Add configuration-show to OSC

This change adds database support to the python-openstackclient
project for the configuration-show command.

The trove command configuration-show is now:
    openstack database configuration show

Change-Id: I2f2cd93054ecaa8f67722a0efd8789b63e59b373
Partially-Implements: trove-support-in-python-openstackclient

releasenotes/notes/add-configuration-show-to-osc-c139bb20a2ec18ec.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - The command ``trove configuration-show`` is now available to
+    use in the python-openstackclient CLI as ``openstack database
+    configuration show``

setup.cfg

@@ -33,6 +33,7 @@ openstack.database.v1 =
     database_backup_list = troveclient.osc.v1.database_backups:ListDatabaseBackups
     database_cluster_list = troveclient.osc.v1.database_clusters:ListDatabaseClusters
     database_configuration_list = troveclient.osc.v1.database_configurations:ListDatabaseConfigurations
+    database_configuration_show = troveclient.osc.v1.database_configurations:ShowDatabaseConfiguration
     database_flavor_list = troveclient.osc.v1.database_flavors:ListDatabaseFlavors
     database_instance_list = troveclient.osc.v1.database_instances:ListDatabaseInstances
     database_limit_list = troveclient.osc.v1.database_limits:ListDatabaseLimits

troveclient/osc/v1/database_configurations.py

@@ -12,12 +12,21 @@
 
 """Database v1 Configurations action implementations"""
 
+import json
 from osc_lib.command import command
 from osc_lib import utils as osc_utils
+import six
 
 from troveclient.i18n import _
 
 
+def set_attributes_for_print_detail(configuration):
+    info = configuration._info.copy()
+    info['values'] = json.dumps(configuration.values)
+    del info['datastore_version_id']
+    return info
+
+
 class ListDatabaseConfigurations(command.Lister):
 
     _description = _("List database configurations")
@@ -51,3 +60,23 @@ class ListDatabaseConfigurations(command.Lister):
         config = [osc_utils.get_item_properties(c, self.columns)
                   for c in config]
         return self.columns, config
+
+
+class ShowDatabaseConfiguration(command.ShowOne):
+    _description = _("Shows details of a database configuration group.")
+
+    def get_parser(self, prog_name):
+        parser = super(ShowDatabaseConfiguration, self).get_parser(prog_name)
+        parser.add_argument(
+            'configuration_group',
+            metavar='<configuration_group>',
+            help=_('ID or name of the configuration group'),
+        )
+        return parser
+
+    def take_action(self, parsed_args):
+        db_configurations = self.app.client_manager.database.configurations
+        configuration = osc_utils.find_resource(
+            db_configurations, parsed_args.configuration_group)
+        configuration = set_attributes_for_print_detail(configuration)
+        return zip(*sorted(six.iteritems(configuration)))

troveclient/tests/osc/v1/test_database_configurations.py

@@ -47,3 +47,33 @@ class TestConfigurationList(TestConfigurations):
         self.configuration_client.list.assert_called_once_with(**self.defaults)
         self.assertEqual(self.columns, columns)
         self.assertEqual([tuple(self.values)], data)
+
+
+class TestConfigurationShow(TestConfigurations):
+
+    values = ('2015-05-16T10:24:28', 'mysql', '5.6', '', 'c-123',
+              'test_config', '2015-05-16T10:24:29', '{"max_connections": 5}')
+
+    def setUp(self):
+        super(TestConfigurationShow, self).setUp()
+        self.cmd = database_configurations.ShowDatabaseConfiguration(self.app,
+                                                                     None)
+        self.data = self.fake_configurations.get_configurations_c_123()
+        self.configuration_client.get.return_value = self.data
+        self.columns = (
+            'created',
+            'datastore_name',
+            'datastore_version_name',
+            'description',
+            'id',
+            'name',
+            'updated',
+            'values',
+        )
+
+    def test_show(self):
+        args = ['c-123']
+        parsed_args = self.check_parser(self.cmd, args, [])
+        columns, data = self.cmd.take_action(parsed_args)
+        self.assertEqual(self.columns, columns)
+        self.assertEqual(self.values, data)