Fix handling the use_default_subnet_pool attribute

The attribute formerly wasn't working because it is lacking support in
the SDK. The patch to add it[1] introduced a modified spelling, so we
should be matching this here.

Also make sure that the attribute is not shown when displaying subnet
objects, as it is meant to be invisible[2].

[1] I72c0be77d96f3891748cdd69c382211dc20dbf5e
[2] http://git.openstack.org/cgit/openstack/neutron/tree/neutron/extensions/default_subnetpools.py#n23

Change-Id: Ic125b818a6082d76a1114fe89e0b1fcf4c7356b0
Partial-Bug: 1668223

openstackclient/network/sdk_utils.py

@@ -13,8 +13,24 @@
 import six
 
 
-# Get the OSC show command display and attribute columns for an SDK resource.
-def get_osc_show_columns_for_sdk_resource(sdk_resource, osc_column_map):
+def get_osc_show_columns_for_sdk_resource(
+    sdk_resource,
+    osc_column_map,
+    invisible_columns=[]
+):
+    """Get and filter the display and attribute columns for an SDK resource.
+
+    Common utility function for preparing the output of an OSC show command.
+    Some of the columns may need to get renamed, others made invisible.
+
+    :param sdk_resource: An SDK resource
+    :param osc_column_map: A hash of mappings for display column names
+    :param invisible_columns: A list of invisible column names
+
+    :returns: Two tuples containing the names of the display and attribute
+              columns
+    """
+
     if getattr(sdk_resource, 'allow_get', None) is not None:
         resource_dict = sdk_resource.to_dict(
             body=True, headers=False, ignore_none=False)
@@ -24,6 +40,9 @@ def get_osc_show_columns_for_sdk_resource(sdk_resource, osc_column_map):
     # Build the OSC column names to display for the SDK resource.
     attr_map = {}
     display_columns = list(resource_dict.keys())
+    for col_name in invisible_columns:
+        if col_name in display_columns:
+            display_columns.remove(col_name)
     for sdk_attr, osc_attr in six.iteritems(osc_column_map):
         if sdk_attr in display_columns:
             attr_map[osc_attr] = sdk_attr

openstackclient/network/v2/subnet.py

@@ -132,7 +132,13 @@ def _get_columns(item):
         'subnet_pool_id': 'subnetpool_id',
         'tenant_id': 'project_id',
     }
-    return sdk_utils.get_osc_show_columns_for_sdk_resource(item, column_map)
+    # Do not show this column when displaying a subnet
+    invisible_columns = ['use_default_subnetpool']
+    return sdk_utils.get_osc_show_columns_for_sdk_resource(
+        item,
+        column_map,
+        invisible_columns=invisible_columns
+    )
 
 
 def convert_entries_to_nexthop(entries):
@@ -179,7 +185,7 @@ def _get_attrs(client_manager, parsed_args, is_create=True):
                                                   ignore_missing=False)
             attrs['subnetpool_id'] = subnet_pool.id
         if parsed_args.use_default_subnet_pool:
-            attrs['use_default_subnetpool'] = True
+            attrs['use_default_subnet_pool'] = True
         if parsed_args.prefix_length is not None:
             attrs['prefixlen'] = parsed_args.prefix_length
         if parsed_args.subnet_range is not None: