Overwrite/Clear Flavor property

This patch adds support to overwrite/clear the flavor's
property using the new ``--no-property`` option in the
``flavor set`` command.

Change-Id: I873c96fcf223bbd638a19b908766d904a84e8431
Implements: blueprint allow-overwrite-set-options
Co-Authored By: zhiyong.dai@easystack.cn

doc/source/command-objects/flavor.rst

@@ -144,6 +144,7 @@ Set flavor properties
 .. code:: bash
 
     openstack flavor set
+        [--no-property]
         [--property <key=value> [...] ]
         [--project <project>]
         [--project-domain <project-domain>]
@@ -162,6 +163,11 @@ Set flavor properties
     Domain the project belongs to (name or ID).
     This can be used in case collisions between project names exist.
 
+.. option:: --no-property
+
+    Remove all properties from this flavor (specify both --no-property and --property
+    to remove the current properties before setting new properties.)
+
 .. describe:: <flavor>
 
     Flavor to modify (name or ID)

openstackclient/compute/v2/flavor.py

@@ -312,6 +312,14 @@ class SetFlavor(command.Command):
             metavar="<flavor>",
             help=_("Flavor to modify (name or ID)")
         )
+        parser.add_argument(
+            "--no-property",
+            action="store_true",
+            help=_("Remove all properties from this flavor "
+                   "(specify both --no-property and --property"
+                   " to remove the current properties before setting"
+                   " new properties.)"),
+        )
         parser.add_argument(
             "--property",
             metavar="<key=value>",
@@ -336,6 +344,15 @@ class SetFlavor(command.Command):
         flavor = _find_flavor(compute_client, parsed_args.flavor)
 
         result = 0
+        key_list = []
+        if parsed_args.no_property:
+            try:
+                for key in flavor.get_keys().keys():
+                    key_list.append(key)
+                flavor.unset_keys(key_list)
+            except Exception as e:
+                LOG.error(_("Failed to clear flavor property: %s"), e)
+                result += 1
         if parsed_args.property:
             try:
                 flavor.set_keys(parsed_args.property)

openstackclient/tests/unit/compute/v2/test_flavor.py

@@ -528,6 +528,23 @@ class TestFlavorSet(TestFlavor):
         self.flavor.set_keys.assert_called_with({'FOO': '"B A R"'})
         self.assertIsNone(result)
 
+    def test_flavor_set_no_property(self):
+        arglist = [
+            '--no-property',
+            'baremetal'
+        ]
+        verifylist = [
+            ('no_property', True),
+            ('flavor', 'baremetal')
+        ]
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        result = self.cmd.take_action(parsed_args)
+        self.flavors_mock.find.assert_called_with(name=parsed_args.flavor,
+                                                  is_public=None)
+        self.flavor.unset_keys.assert_called_with(['property'])
+        self.assertIsNone(result)
+
     def test_flavor_set_project(self):
         arglist = [
             '--project', self.project.id,

releasenotes/notes/add-no-property-f97e4b2f390cec06.yaml

@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    Add support to clear/overwrite all flavor properties using
+    ``--no-property`` option with ``flavor set`` command.
+    [ Blueprint  `allow-overwrite-set-options <https://blueprints.launchpad.net/python-openstackclient/+spec/allow-overwrite-set-options>` _]