demo storing label as custom property with empty string value

[tarilabs]

In this demo,

• RegisteredModel gets labels: my-label1, my-label2
• ModelVersion gets labels: my-label3, my-label4
• ModelArtifact gets labels: my-label5, my-label6

Description

Custom property of type string, with empty string value, shall be considered a Label; this is also semantically compatible for properties having empty string values in general.

How Has This Been Tested?

robot test/robot/UserStory.robot

Behind the scenes, request payload is exercised as:

POST Request : url=http://localhost:8080/api/model_registry/v1alpha3/registered_models 
 path_url=/api/model_registry/v1alpha3/registered_models 
 headers={'User-Agent': 'python-requests/2.31.0', 'Accept-Encoding': 'gzip, deflate', 'Accept': '*/*', 'Connection': 'keep-alive', 'Content-Length': '235', 'Content-Type': 'application/json'} 
 body=b'{"name": "GkfjQxwk", "description": "Lorem ipsum dolor sit amet", "customProperties": {"my-label1": {"string_value": "", "metadataType": "MetadataStringValue"}, "my-label2": {"string_value": "", "metadataType": "MetadataStringValue"}}}' 

So we can notice this takes the general form of:

{
..., 
"customProperties":
  { "my-label1": {"string_value": "", "metadataType": "MetadataStringValue"}, 
    ...

And analogous response:

POST Response : url=http://localhost:8080/api/model_registry/v1alpha3/registered_models 
 status=201, reason=Created 
 headers={'Content-Type': 'application/json; charset=UTF-8', 'Vary': 'Origin', 'Date': 'Wed, 03 Apr 2024 06:36:10 GMT', 'Content-Length': '314'} 
 body={"createTimeSinceEpoch":"1712126170473","customProperties":{"my-label1":{"metadataType":"MetadataStringValue","string_value":""},"my-label2":{"metadataType":"MetadataStringValue","string_value":""}},"description":"Lorem ipsum dolor sit amet","id":"36","lastUpdateTimeSinceEpoch":"1712126170473","name":"GkfjQxwk"}

Resulting in:

as expected.

References:

• Model labels in the openapi models opendatahub-io/model-registry-bf4-kf#151
• https://issues.redhat.com/browse/RHOAIENG-893

Merge criteria:

• The commits and have meaningful messages; the author will squash them after approval or will ask to merge with squash.
• [n/a] Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has manually tested the changes and verified that the changes work

[dhirajsb]

/lgtm

[google-oss-prow]

@dhirajsb: changing LGTM is restricted to collaborators

In response to this:

/lgtm

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[rareddy]

/approve
/lgtm

[google-oss-prow]

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