Use PUT instead of PATCH for segment port detach

Change-Id: Ib411f1898778362030c91ddc707bdd8dc1e07760

vmware_nsxlib/tests/unit/v3/policy/test_resources.py

@@ -4567,21 +4567,18 @@ class TestPolicySegmentPort(NsxPolicyLibTestCase):
         segment_id = "segment"
         port_id = "port"
         tags = [{'scope': 'a', 'tag': 'b'}]
-        with mock.patch.object(self.policy_api,
-                               "create_or_update") as api_call:
+        with mock.patch.object(self.policy_api.client,
+                               "get", return_value={}) as api_get,\
+            mock.patch.object(self.policy_api.client,
+                              "update") as api_put:
             self.resourceApi.detach(
                 segment_id, port_id, tags=tags,
                 tenant=TEST_TENANT)
 
-            expected_def = core_defs.SegmentPortDef(
-                segment_id=segment_id,
-                port_id=port_id,
-                attachment_type=None,
-                vif_id=None,
-                tags=tags,
-                tenant=TEST_TENANT)
-
-            self.assert_called_with_def(api_call, expected_def)
+            api_get.assert_called_once()
+            api_put.assert_called_once_with(
+                "%s/segments/%s/ports/%s" % (TEST_TENANT, segment_id, port_id),
+                {'attachment': None})
 
 
 class TestPolicySegmentProfileBase(NsxPolicyLibTestCase):

vmware_nsxlib/v3/policy/core_resources.py

@@ -2183,14 +2183,22 @@ class NsxPolicySegmentPortApi(NsxPolicyResourceBase):
 
     def detach(self, segment_id, port_id, tags=IGNORE,
                tenant=constants.POLICY_INFRA_TENANT):
+        # Due to platform limitation, PUT should be used here and not PATCH
+        port_def = self.entry_def(
+            segment_id=segment_id,
+            port_id=port_id,
+            tenant=tenant)
+        path = port_def.get_resource_path()
 
-        port_def = self.entry_def(segment_id=segment_id,
-                                  port_id=port_id,
-                                  vif_id=None,
-                                  attachment_type=None,
-                                  tags=tags,
-                                  tenant=tenant)
-        self.policy_api.create_or_update(port_def)
+        @utils.retry_upon_exception(
+            exceptions.StaleRevision,
+            max_attempts=self.policy_api.client.max_attempts)
+        def _detach():
+            port = self.policy_api.get(port_def)
+            port['attachment'] = None
+            self.policy_api.client.update(path, port)
+
+        _detach()
 
     def attach(self, segment_id, port_id,
                attachment_type,