Files
fastapi/docs/src/dependencies/tutorial009.py
Sebastián Ramírez 3f9f4a0f8f Add dependencies with yield (used as context managers) (#595)
*  Add development/testing dependencies for Python 3.6

*  Add concurrency submodule with contextmanager_in_threadpool

*  Add AsyncExitStack to ASGI scope in FastAPI app call

*  Use async stack for contextmanager-able dependencies

including running in threadpool sync dependencies

*  Add tests for contextmanager dependencies

including internal raise checks when exceptions should be handled and when not

*  Add test for fake asynccontextmanager raiser

* 🐛 Fix mypy errors and coverage

* 🔇 Remove development logs and prints

*  Add tests for sub-contextmanagers, background tasks, and sync functions

* 🐛 Fix mypy errors for Python 3.7

* 💬 Fix error texts for clarity

* 📝 Add docs for dependencies with yield

*  Update SQL with SQLAlchemy tutorial to use dependencies with yield

and add an alternative with a middleware (from the old tutorial)

*  Update SQL tests to remove DB file during the same tests

*  Add tests for example with middleware

as a copy from the tests with dependencies with yield, removing the DB in the tests

* ✏️ Fix typos with suggestions from code review

Co-Authored-By: dmontagu <35119617+dmontagu@users.noreply.github.com>
2019-10-09 13:01:58 -05:00

26 lines
455 B
Python

from fastapi import Depends
async def dependency_a():
dep_a = generate_dep_a()
try:
yield dep_a
finally:
dep_a.close()
async def dependency_b(dep_a=Depends(dependency_a)):
dep_b = generate_dep_b()
try:
yield dep_b
finally:
dep_b.close(dep_a)
async def dependency_c(dep_b=Depends(dependency_b)):
dep_c = generate_dep_c()
try:
yield dep_c
finally:
dep_c.close(dep_b)