YModelError: Value "None" does not satisfy the constraint

[ldacol]

Hello,

I am getting the following error

Traceback (most recent call last):
  File "convert.py", line 54, in <module>
    print(yang_yaml_to_xml(ARGS['yaml_file']))
  File "convert.py", line 40, in yang_yaml_to_xml
    yang_xml = CODEC.encode(XML_PROVIDER, decoded_json_yang)
  File "/opt/cteneteng/lib/python3.6/site-packages/ydk/errors/error_handler.py", line 112, in helper
    return func(self, provider, entity, *args, **kwargs)
  File "/opt/cteneteng/lib/python3.6/site-packages/ydk/services/codec_service.py", line 78, in encode
    return self._encode(provider, entity_holder, pretty, subtree)
  File "/opt/cteneteng/lib/python3.6/site-packages/ydk/services/codec_service.py", line 110, in _encode
    return result
  File "/export/apps/python/3.6.9/lib/python3.6/contextlib.py", line 99, in __exit__
    self.gen.throw(type, value, traceback)
  File "/opt/cteneteng/lib/python3.6/site-packages/ydk/errors/error_handler.py", line 82, in handle_runtime_error
    _raise(_exc)
  File "/opt/cteneteng/lib/python3.6/site-packages/ydk/errors/error_handler.py", line 54, in _raise
    exec("raise exc from None")
  File "<string>", line 1, in <module>
ydk.errors.YModelError:  Value "None" does not satisfy the constraint "([0-9]+\.\.[0-9]+)|exact" (range, length, or pattern). Path: /openconfig-routing-policy:routing-policy/defined-sets/prefix-sets/prefix-set[name='DEFAULT']/prefixes/prefix[ip-prefix='0.0.0.0/0'][masklength-range='None']/masklength-range

whilst running a python code to decode yang yaml into xml below snippet of configuration. Running ydk_models_openconfig-0.1.8-py3.6 models and libydk-0.8.5-1. Any assistance appreciated

Thanks and regards

Luca

---
openconfig-routing-policy:routing-policy:
  policy-definitions:
    policy-definition:
      - name: TEST-1-EXPORT-IPV4
        statements:
          statement:
            - name: NEXT-HOP-SELF
              conditions:
                config:
                  install-protocol-eq: openconfig-policy-types:BGP
              actions:
                openconfig-bgp-policy:bgp-actions:
                  config:
                    set-next-hop: 10.0.0.1
      - name: TEST-2-EXPORT-IPV4
        statements:
          statement:
            - name: AGGREGATE-ACCEPT
              conditions:
                config:
                  install-protocol-eq: openconfig-policy-types:LOCAL_AGGREGATE
              actions:
                config:
                  policy-result: ACCEPT_ROUTE
      - name: TEST-1-IMPORT-IPV4
        statements:
          statement:
            - name: DEFAULT-REJECT
              conditions:
                match-prefix-set:
                  config:
                    prefix-set: DEFAULT
              actions:
                config:
                  policy-result: ACCEPT_ROUTE
  defined-sets:
    prefix-sets:
      prefix-set:
        - name: DEFAULT
          prefixes:
            prefix:
               - ip-prefix: 0.0.0.0/0
               - masklength-range: exact

[ygorelik]

That looks like a bug in libyang library code. Could you please open new issue here.

In the meantime I would suggest you use XmlSubtreeCodec, which skips data value validation.

Yan Gorelik

[ldacol]

Submitted new issue to GitHub.

Thanks for the quick reply and workaround.

Luca