Resolved FastAPI 422 Error and Improved API Integration

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📅 2025-04-12 — Session: Resolved FastAPI 422 Error and Improved API Integration

🕒 01:20–01:50
🏷️ Labels: Fastapi, Api Integration, Error Handling, Frontend, Backend
📂 Project: Dev
⭐ Priority: MEDIUM

Session Goal

The primary goal of this session was to resolve the 422 Unprocessable Entity error in a FastAPI application and improve the integration between frontend and backend systems.

Key Activities

  1. Fixing 422 Error: Identified the cause of the 422 Unprocessable Entity error, which was due to the frontend sending a file path instead of file content. Proposed solutions included modifying the frontend to send file content or adjusting the backend to accept file paths.
  2. Frontend Payload Adjustment: Corrected the frontend payload to ensure compatibility with the backend by sending the correct file path.
  3. File Handling Strategies: Evaluated strategies for handling file uploads in APIs, considering the pros and cons of sending file paths versus file content.
  4. Flow Execution Integration: Integrated a flow execution feature into the Code Review Page using React and TypeScript, with necessary backend adjustments.
  5. Analysis and Optimization: Analyzed the runFlow function for improvements in error handling and performance.
  6. Model Update: Updated the FastAPI FlowRequest model to handle both text and path inputs, enhancing error handling.
  7. Debugging: Conducted a thorough debugging session to ensure the FastAPI application handles requests correctly, focusing on the FlowRequest model.

Achievements

  • Successfully resolved the 422 Unprocessable Entity error.
  • Improved the integration between frontend and backend systems.
  • Enhanced error handling and performance in the API.

Pending Tasks

  • Further testing of the updated API integration to ensure stability.
  • Implementation of the selected file handling strategy in production.

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