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from typing import Annotated
from fastapi import Depends, FastAPI, Path
from typing_extensions import Self
class MyDatabaseConnection:
"""
This is a mock just for example purposes.
"""
async def __aenter__(self) -> Self:
return self
async def __aexit__(self, exc_type, exc_val, exc_tb):
pass
async def get_records(self, table_name: str) -> list[dict]:
pass
async def get_record(self, table_name: str, record_id: str) -> dict:
pass
app = FastAPI()
async def get_database_connection():
async with MyDatabaseConnection() as connection:
yield connection
GlobalDatabaseConnection = Annotated[
MyDatabaseConnection, Depends(get_database_connection, dependency_scope="lifespan")
]
DedicatedDatabaseConnection = Annotated[
MyDatabaseConnection,
Depends(get_database_connection, dependency_scope="lifespan", use_cache=False),
]
@app.get("/groups/")
async def read_groups(database_connection: DedicatedDatabaseConnection):
return await database_connection.get_records("groups")
@app.get("/users/")
async def read_users(database_connection: DedicatedDatabaseConnection):
return await database_connection.get_records("users")
@app.get("/items/")
async def read_items(database_connection: GlobalDatabaseConnection):
return await database_connection.get_records("items")
@app.get("/items/{item_id}")
async def read_item(
database_connection: GlobalDatabaseConnection, item_id: Annotated[str, Path()]
):
return await database_connection.get_record("items", item_id)