[Solved] How can you combine async Flask routes with synchronous extensions like Flask-Login? — Ans: Use await only in route logic, keep extension calls synchronous | Flask

Flask - Ecosystem and Patterns

How can you combine async Flask routes with synchronous extensions like Flask-Login?

ACall synchronous extensions inside <code>asyncio.run()</code> in routes

BRewrite extensions to async versions before migrating routes

CAvoid using extensions in async routes

DUse <code>await</code> only in route logic, keep extension calls synchronous

Step-by-Step Solution

Solution:

Step 1: Understand extension compatibility
Many Flask extensions are synchronous and can be used safely in async routes if called synchronously.
Step 2: Identify best practice
Use await for async calls, but call synchronous extension functions normally without await.
Final Answer:
Use await only in route logic, keep extension calls synchronous -> Option D
Quick Check:
Mix async route with sync extensions by calling sync code normally [OK]

Quick Trick: Call sync extensions normally inside async routes [OK]

Common Mistakes:

MISTAKES

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