcustompk_set-0-my_pk" id="id_bookwithcustompk_set-0-my_pk" /></p>
+    <p><label for="id_bookwithcustompk_set-0-title">Title:</label> <input id="id_bookwithcustompk_set-0-title" type="text" name="bookwithcustompk_set-0-title" maxlength="100" /><input type="hidden" name="bookwithcustompk_set-0-author" value="1" id="id_bookwithcustompk_set-0-author" /></p>
+
+>>> data = {
+...     'bookwithcustompk_set-TOTAL_FORMS': '1', # the number of forms rendered
+...     'bookwithcustompk_set-INITIAL_FORMS': '0', # the number of forms with initial data
+...     'bookwithcustompk_set-0-my_pk': '77777',
+...     'bookwithcustompk_set-0-title': 'Les Fleurs du Mal',
+... }
+
+>>> formset = AuthorBooksFormSet2(data, instance=author)
+>>> formset.is_valid()
+True
+
+>>> formset.save()
+[<BookWithCustomPK: 77777: Les Fleurs du Mal>]
+
+>>> for book in author.bookwithcustompk_set.all():
+...     print book.title
+Les Fleurs du Mal
+
 # Test a custom primary key ###################################################
 
 We need to ensure that it is displayed