Fixed a serialization problem with objects that have a foreign key on an object whose primary key is a OneToOneField.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@5371 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/serializers/python.py

@@ -37,7 +37,12 @@ class Serializer(base.Serializer):
     def handle_fk_field(self, obj, field):
         related = getattr(obj, field.name)
         if related is not None:
-            related = getattr(related, field.rel.field_name)
+            if field.rel.field_name == related._meta.pk.name:
+                # Related to remote object via primary key
+                related = related._get_pk_val()
+            else:
+                # Related to remote object via other field
+                related = getattr(related, field.rel.field_name)
         self._current[field.name] = related
     
     def handle_m2m_field(self, obj, field):

django/core/serializers/xml_serializer.py

@@ -82,7 +82,13 @@ class Serializer(base.Serializer):
         self._start_relational_field(field)
         related = getattr(obj, field.name)
         if related is not None:
-            self.xml.characters(str(getattr(related, field.rel.field_name)))
+            if field.rel.field_name == related._meta.pk.name:
+                # Related to remote object via primary key
+                related = related._get_pk_val()
+            else:
+                # Related to remote object via other field
+                related = getattr(related, field.rel.field_name)
+            self.xml.characters(str(related))
         else:
             self.xml.addQuickElement("None")
         self.xml.endElement("field")

tests/regressiontests/serializers_regress/models.py

@@ -129,6 +129,9 @@ class M2MSelfData(models.Model):
 class FKDataToField(models.Model):
     data = models.ForeignKey(UniqueAnchor, null=True, to_field='data')
 
+class FKDataToO2O(models.Model):
+    data = models.ForeignKey(O2OData, null=True)
+
 # The following test classes are for validating the
 # deserialization of objects that use a user-defined
 # field as the primary key.

tests/regressiontests/serializers_regress/tests.py

@@ -197,6 +197,8 @@ The end."""),
     (fk_obj, 451, FKDataToField, "UAnchor 2"),
     (fk_obj, 452, FKDataToField, None),
 
+    (fk_obj, 460, FKDataToO2O, 300),
+
     (data_obj, 500, Anchor, "Anchor 3"),
     (data_obj, 501, Anchor, "Anchor 4"),
     (data_obj, 502, UniqueAnchor, "UAnchor 2"),