# Phase 4: Entity Updates Through Sacred Pipeline - COMPLETE

**Date:** 2025-11-08  
**Status:** ✅ Complete  
**Previous Phase:** [Phase 3 - API Endpoints Creation](PHASE_3_API_ENDPOINTS_SACRED_PIPELINE_COMPLETE.md)

## Overview

Phase 4 successfully routes all entity UPDATE operations (PUT/PATCH endpoints) through the Sacred Pipeline by integrating them with the submission services created in Phase 2.

## Objectives Achieved

✅ All PUT endpoints now use `update_entity_submission()`  
✅ All PATCH endpoints now use `update_entity_submission()`  
✅ No direct `.save()` calls in update endpoints  
✅ Authentication required on all update endpoints  
✅ Moderators get 200 responses with updated entities  
✅ Regular users get 202 responses with submission IDs  
✅ Error handling for ValidationErrors  
✅ Comprehensive logging throughout  
✅ Response schemas updated for 202 status  

## Changes Made

### 1. Parks Endpoints (`django/api/v1/endpoints/parks.py`)

#### update_park() - PUT Endpoint
**Before:**
```python
@router.put("/{park_id}", ...)
def update_park(request, park_id: UUID, payload: ParkUpdate):
    park = get_object_or_404(Park, id=park_id)
    # ... coordinate handling
    park.save()  # ❌ DIRECT SAVE
    return park
```

**After:**
```python
@router.put("/{park_id}", 
    response={200: ParkOut, 202: dict, 404: ErrorResponse, 400: ErrorResponse, 401: ErrorResponse}, ...)
@require_auth
def update_park(request, park_id: UUID, payload: ParkUpdate):
    user = request.auth
    park = get_object_or_404(Park, id=park_id)
    
    submission, updated_park = ParkSubmissionService.update_entity_submission(
        entity=park,
        user=user,
        update_data=data,
        latitude=latitude,
        longitude=longitude,
        source='api',
        ip_address=request.META.get('REMOTE_ADDR'),
        user_agent=request.META.get('HTTP_USER_AGENT', '')
    )
    
    if updated_park:  # Moderator
        return 200, updated_park
    else:  # Regular user
        return 202, {'submission_id': str(submission.id), ...}
```

#### partial_update_park() - PATCH Endpoint
- Same pattern as PUT
- Uses `exclude_unset=True` to update only provided fields
- Flows through Sacred Pipeline

### 2. Rides Endpoints (`django/api/v1/endpoints/rides.py`)

#### update_ride() - PUT Endpoint
**Changes:**
- Added `@require_auth` decorator
- Replaced direct `.save()` with `RideSubmissionService.update_entity_submission()`
- Added dual response pattern (200 for moderators, 202 for users)
- Updated response schema to include 202 status
- Added comprehensive error handling
- Added logging for all operations

#### partial_update_ride() - PATCH Endpoint
- Same pattern as PUT
- Properly handles partial updates

### 3. Companies Endpoints (`django/api/v1/endpoints/companies.py`)

#### update_company() - PUT Endpoint
**Changes:**
- Added `@require_auth` decorator
- Replaced direct `.save()` with `CompanySubmissionService.update_entity_submission()`
- Added dual response pattern
- Updated response schema
- Added error handling and logging

#### partial_update_company() - PATCH Endpoint
- Same pattern as PUT
- Flows through Sacred Pipeline

### 4. Ride Models Endpoints (`django/api/v1/endpoints/ride_models.py`)

#### update_ride_model() - PUT Endpoint
**Changes:**
- Added `@require_auth` decorator
- Replaced direct `.save()` with `RideModelSubmissionService.update_entity_submission()`
- Added dual response pattern
- Updated response schema
- Added error handling and logging

#### partial_update_ride_model() - PATCH Endpoint
- Same pattern as PUT
- Properly routes through Sacred Pipeline

## Technical Implementation Details

### Authentication Pattern
All update endpoints now require authentication:
```python
@require_auth
def update_entity(request, entity_id: UUID, payload: EntityUpdate):
    user = request.auth  # Authenticated user from JWT
```

### Dual Response Pattern

#### For Moderators (200 OK)
```python
if updated_entity:
    logger.info(f"Entity updated (moderator): {updated_entity.id}")
    return 200, updated_entity
```

#### For Regular Users (202 Accepted)
```python
else:
    logger.info(f"Entity update submission created: {submission.id}")
    return 202, {
        'submission_id': str(submission.id),
        'status': submission.status,
        'message': 'Update pending moderation. You will be notified when approved.'
    }
```

### Error Handling Pattern
```python
try:
    submission, updated_entity = Service.update_entity_submission(...)
    # ... response logic
except ValidationError as e:
    return 400, {'detail': str(e)}
except Exception as e:
    logger.error(f"Error updating entity: {e}")
    return 400, {'detail': str(e)}
```

### Response Schema Updates
All endpoints now include 202 status in their response schemas:
```python
response={200: EntityOut, 202: dict, 404: ErrorResponse, 400: ErrorResponse, 401: ErrorResponse}
```

## Sacred Pipeline Flow

### Update Flow Diagram
```
User Request (PUT/PATCH)
    ↓
@require_auth Decorator
    ↓
Extract user from request.auth
    ↓
Get existing entity
    ↓
Service.update_entity_submission()
    ↓
Is User a Moderator?
    ├─ YES → Apply changes immediately
    │         Return 200 + Updated Entity
    │
    └─ NO  → Create ContentSubmission
              Set status = 'pending'
              Return 202 + Submission ID
              ↓
              [Moderator reviews later]
              ↓
              ModerationService.approve_submission()
              ↓
              Apply changes + Notify user
```

## Verification Checklist

- [x] **Parks**
  - [x] `update_park()` uses submission service
  - [x] `partial_update_park()` uses submission service
  - [x] Special coordinate handling preserved
  
- [x] **Rides**
  - [x] `update_ride()` uses submission service
  - [x] `partial_update_ride()` uses submission service
  
- [x] **Companies**
  - [x] `update_company()` uses submission service
  - [x] `partial_update_company()` uses submission service
  
- [x] **Ride Models**
  - [x] `update_ride_model()` uses submission service
  - [x] `partial_update_ride_model()` uses submission service

- [x] **Common Requirements**
  - [x] All endpoints have `@require_auth` decorator
  - [x] All endpoints use submission services
  - [x] No direct `.save()` calls remain
  - [x] All have dual response pattern (200/202)
  - [x] All have updated response schemas
  - [x] All have error handling
  - [x] All have logging

## Files Modified

1. `django/api/v1/endpoints/parks.py`
   - Updated `update_park()` (line ~260)
   - Updated `partial_update_park()` (line ~330)

2. `django/api/v1/endpoints/rides.py`
   - Updated `update_ride()` (line ~480)
   - Updated `partial_update_ride()` (line ~550)

3. `django/api/v1/endpoints/companies.py`
   - Updated `update_company()` (line ~160)
   - Updated `partial_update_company()` (line ~220)

4. `django/api/v1/endpoints/ride_models.py`
   - Updated `update_ride_model()` (line ~180)
   - Updated `partial_update_ride_model()` (line ~240)

## Testing Recommendations

### Manual Testing Checklist

1. **As a Regular User:**
   - [ ] PUT/PATCH request returns 202 status
   - [ ] Response includes submission_id
   - [ ] ContentSubmission created with status='pending'
   - [ ] Entity remains unchanged until approval
   - [ ] User receives notification after approval

2. **As a Moderator:**
   - [ ] PUT/PATCH request returns 200 status
   - [ ] Response includes updated entity
   - [ ] Changes applied immediately
   - [ ] No submission created (bypass moderation)
   - [ ] History event created

3. **Error Cases:**
   - [ ] 401 if not authenticated
   - [ ] 404 if entity doesn't exist
   - [ ] 400 for validation errors
   - [ ] Proper error messages returned

### API Testing Examples

#### Update as Regular User
```bash
curl -X PUT http://localhost:8000/api/v1/parks/{park_id} \
  -H "Authorization: Bearer {user_token}" \
  -H "Content-Type: application/json" \
  -d '{"name": "Updated Park Name"}'

# Expected: 202 Accepted
# {
#   "submission_id": "uuid",
#   "status": "pending",
#   "message": "Park update pending moderation..."
# }
```

#### Update as Moderator
```bash
curl -X PUT http://localhost:8000/api/v1/parks/{park_id} \
  -H "Authorization: Bearer {moderator_token}" \
  -H "Content-Type: application/json" \
  -d '{"name": "Updated Park Name"}'

# Expected: 200 OK
# {
#   "id": "uuid",
#   "name": "Updated Park Name",
#   ...
# }
```

## Benefits Achieved

### 1. **Content Quality Control**
All entity updates now go through moderation (for regular users), ensuring content quality and preventing vandalism.

### 2. **Audit Trail**
Every update creates a ContentSubmission record, providing complete audit trail of who requested what changes and when.

### 3. **Moderator Efficiency**
Moderators can still make instant updates while regular user updates queue for review.

### 4. **Consistent Architecture**
Updates now follow the same pattern as creation (Phase 3), maintaining architectural consistency.

### 5. **User Transparency**
Users receive clear feedback about whether their changes were applied immediately or queued for review.

## Next Steps

### Phase 5: Entity Deletions Through Pipeline (Future)
- Route DELETE endpoints through submission service
- Handle soft deletes vs hard deletes
- Implement delete approval workflow

### Immediate Priorities
1. Test all update endpoints with various user roles
2. Verify ContentSubmission records are created correctly
3. Test moderation approval flow for updates
4. Monitor logs for any issues

## Related Documentation

- [SACRED_PIPELINE_AUDIT_AND_IMPLEMENTATION_PLAN.md](SACRED_PIPELINE_AUDIT_AND_IMPLEMENTATION_PLAN.md) - Overall plan
- [PHASE_1_SACRED_PIPELINE_FIXES_COMPLETE.md](PHASE_1_SACRED_PIPELINE_FIXES_COMPLETE.md) - Foundation fixes
- [PHASE_2_ENTITY_SUBMISSION_SERVICES_COMPLETE.md](PHASE_2_ENTITY_SUBMISSION_SERVICES_COMPLETE.md) - Service layer
- [PHASE_3_API_ENDPOINTS_SACRED_PIPELINE_COMPLETE.md](PHASE_3_API_ENDPOINTS_SACRED_PIPELINE_COMPLETE.md) - Creation endpoints

## Notes

- Parks have special coordinate handling that was preserved
- All services use the `update_entity_submission()` method from BaseEntitySubmissionService
- The implementation maintains backward compatibility for moderators who expect instant updates
- Regular users now have transparency into the moderation process via 202 responses

---

**Phase 4 Status: COMPLETE ✅**

All entity update operations now flow through the Sacred Pipeline, ensuring content quality control and maintaining a complete audit trail of all changes.