Cognitive Search - Index creation doesn't properly set similarity k1 and b options

• Package Name: @azure/search-documents
• Package Version: 11.2.1
• Operating system:
• nodejs
  • version: v16.14.0
• browser
  • name/version:
• typescript
  • version:
• Is the bug related to documentation in
  • README.md
  • source code documentation
  • SDK API docs on https://docs.microsoft.com

Describe the bug Creating a new index with ‘BM25Similarity’ options doesn’t work as expected. The k1 and b options are always set to null.

Example Similarity:

{
  "odatatype": "#Microsoft.Azure.Search.BM25Similarity",
  "b": 0,
  "k1": 0
}

To Reproduce You can use this code sample.

SEARCH_API_KEY='<your-api-key>' SEARCH_API_ENDPOINT='<your-endpoint>' node azure-search-index-similarities-issue.js

Expected behavior The created index’s similarity should equal to the similarity definition at index definition.

Screenshots

Execution output:

❯ node azure-search-index-similarities-issue.js
Running Az Index Similarities Issue Example
Deleting index...
Index similarity: {
  odatatype: '#Microsoft.Azure.Search.BM25Similarity',
  k1: null,
  b: null
}
Deleting index...

[xirzec]

@ka-nikos-oikonomou thank you for your patience and sorry about the delay. There is some unfortunate engineering debt in how Search packages are produced that has introduced complexity in getting out a fix. @dgetu can you comment on what would be a reasonable timeline for hotfixing this?

[ka-nikos-oikonomou]

FYI requesting the same via Rest works as expected. E.g. PUT+the definition above.