💭 FastAPI - dependency inside Middleware? - Stack Overflow
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!https://stackoverflow.com/questions/72243379/fastapi-dependency-inside-middleware#answer-72480781

Date: December 17, 2023

FastAPI - How to use dependencies inside a Middleware?
 I am building a browser game where every user has 4 types of resources and each user produces more resources based on the level of their farms.
What I am trying to do, is whenever a given user is l...
 Stack Overflow · stackoverflow.com [1]

After struggling to get dependencies inside of middleware I learned that you can make global dependencies at the app level. I used this to set the user on every single route of the application without needing Depend on getting the user on each route.

``` python
from fastapi import Depends, FastAPI, Request

def get_db_session():
 print("Calling 'get_db_session(...)'")
 return "Some Value"

def get_current_user(session=Depends(get_db_session)):
 print("Calling 'get_current_user(...)'")
 return session

def recalculate_resources(request: Request, current_user=Depends(get_current_user)):
 print("calling 'recalculate_resources(...)'")
 request.state.foo = current_user

app = FastAPI(dependencies=[Depends(recalculate_resources)])

@app.get("/")
async def root(request: Request):
 return {"foo_from_dependency": request.state.foo}
```

!!! note

 This post is a thought [2]. It's a short note that I make
 about someone else's content online #thoughts [3]

References:
[1]: https://stackoverflow.com/questions/72243379/fastapi-dependency-inside-middleware#answer-72480781
[2]: /thoughts/
[3]: /tags/thoughts/