LinkDesk/backend/docs/custom-task-status-migration.md

Custom Task Status Migration - Task 1 Implementation Summary

Overview

Successfully implemented database schema changes and migration to support custom task statuses in the VFX Project Management System.

Changes Made

1. Database Schema Updates

Project Model (backend/models/project.py)

• ✅ Added custom_task_statuses JSON column to store project-specific custom statuses
• Column initialized with empty array [] for all existing projects

Task Model (backend/models/task.py)

• ✅ Changed status field from Enum(TaskStatus) to String
• Updated default value from TaskStatus.NOT_STARTED to "not_started"
• Maintains backward compatibility with existing system statuses

2. Schema Updates (backend/schemas/task.py)

• ✅ Updated TaskBase.status from TaskStatus enum to str type
• ✅ Updated TaskUpdate.status from Optional[TaskStatus] to Optional[str]
• ✅ Updated TaskStatusUpdate.status from TaskStatus to str
• Changed default value to "not_started" (lowercase string)

3. Router Updates

Updated all routers to use string values instead of TaskStatus enum:

Assets Router (backend/routers/assets.py)

• ✅ Changed task creation to use status="not_started"
• ✅ Updated status initialization in task status aggregation
• ✅ Updated status filtering to use string comparison
• ✅ Updated status sorting to use string-based status order

Reviews Router (backend/routers/reviews.py)

• ✅ Updated submission status checks to use "submitted" string
• ✅ Changed approval status update to "approved" string
• ✅ Changed retake status update to "retake" string

Shots Router (backend/routers/shots.py)

• ✅ Changed task creation to use status="not_started"
• ✅ Updated status initialization in task status aggregation
• ✅ Updated status filtering to use string comparison
• ✅ Updated status sorting to use string-based status order

4. Migration Script (backend/migrate_custom_task_statuses.py)

Created comprehensive migration script that:

• ✅ Adds custom_task_statuses column to projects table
• ✅ Initializes column with empty array [] for existing projects
• ✅ Converts existing uppercase enum values to lowercase strings:
  • NOT_STARTED → not_started
  • IN_PROGRESS → in_progress
  • SUBMITTED → submitted
  • APPROVED → approved
  • RETAKE → retake
• ✅ Provides detailed logging of conversion process
• ✅ Includes verification steps

5. Test Script (backend/test_custom_task_status_migration.py)

Created verification test that confirms:

• ✅ custom_task_statuses column exists in projects table
• ✅ Task status column supports string values
• ✅ All existing task statuses are valid lowercase strings
• ✅ custom_task_statuses is initialized as empty array
• ✅ Displays task status distribution

Migration Results

Database Changes

Projects Table:
- Added column: custom_task_statuses (TEXT/JSON)

Tasks Table:
- Status column: VARCHAR(11) (already TEXT, no change needed)

Data Conversion

Successfully converted 105 tasks:

• 91 tasks: NOT_STARTED → not_started
• 9 tasks: IN_PROGRESS → in_progress
• 4 tasks: RETAKE → retake
• 1 task: APPROVED → approved

System Status Values

The following system statuses remain available:

• not_started - Task has not been started
• in_progress - Task is currently being worked on
• submitted - Task work has been submitted for review
• approved - Task has been approved
• retake - Task requires revisions

Backward Compatibility

• ✅ All existing tasks continue to work with lowercase string statuses
• ✅ System statuses are always available across all projects
• ✅ No breaking changes to existing API endpoints
• ✅ Frontend can continue using existing status values

Next Steps

With the database schema and migration complete, the system is ready for:

1. Backend API endpoints for custom status CRUD operations (Task 2-8)
2. Frontend components for custom status management (Task 10-21)
3. Integration with task creation and status update workflows

Testing

All tests passed successfully:

• ✅ Backend imports without errors
• ✅ Database schema verification
• ✅ Data conversion verification
• ✅ Status value validation

Requirements Validated

• ✅ Requirement 6.1: System statuses remain available
• ✅ Requirement 6.2: Backward compatibility maintained
• ✅ Requirement 6.3: Existing tasks continue to work
• ✅ Requirement 9.1: Database schema supports custom statuses