Pymongo async implementation#3
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- Add AsyncGenericReferenceField for references to any document type - Add AsyncCachedReferenceField with denormalized field caching - Add AsyncDeReference for bulk dereferencing to avoid N+1 queries - Add select_related() to AsyncQuerySet for prefetching references - Add comprehensive tests for all async reference features (10 tests)
- Add async_run_in_transaction() for MongoDB transactions with commit/rollback - Add async_switch_db() for switching database aliases - Add async_switch_collection() for switching collections - Add transaction commit retry logic for transient failures - Add comprehensive tests for transactions and context managers (8 tests) - Tests work with MongoDB Atlas (replica set) or skip gracefully on standalone Requires MongoDB 4.0+ replica set or sharded cluster for transactions
- Add AsyncIOOperations for all async database operations - Add async connection management with AsyncMongoClient - Add async session management using contextvars - Separate sync and async I/O operations into io/sync and io/aio - Support PyMongo 4.0+ native async (not Motor)
- Add AsyncDocument with async save(), delete(), reload(), modify() - Add AsyncQuerySet with async iteration and query methods - Add AsyncQuerySetManager for managing querysets - Support async CRUD operations: create, read, update, delete - Support async aggregation: count(), sum(), average(), distinct() - Support async query building: filter(), limit(), skip(), order_by()
- Add test_async_document.py for AsyncDocument CRUD operations - Add test_async_queryset_basic.py for AsyncQuerySet operations - Add test_async_reference_field.py for AsyncReferenceField functionality - All tests use pytest-asyncio for async test execution - Tests cover save, reload, delete, update, queries, and references
- Modify Document base class to support async variants - Modify QuerySet base class to support async variants - Extract shared logic to support both sync and async implementations - Maintain backward compatibility with existing sync API
- Replace MongoDB Atlas connection strings with localhost - Use localhost:27017 for all async transaction tests - Ensures tests work with local MongoDB instances
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…gers and document classes
…nting and dereferencing control
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