FastAPI - Dependency Injection
Which method must a class implement to be used as a dependency in FastAPI?
Which method must a class implement to be used as a dependency in FastAPI?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Recall FastAPI dependency requirements
FastAPI requires the class to be callable, which means it must implement the __call__ method.Step 2: Match method names to this requirement
Only __call__ makes the class instance callable; __init__ is for initialization, others are invalid.Final Answer:
__call__ -> Option BQuick Check:
Callable class = __call__ method [OK]
Quick Trick: Class must be callable via __call__ method [OK]
Common Mistakes:
MISTAKES- Choosing __init__ instead of __call__
- Using random method names like 'run'
- Confusing dependency with method name
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