Update

CHANGELOG

@@ -36,6 +36,7 @@ Other:
 - Refactored projector API using metaclasses now.
 - Renamed SignalConnectMetaClass classmethod get_all_objects to get_all
   (private API).
+- Refactored config API.
 - Used AngularJS with additional libraries for single page frontend.
 - Removed use of 'django.views.i18n.javascript_catalog'. Used angular-gettext
   now.

openslides/config/api.py

@@ -19,25 +19,21 @@ class ConfigHandler(object):
             return self[key]
 
     def __setitem__(self, key, value):
-        # Save the new value to the database
+        # Check if the variable is defined.
+        if key not in self:
+            raise ConfigNotFound('The config variable %s was not found.' % key)
+
+        # Save the new value to the database.
         updated_rows = ConfigStore.objects.filter(key=key).update(value=value)
         if not updated_rows:
             ConfigStore.objects.create(key=key, value=value)
 
-        # Update cache
-        try:
-            self._cache[key] = value
-        except AttributeError:
-            # This happens, when a config-var is set, before __getitem__ was
-            # called. In this case nothing should happen.
-            pass
+        # Update cache.
+        self._cache[key] = value
 
-        # Call on_change callback
-        for receiver, config_collection in config_signal.send(sender='set_value'):
-            for config_variable in config_collection.variables:
-                if config_variable.name == key and config_variable.on_change:
-                    config_variable.on_change()
-                    break
+        # Call on_change callback.
+        if self.get_config_variables()[key].on_change:
+            self.get_config_variables()[key].on_change()
 
     def items(self):
         """
@@ -47,15 +43,27 @@ class ConfigHandler(object):
             self.setup_cache()
         return self._cache.items()
 
+    def get_config_variables(self):
+        """
+        Returns a dictionary with all ConfigVariable instances of all
+        collections. The key is the name of the config variables.
+        """
+        result = {}
+        for receiver, config_collection in config_signal.send(sender='get_config_variables'):
+            for config_variable in config_collection.variables:
+                if config_variable.name in result:
+                    raise ConfigError('Too many values for config variable %s found.' % config_variable.name)
+                result[config_variable.name] = config_variable
+        return result
+
     def get_default(self, key):
         """
         Returns the default value for 'key'.
         """
-        for receiver, config_collection in config_signal.send(sender='get_default'):
-            for config_variable in config_collection.variables:
-                if config_variable.name == key:
-                    return config_variable.default_value
-        raise ConfigNotFound('The config variable %s was not found.' % key)
+        try:
+            return self.get_config_variables()[key].default_value
+        except KeyError:
+            raise ConfigNotFound('The config variable %s was not found.' % key)
 
     def setup_cache(self):
         """
@@ -63,11 +71,8 @@ class ConfigHandler(object):
         save the default to the cache.
         """
         self._cache = {}
-        for receiver, config_collection in config_signal.send(sender='setup_cache'):
-            for config_variable in config_collection.variables:
-                if config_variable.name in self._cache:
-                    raise ConfigError('Too many values for config variable %s found.' % config_variable.name)
-                self._cache[config_variable.name] = config_variable.default_value
+        for key, config_variable in self.get_config_variables().items():
+            self._cache[key] = config_variable.default_value
         for config_object in ConfigStore.objects.all():
             self._cache[config_object.key] = config_object.value
 
@@ -84,10 +89,9 @@ class ConfigHandler(object):
         Generator to get all config variables as strings when their values are
         intended to be translated.
         """
-        for receiver, config_collection in config_signal.send(sender='get_all_translatable'):
-            for config_variable in config_collection.variables:
-                if config_variable.translatable:
-                    yield config_variable.name
+        for config_variable in self.get_config_variables().values():
+            if config_variable.translatable:
+                yield config_variable.name
 
 config = ConfigHandler()
 """

openslides/config/views.py

@@ -1,10 +1,11 @@
 from django import forms
 from django.contrib import messages
 from django.core.urlresolvers import reverse
+from django.core.exceptions import ValidationError as DjangoValidationError
 from django.http import Http404
 from django.utils.translation import ugettext as _
 
-from openslides.utils.rest_api import Response, ViewSet
+from openslides.utils.rest_api import Response, ValidationError, ViewSet
 from openslides.utils.views import FormView
 
 from .api import config
@@ -132,14 +133,29 @@ class ConfigViewSet(ViewSet):
     def update(self, request, *args, **kwargs):
         """
         Updates one config variable. Only managers can do this.
+
+        Example: {"value": 42}
         """
+        # Check permission.
         if not request.user.has_perm('config.can_manage'):
             self.permission_denied(request)
-        key = kwargs['pk']
+
         # Check if pk is a valid config variable key.
+        key = kwargs['pk']
         if key not in config:
             raise Http404
+
+        # Validate value.
+        form_field = config.get_config_variables()[key].form_field
+        value = request.data['value']
+        if form_field:
+            try:
+                form_field.clean(value)
+            except DjangoValidationError as e:
+                raise ValidationError({'detail': e.messages[0]})
+
         # Change value.
-        config[key] = request.data
+        config[key] = value
+
         # Return response.
-        return Response({'key': key, 'value': request.data})
+        return Response({'key': key, 'value': value})

tests/integration/config/test_views.py

@@ -0,0 +1,60 @@
+from django import forms
+from django.dispatch import receiver
+from django.core.urlresolvers import reverse
+from rest_framework import status
+from rest_framework.test import APIClient
+
+from openslides.config.api import config, ConfigCollection, ConfigVariable
+from openslides.config.signals import config_signal
+from openslides.utils.test import TestCase
+
+
+class ConfigViewSet(TestCase):
+    """
+    Tests requests to deal with config variables.
+    """
+    def test_retrieve(self):
+        self.client.login(username='admin', password='admin')
+        config['test_var_aeW3Quahkah1phahCheo'] = 'test_value_Oovoojieme7eephaed2A'
+        response = self.client.get(reverse('config-detail', args=['test_var_aeW3Quahkah1phahCheo']))
+        self.assertEqual(
+            response.data,
+            {'key': 'test_var_aeW3Quahkah1phahCheo',
+             'value': 'test_value_Oovoojieme7eephaed2A'})
+
+    def test_update(self):
+        self.client = APIClient()
+        self.client.login(username='admin', password='admin')
+        response = self.client.put(
+            reverse('config-detail', args=['test_var_Xeiizi7ooH8Thuk5aida']),
+            {'value': 'test_value_Phohx3oopeichaiTheiw'})
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        self.assertEqual(config['test_var_Xeiizi7ooH8Thuk5aida'], 'test_value_Phohx3oopeichaiTheiw')
+
+    def test_update_wrong_datatype(self):
+        self.client = APIClient()
+        self.client.login(username='admin', password='admin')
+        response = self.client.put(
+            reverse('config-detail', args=['test_var_ohhii4iavoh5Phoh5ahg']),
+            {'value': 'test_value_string'})
+        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
+        self.assertEqual(response.data, {'detail': 'Enter a whole number.'})
+
+
+@receiver(config_signal, dispatch_uid='set_simple_config_view_integration_config_test')
+def set_simple_config_view_integration_config_test(sender, **kwargs):
+    """
+    Sets a simple config view with some config variables but without
+    grouping.
+    """
+    return ConfigCollection(
+        title='Config vars for testing',
+        url='test_url_ieXao5Wae5Duoy6Wohtu',
+        variables=(ConfigVariable(name='test_var_aeW3Quahkah1phahCheo',
+                                  default_value=None),
+                   ConfigVariable(name='test_var_Xeiizi7ooH8Thuk5aida',
+                                  default_value='',
+                                  form_field=forms.CharField()),
+                   ConfigVariable(name='test_var_ohhii4iavoh5Phoh5ahg',
+                                  default_value=0,
+                                  form_field=forms.IntegerField())))

tests/old/config/test_config.py

@@ -67,9 +67,9 @@ class HandleConfigTest(TestCase):
 
     def test_set_value_before_getting_it(self):
         """
-        Try to call __setitem__ before __getitem.
+        Try to call __setitem__ before __getitem__.
         """
-        config['my_config_var'] = 'value'
+        config['additional_config_var'] = 'value'
 
     def test_on_change(self):
         """

tests/old/core/test_template_tags_filters.py

@@ -1,6 +1,8 @@
+from django.dispatch import receiver
 from django.template import Context, Template
 
-from openslides.config.api import config
+from openslides.config.api import ConfigCollection, ConfigVariable, config
+from openslides.config.signals import config_signal
 from openslides.utils.test import TestCase
 
 
@@ -27,3 +29,18 @@ class ConfigTagAndFilter(TestCase):
         template = Template(template_code)
         self.assertTrue('FdgfkR04jtg9f8bq' in template.render(Context({})))
         self.assertFalse('bad_e0fvkfHFD' in template.render(Context({})))
+
+
+@receiver(config_signal, dispatch_uid='set_simple_config_view_template_tag_test')
+def set_simple_config_view_template_tag_test(sender, **kwargs):
+    """
+    Sets a simple config view with some config variables but without
+    grouping.
+    """
+    return ConfigCollection(
+        title='Config vars for testing with template tag',
+        url='testsimplepagetemplatetag',
+        variables=(ConfigVariable(name='taiNg3reQuooGha4', default_value=None),
+                   ConfigVariable(name='fkjTze56ncuejWqs', default_value=None),
+                   ConfigVariable(name='jfhsnezfh452w6Fg', default_value=None),
+                   ConfigVariable(name='sdmvldkfgj4534gk', default_value=None)))