https://ollieread.com/articles/a-minimal-identity-map-for-laravel-eloquent

Implementation pattern (not a package) that ensures each database row has a unique representation in memory. Multiple queries for the same row return the identical object instance rather than separate copies.

## Problem Solved
Without an identity map, Eloquent creates multiple instances of the same database row. If you update a User model in one place, changes are not reflected in other places holding a different instance of the same row.

## How It Works
- Static registry stores model instances mapped by class name and primary key
- Hooks capture newly queried models via `newFromBuilder()`
- Freshly created models added via the `created` event
- Deleted models removed via `deleting`/`forceDeleting` events
- Subsequent queries update existing instances rather than creating duplicates

#laravel #eloquent #pattern #identity-map #orm #caching #memory