Fixed #13154 -- Fixed the URL resolver's reverse() to match the behavior of its resolve() with regard to the default kwargs. Many thanks to patrys.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16177 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/urlresolvers.py

@@ -206,20 +206,20 @@ class RegexURLResolver(object):
                 else:
                     parent = normalize(pattern.regex.pattern)
                     for name in pattern.reverse_dict:
-                        for matches, pat in pattern.reverse_dict.getlist(name):
+                        for matches, pat, defaults in pattern.reverse_dict.getlist(name):
                             new_matches = []
                             for piece, p_args in parent:
                                 new_matches.extend([(piece + suffix, p_args + args) for (suffix, args) in matches])
-                            lookups.appendlist(name, (new_matches, p_pattern + pat))
+                            lookups.appendlist(name, (new_matches, p_pattern + pat, dict(defaults, **pattern.default_kwargs)))
                     for namespace, (prefix, sub_pattern) in pattern.namespace_dict.items():
                         namespaces[namespace] = (p_pattern + prefix, sub_pattern)
                     for app_name, namespace_list in pattern.app_dict.items():
                         apps.setdefault(app_name, []).extend(namespace_list)
             else:
                 bits = normalize(p_pattern)
-                lookups.appendlist(pattern.callback, (bits, p_pattern))
+                lookups.appendlist(pattern.callback, (bits, p_pattern, pattern.default_args))
                 if pattern.name is not None:
-                    lookups.appendlist(pattern.name, (bits, p_pattern))
+                    lookups.appendlist(pattern.name, (bits, p_pattern, pattern.default_args))
         self._reverse_dict = lookups
         self._namespace_dict = namespaces
         self._app_dict = apps
@@ -310,7 +310,7 @@ class RegexURLResolver(object):
         except (ImportError, AttributeError), e:
             raise NoReverseMatch("Error importing '%s': %s." % (lookup_view, e))
         possibilities = self.reverse_dict.getlist(lookup_view)
-        for possibility, pattern in possibilities:
+        for possibility, pattern, defaults in possibilities:
             for result, params in possibility:
                 if args:
                     if len(args) != len(params):
@@ -318,7 +318,14 @@ class RegexURLResolver(object):
                     unicode_args = [force_unicode(val) for val in args]
                     candidate =  result % dict(zip(params, unicode_args))
                 else:
-                    if set(kwargs.keys()) != set(params):
+                    if set(kwargs.keys() + defaults.keys()) != set(params + defaults.keys()):
+                        continue
+                    matches = True
+                    for k, v in defaults.items():
+                        if kwargs.get(k, v) != v:
+                            matches = False
+                            break
+                    if not matches:
                         continue
                     unicode_kwargs = dict([(k, force_unicode(v)) for (k, v) in kwargs.items()])
                     candidate = result % unicode_kwargs

tests/regressiontests/urlpatterns_reverse/tests.py

@@ -127,8 +127,13 @@ test_data = (
     ('kwargs_view', '/arg_view/10/', [], {'arg1':10}),
     ('regressiontests.urlpatterns_reverse.views.absolute_kwargs_view', '/absolute_arg_view/', [], {}),
     ('regressiontests.urlpatterns_reverse.views.absolute_kwargs_view', '/absolute_arg_view/10/', [], {'arg1':10}),
-    ('non_path_include', '/includes/non_path_include/', [], {})
+    ('non_path_include', '/includes/non_path_include/', [], {}),
 
+    # Tests for #13154
+    ('defaults', '/defaults_view1/3/', [], {'arg1': 3, 'arg2': 1}),
+    ('defaults', '/defaults_view2/3/', [], {'arg1': 3, 'arg2': 2}),
+    ('defaults', NoReverseMatch, [], {'arg1': 3, 'arg2': 3}),
+    ('defaults', NoReverseMatch, [], {'arg2': 1}),
 )
 
 class NoURLPatternsTests(TestCase):

tests/regressiontests/urlpatterns_reverse/urls.py

@@ -19,7 +19,7 @@ urlpatterns = patterns('',
     url(r'^people/(?:name/)', empty_view, name="people2"),
     url(r'^people/(?:name/(\w+)/)?', empty_view, name="people2a"),
     url(r'^optional/(?P<name>.*)/(?:.+/)?', empty_view, name="optional"),
-    url(r'^hardcoded/$', 'hardcoded/', empty_view, name="hardcoded"),
+    url(r'^hardcoded/$', empty_view, name="hardcoded"),
     url(r'^hardcoded/doc\.pdf$', empty_view, name="hardcoded2"),
     url(r'^people/(?P<state>\w\w)/(?P<name>\w+)/$', empty_view, name="people3"),
     url(r'^people/(?P<state>\w\w)/(?P<name>\d)/$', empty_view, name="people4"),
@@ -55,7 +55,11 @@ urlpatterns = patterns('',
     url(r'arg_view/(?P<arg1>\d+)/$', 'kwargs_view'),
     url(r'absolute_arg_view/(?P<arg1>\d+)/$', absolute_kwargs_view),
     url(r'absolute_arg_view/$', absolute_kwargs_view),
-    
+
+    # Tests for #13154. Mixed syntax to test both ways of defining URLs.
+    url(r'defaults_view1/(?P<arg1>\d+)/', 'defaults_view', {'arg2': 1}, name='defaults'),
+    (r'defaults_view2/(?P<arg1>\d+)/', 'defaults_view', {'arg2': 2}, 'defaults'),
+
     url('^includes/', include(other_patterns)),
 
 )

tests/regressiontests/urlpatterns_reverse/views.py

@@ -13,6 +13,9 @@ def kwargs_view(request, arg1=1, arg2=2):
 def absolute_kwargs_view(request, arg1=1, arg2=2):
     return HttpResponse('')
 
+def defaults_view(request, arg1, arg2):
+    pass
+
 class ViewClass(object):
     def __call__(self, request, *args, **kwargs):
         return HttpResponse('')