Fix: Invalid data type for the value of modes

[waleedabdeen]

Summary

This PR addresses the issue where the modes parameter was being passed as a dictionary rather than a JSON string. This caused a data type mismatch when inserting/updating the step in the database, leading to an error. This resolves issue #2930.

Problem Identification:
The existing code was passing the modes field directly without serializing it to a JSON string. Causing the step insert queries to fail.

Solution:
A single line of code (line 402) has been added in backend/chainlit/sql_alchemy.py::SQLAlchemyDataLayer to serialize the modes parameter to a JSON formatted string before being inserted into the database:

parameters["modes"] = json.dumps(step_dict.get("modes", {}))

Impact:
Fixed the data type issue when interacting with the database.
Ensured that the modes parameter is correctly stored and can be queried in the future.

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Summary by cubic

Serialize the modes field to a JSON string before DB insert/update to fix the data type mismatch that caused step writes to fail.

^{Written for commit 5430cb1. Summary will update on new commits. Review in cubic}

[cubic-dev-ai]

No issues found across 1 file

_{Re-trigger cubic}