Error when handling leaf-list of identityref type

[ghost]

Below YDK script using leaf-list of identityref type from openconfig routing-policy model produces the below error:

from ydk.providers import NetconfServiceProvider
from ydk.services import CRUDService

from ydk.models.routing.routing_policy import RoutingPolicy
from ydk.models.bgp.bgp_types import BgpOriginAttrTypeEnum
from ydk.models.bgp.bgp_types import Ipv4UnicastIdentity

ncc = NativeNetconfServiceProvider(address='127.0.0.1' , username='admin', password='admin', port=12022)
crud = CRUDService()

bgp_conditions = RoutingPolicy.PolicyDefinitions.PolicyDefinition.Statements.Statement.Conditions.BgpConditions()
bgp_conditions.med_eq = 100
bgp_conditions.origin_eq = BgpOriginAttrTypeEnum.IGP
bgp_conditions.next_hop_in.append('1.2.3.4')
bgp_conditions.afi_safi_in = Ipv4UnicastIdentity()
bgp_conditions.local_pref_eq = 100
bgp_conditions.route_type = RoutingPolicy.PolicyDefinitions.PolicyDefinition.Statements.Statement.Conditions.BgpConditions.RouteTypeEnum.INTERNAL
conditions = RoutingPolicy.PolicyDefinitions.PolicyDefinition.Statements.Statement.Conditions()
statement = RoutingPolicy.PolicyDefinitions.PolicyDefinition.Statements.Statement()
statement.name = 'Hello'
statements = RoutingPolicy.PolicyDefinitions.PolicyDefinition.Statements()
statements.statement.append(statement)
statements = RoutingPolicy.PolicyDefinitions.PolicyDefinition.Statements()
policy_definition = RoutingPolicy.PolicyDefinitions.PolicyDefinition()
policy_definition.name = 'Hello'
policy_definitions = RoutingPolicy.PolicyDefinitions()
policy_definitions.policy_definition.append(policy_definition)
policy_definitions = RoutingPolicy.PolicyDefinitions()
routing_policy = RoutingPolicy()
policy_definitions.parent = routing_policy
policy_definition.parent = policy_definitions
statements.parent = policy_definition
statement.parent = statements
conditions.parent = statement
bgp_conditions.parent = conditions
crud.create(ncc, bgp_conditions)

ncc.close()

Traceback (most recent call last):
...

    self.crud.create(self.ncc, bgp_conditions)
  File "/ydk-gen/gen-api/python/ydk/services/crud_service.py", line 60, in create
    MetaService.normalize_meta(provider._get_capabilities(), entity)
  File "/ydk-gen/gen-api/python/ydk/services/meta_service.py", line 52, in normalize_meta
    MetaService.inject_imeta(entity, deviation_tables)
  File "/ydk-gen/gen-api/python/ydk/services/meta_service.py", line 96, in inject_imeta
    inject_imeta_helper(entity, deviation_tables)
  File "/ydk-gen/gen-api/python/ydk/services/meta_service.py", line 223, in inject_imeta_helper
    for v in value:
TypeError: 'Ipv4UnicastIdentity' object is not iterable

[ghost]

Another issue is the encoding is not done correctly for leaf-list of identity-ref type. Below is current encoding.

Python code:

bgp_conditions = RoutingPolicy.PolicyDefinitions.PolicyDefinition.Statements.Statement.Conditions.BgpConditions()
bgp_conditions.afi_safi_in.append(Ipv4UnicastIdentity())

Encoding:

              <bgp-conditions xmlns="http://openconfig.net/yang/bgp-policy">

<ipv4-unicast xmlns="http://openconfig.net/yang/bgp-types"/>

                  </bgp-conditions>

This should be like the below:
<afi-safi-in xmlns:idx="http://openconfig.net/yang/bgp-types">idx:ipv4-unicast</afi-safi-in>

[psykokwak4]

The meta data for BgpConditions.afi_safi_in is not generated correctly as REFERENCE_LEAFLIST, see https://github.com/openconfig/public/blob/master/release/models/bgp/openconfig-bgp-policy.yang#L378, https://github.com/CiscoDevNet/ydk-py/blob/master/ydk/models/routing/_meta/_routing_policy.py#L710.