[Solved] Identify the error in this async middleware code: class HeaderMiddleware: def __init__(self, get_response): self.get_response = get_response async def __call__(self, request): response = self.... | Django

Django - Async Django

Identify the error in this async middleware code:

class HeaderMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response

    async def __call__(self, request):
        response = self.get_response(request)
        response['X-Custom'] = 'Value'
        return response

AAsync __call__ cannot return response

BCannot modify response headers in middleware

CMissing await before self.get_response(request)

DMissing async keyword in __init__

Step-by-Step Solution

Solution:

Step 1: Check async call to get_response
Since __call__ is async, get_response must be awaited if it returns a coroutine.
Step 2: Identify missing await
The code calls self.get_response(request) without await, causing a coroutine object instead of response.
Final Answer:
Missing await before self.get_response(request) -> Option C
Quick Check:
Async call needs await before get_response [OK]

Quick Trick: Await async calls inside async methods [OK]

Common Mistakes:

MISTAKES

Forgetting await on async get_response
Thinking response headers can't be changed
Adding async to __init__ method

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Identify the error in this async middleware code:

Step 1: Check async call to get_response

Step 2: Identify missing await

Final Answer:

Quick Check:

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