How can you use Depends to share a database session across multiple routes without repeating code? Choose the best approach.

hard🚀 Application Q15 of 15

FastAPI - Dependency Injection

How can you use Depends to share a database session across multiple routes without repeating code? Choose the best approach.

AUse Depends without any function to automatically get the session

BPass the session as a global variable to all routes

CManually create a session inside each route function

DCreate a function that returns the session and use Depends on it in each route

Step-by-Step Solution

Solution:

Step 1: Understand code reuse with Depends
Depends allows you to write a function that creates or yields a database session once and injects it wherever needed.
Step 2: Identify the best practice
Creating a session function and using Depends on it in routes avoids repetition and manages session lifecycle cleanly.
Final Answer:
Create a function that returns the session and use Depends on it in each route -> Option D
Quick Check:
Use Depends with session function for reuse = D [OK]

Quick Trick: Use Depends with a session function to share DB session [OK]

Common Mistakes:

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