simple_module_db
Database layer for the simple_module framework. Provides a per-module Base, an async SQLAlchemy/SQLModel session, standard mixins, and an auto-commit-on-flush listener that removes manual session.commit() calls from service code.
Install
pip install simple_module_db
What it provides
create_module_base("<module_name>")— a module-scoped declarativeBasewith its ownMetaData. All modules share the host's single schema, so__tablename__should be prefixed with the module name (e.g.users_user) to avoid collisions.- Per-request
RequestSession(get_db) that commits pending writes before the response and rolls back read-only requests. session.on_commit(callback)for synchronous or asynchronous cache refreshes that must only run after a successful request commit.- Mixins in
simple_module_db.mixins:AuditMixin(created_at/updated_at),SoftDeleteMixin(auto-filtered unlessstmt.execution_options(include_deleted=True)),MultiTenantMixin,VersionedMixin. DatabaseStatecontainer used by the framework to avoid global mutable state.
Usage
# modules/orders/orders/models.py
from simple_module_db import AuditMixin, SoftDeleteMixin, create_module_base
from sqlmodel import Field
Base = create_module_base("orders")
class Order(Base, AuditMixin, SoftDeleteMixin, table=True):
id: int | None = Field(default=None, primary_key=True)
customer_id: int = Field(index=True, foreign_key="users_user.id")
total_cents: int
In a service:
from simple_module_db import RequestSession, get_db
async def create_order(session: RequestSession = Depends(get_db), ...):
order = Order(customer_id=..., total_cents=...)
session.add(order)
await session.flush() # assigns order.id; commit happens before the response
session.on_commit(order_cache.refresh)
return order
Never call session.commit() — the framework handles it.
Depends on
simple_module_core,sqlalchemy[asyncio],sqlmodel,alembic,asyncpg,aiosqlite
License
MIT — see LICENSE.
1 maintainer
Metadata
1 maintainer
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