Enhance a data route error handling regression

[fulleni]

Status

READY/IN DEVELOPMENT/HOLD

Description

Type of Change

• ✨ New feature (non-breaking change which adds functionality)
• 🛠️ Bug fix (non-breaking change which fixes an issue)
• ❌ Breaking change (fix or feature that would cause existing functionality to change)
• 🧹 Code refactor
• ✅ Build configuration change
• 📝 Documentation
• 🗑️ Chore

[gemini-code-assist]

Summary of Changes

Hello @fulleni, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

I've implemented several enhancements to the error handling across various data API routes to address a regression and improve the overall robustness and user-friendliness of the API. The primary goal is to provide more specific and actionable error messages to clients when requests are malformed or contain invalid data, rather than allowing unhandled exceptions or generic server errors. This involves adding try-catch blocks around data parsing and type conversion operations, ensuring that common issues like invalid JSON, incorrect query parameter formats, or unexpected data types are caught and reported clearly.

Highlights

• Improved ID extraction robustness in PUT requests: I've enhanced the _handlePut function in routes/api/v1/data/[id]/index.dart to be more resilient when processing incoming data. Specifically, the logic for extracting an item's ID from the request body (modelConfig.getId) is now wrapped in a try-catch block. This prevents an immediate BadRequestException if the ID isn't present or causes an error during extraction, allowing for more flexible model handling.
• Enhanced type safety for user content preferences updates: I've added a crucial type check within the _handlePut function for user_content_preferences models. Before attempting to update user preferences, the itemToUpdate is now explicitly checked to ensure it is of type UserContentPreferences. This prevents runtime errors and provides a clear OperationFailedException if an incorrect type is passed, improving internal consistency and error reporting.
• More robust query parameter parsing in GET requests: I've significantly improved error handling for query parameters in the _handleGet function within routes/api/v1/data/index.dart. The parsing of both 'filter' (JSON) and 'sort' parameters is now enclosed in try-catch blocks. This ensures that malformed or invalid parameter values result in specific BadRequestException responses, providing clearer feedback to API consumers rather than generic server errors.
• Better error handling for invalid request bodies in POST requests: I've made the _handlePost function in routes/api/v1/data/index.dart more resilient to invalid request bodies. The modelConfig.fromJson call, which converts the request body into a model instance, is now wrapped in a try-catch block. This allows the API to gracefully handle TypeError exceptions that might arise from missing or malformed fields in the incoming JSON, returning a BadRequestException to the client.

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[gemini-code-assist]

Code Review

This pull request improves error handling in the data routes, making them more robust against invalid client input. The changes introduce try-catch blocks to handle potential parsing errors for filter, sort, and request body parameters, preventing server crashes. My review focuses on further refining this new error handling to improve security and debuggability. Specifically, I've suggested avoiding leaking exception details to the client and ensuring that caught exceptions are not overly broad or silently ignored.