Added Feature for config app, to return the default value for a key

openslides/config/api.py

@@ -45,19 +45,29 @@ class ConfigHandler(object):
             pass
 
         # Call on_change callback
-        for receiver, config_page in config_signal.send(sender=self):
+        for receiver, config_page in config_signal.send(sender='set_value'):
             for config_variable in config_page.variables:
                 if config_variable.name == key and config_variable.on_change:
                     config_variable.on_change()
                     break
 
+    def get_default(self, key):
+        """
+        Returns the default value for 'key'.
+        """
+        for receiver, config_page in config_signal.send(sender='get_default'):
+            for config_variable in config_page.variables:
+                if config_variable.name == key:
+                    return config_variable.default_value
+        raise ConfigNotFound('The config variable %s was not found.' % key)
+
     def setup_cache(self):
         """
         Loads all config variables from the database and by sending a
         signal to get the default into the cache.
         """
         self._cache = {}
-        for receiver, config_page in config_signal.send(sender=self):
+        for receiver, config_page in config_signal.send(sender='setup_cache'):
             for config_variable in config_page.variables:
                 if config_variable.name in self._cache:
                     raise ConfigError('Too many values for config variable %s found.' % config_variable.name)

openslides/projector/views.py

@@ -6,7 +6,7 @@
 
     Views for the projector app.
 
-    :copyright: 2011, 2012 by OpenSlides team, see AUTHORS.
+    :copyright: 2011–2013 by OpenSlides team, see AUTHORS.
     :license: GNU GPL, see LICENSE for more details.
 """
 
@@ -155,8 +155,8 @@ class ProjectorEdit(RedirectView):
             if config['up'] < 0:
                 config['up'] = int(config['up']) + 5
         elif direction == 'clean':
-            config['up'] = 0  # TODO: Use default value from the signal instead of fix value here
+            config['up'] = config.get_default('up')
-            config['bigger'] = 100  # TODO: Use default value from the signal instead of fix value here
+            config['bigger'] = config.get_default('bigger')
 
 
 class CountdownEdit(RedirectView):

tests/config/test_config.py

@@ -89,6 +89,17 @@ class HandleConfigTest(TestCase):
             value='new_string_kbmbnfhdgibkdjshg452bc')
         self.assertEqual(config['var_with_callback_ghvnfjd5768gdfkwg0hm2'], 'new_string_kbmbnfhdgibkdjshg452bc')
 
+    def test_get_default(self):
+        """
+        Tests the methode 'default'.
+        """
+        self.assertEqual(config.get_default('string_var'), 'default_string_rien4ooCZieng6ah')
+        self.assertRaisesMessage(
+            ConfigNotFound,
+            'The config variable unknown_var was not found.',
+            config.get_default,
+            'unknown_var')
+
 
 class ConfigFormTest(TestCase):