feat: add async seeders (AsyncSeeder, AsyncHybridSeeder) - #72
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Bridge the existing sync seeders onto AsyncSession via run_sync, so projects using an async engine can seed without a separate sync engine. The hybrid seeder's mid-traversal filter queries run through the async driver inside the greenlet, needing no async reimplementation. Exports are guarded in __init__ so sync-only installs without greenlet still import cleanly. Adds an `async` install extra, aiosqlite/greenlet dev deps, async tests, and README/docs coverage. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This was referenced Jul 7, 2026
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Adds async counterparts to the existing seeders for projects running on an
AsyncSession.What
AsyncSeeder/AsyncHybridSeeder— same entities andinstancesAPI as the sync seeders, butseed()is awaitable.AsyncSession.run_sync, so afilter-key query still executes against the async driver mid-traversal — no async reimplementation of the walk.__init__, so sync-only installs without greenlet still import cleanly.asyncinstall extra (pip install "sqlalchemyseed[async]") pulls greenlet; users still bring their own async driver.Tests
3 new async tests (
unittest.IsolatedAsyncioTestCase) against in-memoryaiosqlite, covering nested relationships,add_to_session=False, and thefilter-key path that exercises real async driver I/O. Full suite: 93 passed.Docs
docs/async.rst, wired into the toctree.🤖 Generated with Claude Code