thrilltrack-explorer/django-backend/PHASE_2_ENTITY_SUBMISSION_SERVICES_COMPLETE.md

Phase 2: Entity Submission Services - COMPLETE ✅

Date: January 8, 2025
Phase Duration: ~8 hours
Status: ✅ COMPLETE

Overview

Phase 2 successfully implemented entity submission services for all entity types (Parks, Rides, Companies, RideModels), establishing the foundation for Sacred Pipeline enforcement across the ThrillWiki backend.

What Was Completed

Task 2.1: BaseEntitySubmissionService ✅

File Created: django/apps/entities/services/__init__.py

Key Features:

• Abstract base class for all entity submission services
• Generic create_entity_submission() method
• Generic update_entity_submission() method
• Moderator bypass logic (auto-approves for users with moderator role)
• Atomic transaction support (@transaction.atomic)
• Comprehensive logging at all steps
• Submission item building from entity data
• Placeholder entity creation for ContentSubmission reference
• Foreign key handling in moderator bypass

Design Decisions:

• Placeholder entities created immediately (required by ContentSubmission)
• Moderator bypass auto-approves and populates entity
• Non-moderators get submission in pending queue
• Comprehensive error handling with rollback on failure

Task 2.2: ParkSubmissionService ✅

File Created: django/apps/entities/services/park_submission.py

Configuration:

entity_model = Park
entity_type_name = 'Park'
required_fields = ['name', 'park_type']

Special Handling:

• Geographic coordinates (latitude/longitude)
• Uses Park.set_location() method for PostGIS/SQLite compatibility
• Coordinates set after moderator bypass entity creation

Example Usage:

from apps.entities.services.park_submission import ParkSubmissionService

submission, park = ParkSubmissionService.create_entity_submission(
    user=request.user,
    data={
        'name': 'Cedar Point',
        'park_type': 'theme_park',
        'latitude': Decimal('41.4792'),
        'longitude': Decimal('-82.6839')
    },
    source='api'
)

Task 2.3: RideSubmissionService ✅

File Created: django/apps/entities/services/ride_submission.py

Configuration:

entity_model = Ride
entity_type_name = 'Ride'
required_fields = ['name', 'park', 'ride_category']

Special Handling:

• Park foreign key (required) - accepts Park instance or UUID string
• Manufacturer foreign key (optional) - accepts Company instance or UUID string
• Ride model foreign key (optional) - accepts RideModel instance or UUID string
• Validates and normalizes FK relationships before submission

Example Usage:

from apps.entities.services.ride_submission import RideSubmissionService

park = Park.objects.get(slug='cedar-point')

submission, ride = RideSubmissionService.create_entity_submission(
    user=request.user,
    data={
        'name': 'Steel Vengeance',
        'park': park,
        'ride_category': 'roller_coaster',
        'height': Decimal('205')
    },
    source='api'
)

Task 2.4: CompanySubmissionService ✅

File Created: django/apps/entities/services/company_submission.py

Configuration:

entity_model = Company
entity_type_name = 'Company'
required_fields = ['name']

Special Handling:

• Location foreign key (optional) - accepts Locality instance or UUID string
• JSONField Warning: company_types field uses JSONField which violates project rules
  • TODO: Convert to Many-to-Many relationship
  • Warning logged on every submission with company_types

Example Usage:

from apps.entities.services.company_submission import CompanySubmissionService

submission, company = CompanySubmissionService.create_entity_submission(
    user=request.user,
    data={
        'name': 'Bolliger & Mabillard',
        'company_types': ['manufacturer', 'designer'],
        'website': 'https://www.bolliger-mabillard.com'
    },
    source='api'
)

Task 2.5: RideModelSubmissionService ✅

File Created: django/apps/entities/services/ride_model_submission.py

Configuration:

entity_model = RideModel
entity_type_name = 'RideModel'
required_fields = ['name', 'manufacturer', 'model_type']

Special Handling:

• Manufacturer foreign key (required) - accepts Company instance or UUID string
• Validates manufacturer exists before creating submission

Example Usage:

from apps.entities.services.ride_model_submission import RideModelSubmissionService

manufacturer = Company.objects.get(name='Bolliger & Mabillard')

submission, model = RideModelSubmissionService.create_entity_submission(
    user=request.user,
    data={
        'name': 'Inverted Coaster',
        'manufacturer': manufacturer,
        'model_type': 'coaster_model',
        'typical_height': Decimal('120')
    },
    source='api'
)

Architecture Summary

Inheritance Hierarchy

BaseEntitySubmissionService (abstract)
├── ParkSubmissionService
├── RideSubmissionService
├── CompanySubmissionService
└── RideModelSubmissionService

Workflow Flow

For Regular Users:

1. User submits entity data → Service validates required fields
2. Service creates placeholder entity with required fields only
3. Service builds SubmissionItems for all provided fields
4. Service creates ContentSubmission via ModerationService
5. ContentSubmission enters pending queue (status='pending')
6. Returns (submission, None) - entity is None until approval

For Moderators:

1. User submits entity data → Service validates required fields
2. Service creates placeholder entity with required fields only
3. Service builds SubmissionItems for all provided fields
4. Service creates ContentSubmission via ModerationService
5. Service auto-approves submission via ModerationService
6. Service populates entity with all approved fields
7. Entity saved to database
8. Returns (submission, entity) - entity is fully populated

Key Features Implemented

✅ Moderator Bypass

• Detects moderator role via user.role.is_moderator
• Auto-approves submissions for moderators
• Immediately creates entities with all fields

✅ Atomic Transactions

• All operations use @transaction.atomic
• Rollback on any failure
• Placeholder entities deleted if submission creation fails

✅ Comprehensive Logging

• logger.info() at every major step
• Tracks user, moderator status, field count
• Logs submission ID, entity ID, status transitions

✅ Submission Items

• Each field tracked as separate SubmissionItem
• Supports selective approval (not yet implemented in endpoints)
• old_value=None for create operations
• change_type='add' for all fields

✅ Foreign Key Handling

• Accepts both model instances and UUID strings
• Validates FK relationships before submission
• Converts UUIDs to instances when needed

✅ Placeholder Entities

• Created immediately with required fields only
• Satisfies ContentSubmission.entity requirement
• Populated with all fields after approval (moderators)
• Tracked by pghistory from creation

Integration with Existing Systems

With ModerationService

• Uses ModerationService.create_submission() for all submissions
• Uses ModerationService.approve_submission() for moderator bypass
• Respects FSM state transitions
• Integrates with 15-minute lock mechanism

With pghistory

• All entity changes automatically tracked
• Placeholder creation tracked
• Field updates on approval tracked
• Full audit trail maintained

With Email Notifications

• Celery tasks triggered by ModerationService
• Approval/rejection emails sent automatically
• No additional configuration needed

Files Created

django/apps/entities/services/
├── __init__.py                      # BaseEntitySubmissionService
├── park_submission.py               # ParkSubmissionService
├── ride_submission.py               # RideSubmissionService
├── company_submission.py            # CompanySubmissionService
└── ride_model_submission.py         # RideModelSubmissionService

Total Lines: ~750 lines of code Documentation: Comprehensive docstrings for all classes and methods

Testing Status

⚠️ Manual Testing Required (Phase 4)

• Unit tests not yet created
• Integration tests not yet created
• Manual API testing pending

Known Issues

1. Company.company_types JSONField ⚠️

   • Violates project rule: "NEVER use JSON/JSONB in SQL"
   • Should be converted to Many-to-Many relationship
   • Warning logged on every company submission
   • TODO: Create CompanyType model and M2M relationship

2. API Endpoints Not Updated ⚠️

   • Endpoints still use direct model.objects.create()
   • Phase 3 will update all entity creation endpoints
   • Current endpoints bypass Sacred Pipeline

Next Steps (Phase 3)

Phase 3 will update API endpoints to use the new submission services:

1. Update django/api/v1/endpoints/parks.py

   • Replace direct Park.objects.create()
   • Use ParkSubmissionService.create_entity_submission()
   • Handle (submission, park) tuple return

2. Update django/api/v1/endpoints/rides.py

   • Replace direct Ride.objects.create()
   • Use RideSubmissionService.create_entity_submission()
   • Handle FK normalization

3. Update django/api/v1/endpoints/companies.py

   • Replace direct Company.objects.create()
   • Use CompanySubmissionService.create_entity_submission()

4. Update django/api/v1/endpoints/ride_models.py

   • Replace direct RideModel.objects.create()
   • Use RideModelSubmissionService.create_entity_submission()

Success Criteria - All Met ✅

• BaseEntitySubmissionService created with all required features
• All 4 entity services created (Park, Ride, Company, RideModel)
• Each service follows ReviewSubmissionService pattern
• Moderator bypass implemented in all services
• Proper logging added throughout
• Foreign key handling implemented
• Special cases handled (coordinates, JSONField warning)
• Comprehensive documentation provided
• Code compiles without syntax errors

Conclusion

Phase 2 successfully established the Sacred Pipeline infrastructure for all entity types. The services are ready for integration with API endpoints (Phase 3). All services follow consistent patterns, include comprehensive logging, and support both regular users and moderator bypass workflows.

Phase 2 Duration: ~8 hours (as estimated)
Phase 2 Status: ✅ COMPLETE

Ready for Phase 3: Update API Endpoints (4-5 hours)