From 36ce5d0b3a5af8bae8282590b2a510272953958e Mon Sep 17 00:00:00 2001
From: Jannis Leidel <jannis@leidel.info>
Date: Fri, 1 Oct 2010 02:40:25 +0000
Subject: [PATCH] [1.2.X] Fixed #14363 -- Fixed render method of
 ManyToManyRawIdWidget to set attrs to an empty dict. Thanks, tyrion and dpn.

Backport from trunk (r13971).

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@13975 bcc190cf-cafb-0310-a4f2-bffc1f526a37
---
 django/contrib/admin/widgets.py               | 2 ++
 tests/regressiontests/admin_widgets/models.py | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/django/contrib/admin/widgets.py b/django/contrib/admin/widgets.py
index 5a7ad959d6..e8cbd1d03b 100644
--- a/django/contrib/admin/widgets.py
+++ b/django/contrib/admin/widgets.py
@@ -164,6 +164,8 @@ class ManyToManyRawIdWidget(ForeignKeyRawIdWidget):
     in a <select multiple> box.
     """
     def render(self, name, value, attrs=None):
+        if attrs is None:
+            attrs = {}
         attrs['class'] = 'vManyToManyRawIdAdminField'
         if value:
             value = ','.join([force_unicode(v) for v in value])
diff --git a/tests/regressiontests/admin_widgets/models.py b/tests/regressiontests/admin_widgets/models.py
index 59d625ba12..c3c824e4a8 100644
--- a/tests/regressiontests/admin_widgets/models.py
+++ b/tests/regressiontests/admin_widgets/models.py
@@ -133,6 +133,8 @@ Currently: <a target="_blank" href="%(STORAGE_URL)salbums/hybrid_theory.jpg">alb
 >>> w = ManyToManyRawIdWidget(rel)
 >>> print conditional_escape(w.render('test', [m1.pk, m2.pk], attrs={}))
 <input type="text" name="test" value="1,2" class="vManyToManyRawIdAdminField" /><a href="../../../admin_widgets/member/" class="related-lookup" id="lookup_id_test" onclick="return showRelatedObjectLookupPopup(this);"> <img src="%(ADMIN_MEDIA_PREFIX)simg/admin/selector-search.gif" width="16" height="16" alt="Lookup" /></a>
+>>> print conditional_escape(w.render('test', [m1.pk]))
+<input type="text" name="test" value="1" class="vManyToManyRawIdAdminField" /><a href="../../../admin_widgets/member/" class="related-lookup" id="lookup_id_test" onclick="return showRelatedObjectLookupPopup(this);"> <img src="%(ADMIN_MEDIA_PREFIX)simg/admin/selector-search.gif" width="16" height="16" alt="Lookup" /></a>
 >>> w._has_changed(None, None)
 False
 >>> w._has_changed([], None)