# Comment System Architecture Fix

## Required Code Modifications

### 1. Central CommentThread Model (comments/models.py)
```python
from django.contrib.contenttypes.fields import GenericForeignKey, GenericRelation
from django.contrib.contenttypes.models import ContentType
from django.db import models

class CommentThread(models.Model):
    """Centralized comment threading system"""
    content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE)
    object_id = models.PositiveIntegerField()
    content_object = GenericForeignKey()
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        indexes = [
            models.Index(fields=["content_type", "object_id"]),
        ]
        app_label = 'comments'
```

### 2. Model Reference Updates (Example for companies/models.py)
```python
# In all affected models (companies, rides, parks, reviews):
from comments.models import CommentThread

class Company(models.Model):
    # ... existing fields ...
    comments = GenericRelation(CommentThread)  # Updated reference
```

### 3. Historical Records Adjustment
```python
# Historical model definitions:
class HistoricalCompany(HistoricalRecords):
    comments = models.ForeignKey(
        'comments.CommentThread',  # Unified reference
        on_delete=models.SET_NULL,
        null=True,
        blank=True
    )
```

## Migration Execution Plan

1. Generate initial comment thread migration:
```bash
./manage.py makemigrations comments --name create_commentthread
```

2. Create dependent migrations for each modified app:
```bash
for app in companies rides parks reviews; do
    ./manage.py makemigrations $app --name update_comment_references
done
```

3. Migration dependency chain:
```python
# In each app's migration file:
dependencies = [
    ('comments', '0001_create_commentthread'),
]
```

## Validation Checklist
- [ ] Run full test suite: `uv test ./manage.py test`
- [ ] Execute system check: `uv run ./manage.py check --deploy`
- [ ] Verify database schema changes in migration files
- [ ] Confirm admin interface comment relationships