Resolved 422 Error in FastAPI with File Handling

• Day: 2025-04-12
• Time: 01:20 to 01:50
• Project: Dev
• Workspace: WP 2: Operational
• Status: Completed
• Priority: MEDIUM
• Assignee: Matías Nehuen Iglesias
• Tags: Fastapi, Error Handling, Api Development, Frontend, Backend

Description

Session Goal

The primary aim of this session was to diagnose and resolve a 422 Unprocessable Entity error occurring in a FastAPI application due to incorrect file handling in API requests.

Key Activities

• Error Diagnosis: Identified that the error was caused by sending a file path instead of file content in the POST request.
• Frontend Fixes: Updated the frontend to correctly send the file path in the payload, ensuring compatibility with the backend.
• Backend Adjustments: Modified the FastAPI backend to accept both text and path inputs in the Pydantic model, improving error handling and functionality.
• Strategy Evaluation: Evaluated different strategies for file handling in API development, deciding on a default approach for local development.
• Flow Integration: Implemented a flow execution feature in the Code Review Page using React and TypeScript.
• Code Analysis: Analyzed the runFlow function for potential improvements in error handling and performance.

Achievements

• Successfully resolved the 422 Unprocessable Entity error by aligning frontend and backend processes.
• Improved the robustness of the FastAPI application by refining the FlowRequest model.
• Enhanced the code review process with new flow execution capabilities.

Pending Tasks

• Further testing of the new file handling strategy in different environments.
• Continuous monitoring and optimization of the runFlow function for better performance.

Evidence

• source_file=2025-04-12.sessions.jsonl, line_number=8, event_count=0, session_id=e6ea5c5ed7a5feb0c3241d47e6493df63c39e5adc1fa9addda1143f180af6b1d
• event_ids: []