You want to migrate a Flask app to async and have a route that calls an async database query function async def fetch_data(). Which is the correct way to write the route?

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Flask - Ecosystem and Patterns

You want to migrate a Flask app to async and have a route that calls an async database query function async def fetch_data(). Which is the correct way to write the route?

Adef data(): result = fetch_data(); return result

Basync def data(): result = await fetch_data(); return result

Casync def data(): result = fetch_data(); return result

Ddef data(): result = await fetch_data(); return result

Step-by-Step Solution

Solution:

Step 1: Understand async function calls
To call an async function like fetch_data(), you must use await inside an async function.
Step 2: Match route definition with async call
The route must be async to use await. async def data(): result = await fetch_data(); return result correctly defines async route and awaits the async call.
Final Answer:
async def data(): result = await fetch_data(); return result -> Option B
Quick Check:
Async route + await async call = correct [OK]

Quick Trick: Use async def and await for async calls inside routes [OK]

Common Mistakes:

MISTAKES

Calling async function without await
Using await in sync functions
Defining sync route for async calls

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More Flask Quizzes

You want to migrate a Flask app to async and have a route that calls an async database query function async def fetch_data(). Which is the correct way to write the route?

Step 1: Understand async function calls

Step 2: Match route definition with async call

Final Answer:

Quick Check:

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