Save document through upsert_item failed when the document has non-ascii characters

[lidingshan]

• Package Name: azure-cosmos
• Package Version: 4.9.0
• Operating System: macOs 15.4 (Apple M3)
• Python Version: 3.11

Describe the bug
when calling upsert_item to save a document, if the document includes non-ascii characters, an exception will be raised, which is
unsupported Unicode escape sequence

To Reproduce
Steps to reproduce the behavior:

1. Create a test container "Users"
2. Call upsert_item to save data like {"id": "1234", "partitionId": "London", "name": "なかむらし"}

Expected behavior
The document has non-ascii characters that should be saved successfully

Additional context
I believe the root cause is the implementation of _request_body_from_data function in _synchronized_request.py, which should use json.dumps with ensure-ascii=False

[kashifkhan]

Thank you for the feedback @lidingshan. Ill route this to the right folks, who'll get back to you asap.

[github-actions]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @AbhinavTrips @bambriz @Pilchie @pjohari-ms @simorenoh.

[snigdho611-bjit]

+1

[zzulanas]

+1 on this, Running into this issue with our production workloads to save LLM chats with Emojis/unicode chars into Cosmos via the SDK. Please fix this or provide a workaround.

[zzulanas]

I created a PR here which implements the solution that @lidingshan mentioned. Hopefully we can get some traction on this issue as it is quite breaking to a lot of our internal international users of the app. (plus any users who get emojis in their LLM messages)