Allow ability to remove security groups from ports

This commit adds the option --no-security-groups to port-update
in order to remove security groups from a port.

Fixes bug 1112089

Change-Id: I43a5cc2c8b443f2d34fffe66b442925a5ae312ac

3 files changed, 33 insertions, 9 deletions

diff --git a/quantumclient/quantum/v2_0/__init__.py b/quantumclient/quantum/v2_0/__init__.py
index fbc64ed..7387e07 100644
--- a/quantumclient/quantum/v2_0/__init__.py
+++ b/quantumclient/quantum/v2_0/__init__.py
@@ -254,6 +254,12 @@ class QuantumCommand(command.OpenStackCommand):
                 elif v is None:
                     data[self.resource][k] = ''
 
+    def add_known_arguments(self, parser):
+        pass
+
+    def args2body(self, parsed_args):
+        return {}
+
 
 class CreateCommand(QuantumCommand, show.ShowOne):
     """Create a resource for a given tenant
@@ -275,12 +281,6 @@ class CreateCommand(QuantumCommand, show.ShowOne):
         self.add_known_arguments(parser)
         return parser
 
-    def add_known_arguments(self, parser):
-        pass
-
-    def args2body(self, parsed_args):
-        return {}
-
     def get_data(self, parsed_args):
         self.log.debug('get_data(%s)' % parsed_args)
         quantum_client = self.get_client()
@@ -318,6 +318,7 @@ class UpdateCommand(QuantumCommand):
             help='ID or name of %s to update' % self.resource)
         add_extra_argument(parser, 'value_specs',
                            'new values for the %s' % self.resource)
+        self.add_known_arguments(parser)
         return parser
 
     def run(self, parsed_args):
@@ -325,16 +326,19 @@ class UpdateCommand(QuantumCommand):
         quantum_client = self.get_client()
         quantum_client.format = parsed_args.request_format
         value_specs = parsed_args.value_specs
-        if not value_specs:
+        dict_args = self.args2body(parsed_args).get(self.resource, {})
+        dict_specs = parse_args_to_dict(value_specs)
+        body = {self.resource: dict(dict_args.items() +
+                                    dict_specs.items())}
+        if not body[self.resource]:
             raise exceptions.CommandError(
                 "Must specify new values to update %s" % self.resource)
-        data = {self.resource: parse_args_to_dict(value_specs)}
         _id = find_resourceid_by_name_or_id(quantum_client,
                                             self.resource,
                                             parsed_args.id)
         obj_updator = getattr(quantum_client,
                               "update_%s" % self.resource)
-        obj_updator(_id, data)
+        obj_updator(_id, body)
         print >>self.app.stdout, (
             _('Updated %(resource)s: %(id)s') %
             {'id': parsed_args.id, 'resource': self.resource})
diff --git a/quantumclient/quantum/v2_0/port.py b/quantumclient/quantum/v2_0/port.py
index 27d4998..76468b7 100644
--- a/quantumclient/quantum/v2_0/port.py
+++ b/quantumclient/quantum/v2_0/port.py
@@ -174,3 +174,15 @@ class UpdatePort(UpdateCommand):
 
     resource = 'port'
     log = logging.getLogger(__name__ + '.UpdatePort')
+
+    def add_known_arguments(self, parser):
+        parser.add_argument(
+            '--no-security-groups',
+            default=False, action='store_true',
+            help='remove security groups from port')
+
+    def args2body(self, parsed_args):
+        body = {'port': {}}
+        if parsed_args.no_security_groups:
+            body['port'].update({'security_groups': None})
+        return body
diff --git a/quantumclient/tests/unit/test_cli20_port.py b/quantumclient/tests/unit/test_cli20_port.py
index 5580dde..c4d9dad 100644
--- a/quantumclient/tests/unit/test_cli20_port.py
+++ b/quantumclient/tests/unit/test_cli20_port.py
@@ -262,6 +262,14 @@ class CLITestV20Port(CLITestV20Base):
                                    {'name': 'myname', 'tags': ['a', 'b'], }
                                    )
 
+    def test_update_port_security_group_off(self):
+        """Update port: --no-security-groups myid."""
+        resource = 'port'
+        cmd = UpdatePort(MyApp(sys.stdout), None)
+        self._test_update_resource(resource, cmd, 'myid',
+                                   ['--no-security-groups', 'myid'],
+                                   {'security_groups': None})
+
     def test_show_port(self):
         """Show port: --fields id --fields name myid."""
         resource = 'port'