volume: Correct output of 'volume attachment create'

When adding these, we missed that the underlying cinder library call
actually returns a dictionary and not a Resource-based object. This
requires slightly different handling. Fix this.

Change-Id: Ie065fe4198ae1238830cb619220e856390d4cb6e
Signed-off-by: Stephen Finucane <sfinucan@redhat.com>

openstackclient/tests/unit/volume/v3/test_volume_attachment.py

@@ -73,8 +73,9 @@ class TestVolumeAttachmentCreate(TestVolumeAttachment):
 
         self.volumes_mock.get.return_value = self.volume
         self.servers_mock.get.return_value = self.server
+        # VolumeAttachmentManager.create returns a dict
         self.volume_attachments_mock.create.return_value = \
-            self.volume_attachment
+            self.volume_attachment.to_dict()
 
         self.cmd = volume_attachment.CreateVolumeAttachment(self.app, None)
 

openstackclient/volume/v3/volume_attachment.py

@@ -51,18 +51,27 @@ def _format_attachment(attachment):
         'Properties',
     )
 
-    # TODO(stephenfin): Improve output with the nested connection_info
+    # VolumeAttachmentManager.create returns a dict while everything else
-    # field - cinderclient printed two things but that's equally ugly
+    # returns a VolumeAttachment object
-    return (
+    if isinstance(attachment, dict):
-        column_headers,
+        data = []
-        utils.get_item_properties(
+        for column in columns:
+            if column == 'connection_info':
+                data.append(format_columns.DictColumn(attachment[column]))
+                continue
+            data.append(attachment[column])
+    else:
+        data = utils.get_item_properties(
             attachment,
             columns,
             formatters={
                 'connection_info': format_columns.DictColumn,
             },
-        ),
+        )
-    )
+
+    # TODO(stephenfin): Improve output with the nested connection_info
+    # field - cinderclient printed two things but that's equally ugly
+    return (column_headers, data)
 
 
 class CreateVolumeAttachment(command.ShowOne):

releasenotes/notes/volume-attachment-create-output-fix-56515b8fcdd260b9.yaml

@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    The ``volume attachment create`` command will now display information
+    for successfully created volume attachments. Previously an empty table was
+    returned.