Added api retrieve method for config variables. Refactored api output.

openslides/config/api.py

@@ -39,13 +39,13 @@ class ConfigHandler(object):
                     config_variable.on_change()
                     break
 
-    def get_data_as_dict(self):
+    def items(self):
         """
-        Returns all config variables as dictionary retrieved from the config cache.
+        Returns key-value pairs of all config variables.
         """
         if not hasattr(self, '_cache'):
             self.setup_cache()
-        return self._cache
+        return self._cache.items()
 
     def get_default(self, key):
         """

openslides/config/views.py

@@ -1,12 +1,14 @@
 from django import forms
 from django.contrib import messages
 from django.core.urlresolvers import reverse
+from django.http import Http404
 from django.utils.translation import ugettext as _
 
 from openslides.utils.rest_api import response, viewsets
 from openslides.utils.views import FormView
 
 from .api import config
+from .exceptions import ConfigNotFound
 from .signals import config_signal
 
 
@@ -105,16 +107,32 @@ class ConfigView(FormView):
 
 class ConfigViewSet(viewsets.ViewSet):
     """
-    API endpoint to list and update the config.
+    API endpoint to list, retrieve and update the config.
     """
     def list(self, request):
         """
-        Lists als config variables. Everybody can see this.
+        Lists all config variables. Everybody can see them.
         """
         # TODO: Check if we need permission check here.
-        return response.Response(config.get_data_as_dict())
+        data = ({'key': key, 'value': value} for key, value in config.items())
+        return response.Response(data)
+
+    def retrieve(self, request, *args, **kwargs):
+        """
+        Retrieves one config variable.
+        """
+        # TODO: Check if we need permission check here.
+        key = kwargs['pk']
+        try:
+            data = {'key': key, 'value': config[key]}
+        except ConfigNotFound:
+            raise Http404
+        return response.Response(data)
 
     def update(self, request, pk=None):
+        """
+        TODO
+        """
         if not request.user.has_perm('config.can_manage'):
             self.permission_denied(request)
         else: