[NESTJS] Setup Global Exception Filters

[abdegenius]

📌 Task: [NESTJS] Setup Global Exception Filters

📝 Description

We need to implement a Global Exception Filter in our NestJS application to ensure consistent and centralized error handling across all modules. This will help improve maintainability, debuggability, and developer/user experience by standardizing how errors are caught and returned in HTTP responses.

🎯 Goals

• Create a global exception filter that handles:

  • HttpException
  • UnauthorizedException, ForbiddenException, etc.
  • Unhandled exceptions (e.g., uncaught Error)

• Format error responses consistently (e.g., including timestamp, path, status code, error message, etc.)

• Ensure logging is done for critical exceptions (use NestJS logger or a custom logger if applicable)

• Apply the global filter using app.useGlobalFilters() in the main bootstrap file

• Optionally handle and log validation errors from class-validator and class-transformer

📁 Expected Folder/Files

• src/common/filters/http-exception.filter.ts (suggested location)
• main.ts (for global registration)

✅ Acceptance Criteria

• A custom HttpExceptionFilter is created with support for multiple types of exceptions
• The filter provides a standardized JSON response format
• Errors are properly logged (e.g., using Logger.error)
• The filter is registered globally in main.ts
• Unit tests cover common exception scenarios
• Integration test validates behavior on typical endpoints

🔧 Example Response Format

{
  "statusCode": 400,
  "timestamp": "2025-06-03T12:00:00.000Z",
  "path": "/api/example",
  "message": "Bad Request"
}

[shamoo53]

hi , am very experienced with nestjs, express, MongoDB, postgresSQl, python, kindly assign this issue