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Implement ride count fields with real-time annotations; update filters and templates for consistency and accuracy
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memory-bank/decisions/ride_count_field.md
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memory-bank/decisions/ride_count_field.md
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# Ride Count Field Implementation
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## Context
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While implementing park views, we encountered an error where a `ride_count` annotation conflicted with an existing model field of the same name. This raised a question about how to handle real-time ride counts versus stored counts.
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## Decision
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We decided to use both approaches but with distinct names:
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1. **Model Field (`ride_count`)**:
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- Kept the original field for backward compatibility
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- Used in test fixtures and filtering system
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- Can serve as a cached/denormalized value
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2. **Annotation (`current_ride_count`)**:
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- Added new annotation with a distinct name
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- Provides real-time count of rides
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- Used in templates for display purposes
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This approach allows us to:
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- Maintain existing functionality in tests and filters
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- Show accurate, real-time counts in the UI
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- Avoid name conflicts between fields and annotations
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## Implementation
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- Kept the `ride_count` IntegerField in the Park model
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- Added `current_ride_count = Count('rides', distinct=True)` annotation in views
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- Updated templates to use `current_ride_count` for display
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## Future Considerations
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We might want to:
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1. Add a periodic task to sync the stored `ride_count` with the computed value
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2. Consider deprecating the stored field if it's not needed for performance
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3. Add validation to ensure the stored count stays in sync with reality
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## Related Files
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- parks/models.py
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- parks/views.py
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- parks/templates/parks/partials/park_list_item.html
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- parks/tests/test_filters.py
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