FastAPI - Database Integration
Which of the following is the correct way to declare a dependency for a database session in a FastAPI route using
Depends?Which of the following is the correct way to declare a dependency for a database session in a FastAPI route using Depends?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Understand FastAPI dependency injection syntax
FastAPI usesDependsto inject dependencies like database sessions into route functions.Step 2: Correct syntax for session injection
The correct syntax is to type hint the parameter asSessionand assign itDepends(get_db)to call the dependency function.Final Answer:
def read_items(db: Session = Depends(get_db)): -> Option DQuick Check:
Dependency injection = parameter: Type = Depends(function) [OK]
Quick Trick: Use parameter: Type = Depends(function) for dependencies [OK]
Common Mistakes:
MISTAKES- Calling get_db() directly in parameter default
- Using Depends with a class instead of a function
- Swapping parameter and default values
Master "Database Integration" in FastAPI
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