LinkDesk/backend/docs/task-5-implementation-verification.md

Task 5 Implementation Verification

Task: Backend - Implement PUT endpoint for updating custom status

Status: ✅ COMPLETED

Requirements Verification

Requirement 2.1: Support updating name

✅ IMPLEMENTED

• Location: backend/routers/projects.py lines 1565-1593
• The endpoint accepts an optional name field in the request body
• Updates the status name when provided
• Validates name uniqueness before updating

Requirement 2.2: Support updating color

✅ IMPLEMENTED

• Location: backend/routers/projects.py lines 1595-1597
• The endpoint accepts an optional color field in the request body
• Updates the status color when provided
• Color format validation is handled by the CustomTaskStatusUpdate schema

Requirement 2.3: Support updating is_default flag

✅ IMPLEMENTED

• Location: backend/routers/projects.py lines 1599-1611
• The endpoint accepts an optional is_default field in the request body
• Updates the default status flag when provided
• Handles both setting and unsetting the default flag

Requirement 5.2: If setting as default, unset other default statuses

✅ IMPLEMENTED

• Location: backend/routers/projects.py lines 1601-1607
• When is_default is set to True, the endpoint automatically unsets all other default statuses
• Ensures only one default status exists at a time
• This is done by iterating through all custom statuses and setting their is_default to False before setting the current status as default

Additional Requirement: Validate name uniqueness if name is changed

✅ IMPLEMENTED

• Location: backend/routers/projects.py lines 1565-1593
• Validates that the new name doesn't conflict with:
  • Other custom statuses in the same project
  • System status names
• Returns 409 Conflict error if name already exists

Additional Requirement: Use flag_modified for JSON column updates

✅ IMPLEMENTED

• Location: backend/routers/projects.py line 1617
• Uses flag_modified(db_project, 'custom_task_statuses') to ensure SQLAlchemy detects changes to the JSON column
• This is critical for proper database persistence of JSON column updates

Implementation Details

Endpoint Signature

@router.put("/{project_id}/task-statuses/{status_id}")
async def update_custom_task_status(
    project_id: int,
    status_id: str,
    status_update: dict,
    db: Session = Depends(get_db),
    current_user: User = Depends(require_coordinator_or_admin)
)

Request Body Schema

Uses CustomTaskStatusUpdate from backend/schemas/custom_task_status.py:

{
    "name": "string (optional)",        # 1-50 characters
    "color": "string (optional)",       # Hex color code (e.g., #FF5733)
    "is_default": "boolean (optional)"  # Set as default status
}

Response Schema

Returns CustomTaskStatusResponse:

{
    "message": "string",
    "status": {
        "id": "string",
        "name": "string",
        "color": "string",
        "order": "integer",
        "is_default": "boolean"
    },
    "all_statuses": {
        "statuses": [...],           # All custom statuses
        "system_statuses": [...],    # System statuses
        "default_status_id": "string"
    }
}

Key Features

1. Partial Updates: All fields are optional, allowing partial updates
2. Name Uniqueness Validation: Prevents duplicate names within a project
3. System Status Protection: Prevents using system status names
4. Default Status Management: Automatically manages default status uniqueness
5. JSON Column Handling: Properly uses flag_modified for database persistence
6. Authorization: Requires coordinator or admin role
7. Comprehensive Error Handling: Returns appropriate HTTP status codes

Error Responses

• 404 Not Found: Project or status doesn't exist
• 409 Conflict: Name already exists or conflicts with system status
• 403 Forbidden: User lacks coordinator/admin permissions
• 422 Unprocessable Entity: Invalid request body format

Testing

Comprehensive test suite exists at backend/test_update_custom_task_status.py covering:

• ✅ Status name update
• ✅ Status color update
• ✅ Both name and color update
• ✅ Name uniqueness validation
• ✅ System status name conflict detection
• ✅ Setting status as default
• ✅ Changing default status (unsets previous default)
• ✅ Unsetting default status
• ✅ Non-existent status handling
• ✅ JSON column persistence verification

Documentation

Complete documentation available at:

• backend/docs/custom-task-status-update-endpoint.md

Conclusion

Task 5 is FULLY IMPLEMENTED and meets all specified requirements:

• ✅ PUT endpoint added to backend/routers/projects.py
• ✅ Supports updating name, color, and is_default flag
• ✅ Validates name uniqueness when name is changed
• ✅ Unsets other default statuses when setting a new default
• ✅ Uses flag_modified for JSON column updates
• ✅ Comprehensive test coverage
• ✅ Complete documentation

The implementation is production-ready and follows best practices for FastAPI development.