Fixed #17037 -- Added a --all option to diffsettings.

django/core/management/commands/diffsettings.py

+from optparse import make_option
+
 from django.core.management.base import NoArgsCommand
 
 def module_to_dict(module, omittable=lambda k: k.startswith('_')):
-    "Converts a module namespace to a Python dictionary. Used by get_settings_diff."
-    return dict([(k, repr(v)) for k, v in module.__dict__.items() if not omittable(k)])
+    """Converts a module namespace to a Python dictionary."""
+    return dict((k, repr(v)) for k, v in module.__dict__.items() if not omittable(k))
 
 class Command(NoArgsCommand):
     help = """Displays differences between the current settings.py and Django's
     default settings. Settings that don't appear in the defaults are
     followed by "###"."""
 
+    option_list = NoArgsCommand.option_list + (
+        make_option('--all', action='store_true', dest='all', default=False,
+                    help='Display all settings, regardless of their value. '
+                         'Default values are prefixed by "###".'),
+    )
+
     requires_model_validation = False
 
     def handle_noargs(self, **options):
@@ -22,9 +30,11 @@ class Command(NoArgsCommand):
         default_settings = module_to_dict(global_settings)
 
         output = []
-        for key in sorted(user_settings.keys()):
+        for key in sorted(user_settings):
             if key not in default_settings:
                 output.append("%s = %s  ###" % (key, user_settings[key]))
             elif user_settings[key] != default_settings[key]:
                 output.append("%s = %s" % (key, user_settings[key]))
+            elif options['all']:
+                output.append("### %s = %s" % (key, user_settings[key]))
         return '\n'.join(output)

docs/ref/django-admin.txt

@@ -168,8 +168,11 @@ example, the default settings don't define :setting:`ROOT_URLCONF`, so
 :setting:`ROOT_URLCONF` is followed by ``"###"`` in the output of
 ``diffsettings``.
 
-Note that Django's default settings live in ``django/conf/global_settings.py``,
-if you're ever curious to see the full list of defaults.
+The :djadminopt:`--all` option may be provided to display all settings, even
+if they have Django's default value. Such settings are prefixed by ``"###"``.
+
+.. versionadded:: 1.6
+    The :djadminopt:`--all` option was added.
 
 dumpdata <appname appname appname.Model ...>
 --------------------------------------------

docs/releases/1.6.txt

@@ -157,6 +157,8 @@ Minor features
 * The documentation contains a :doc:`deployment checklist
   </howto/deployment/checklist>`.
 
+* The :djadmin:`diffsettings` comand gained a ``--all`` option.
+
 Backwards incompatible changes in 1.6
 =====================================
 

tests/admin_scripts/tests.py

@@ -1661,11 +1661,21 @@ class StartProject(LiveServerTestCase, AdminScriptTestCase):
 
 class DiffSettings(AdminScriptTestCase):
     """Tests for diffsettings management command."""
+
     def test_basic(self):
-        "Runs without error and emits settings diff."
+        """Runs without error and emits settings diff."""
         self.write_settings('settings_to_diff.py', sdict={'FOO': '"bar"'})
         self.addCleanup(self.remove_settings, 'settings_to_diff.py')
         args = ['diffsettings', '--settings=settings_to_diff']
         out, err = self.run_manage(args)
         self.assertNoOutput(err)
         self.assertOutput(out, "FOO = 'bar'  ###")
+
+    def test_all(self):
+        """The all option also shows settings with the default value."""
+        self.write_settings('settings_to_diff.py', sdict={'STATIC_URL': 'None'})
+        self.addCleanup(self.remove_settings, 'settings_to_diff.py')
+        args = ['diffsettings', '--settings=settings_to_diff', '--all']
+        out, err = self.run_manage(args)
+        self.assertNoOutput(err)
+        self.assertOutput(out, "### STATIC_URL = None")