Issue
I have a function that is written as so:
@database_sync_to_async
def list_values(self):
return list(
Model.objects.all().select_related("related").order('date')[::-1]
)
I'm trying to rewrite to work with an async for loop async for value in self.list_values
. However my current attempt
async def list_values(self):
return (
Model.objects.all().select_related("related").order('date')[::-1]
)
Gives me an error 'async for' requires an object with __aiter__ method, got coroutine
. I've also played around with adding await and yield, etc. but to no end. Any suggestions and an explanation of how I'm thinking about this wrong?
Solution
It seems you're trying to make your list_values
function asynchronous. The issue you're facing is because the queryset itself is not asynchronous. To fix this, you should use an asynchronous version of the queryset operation. Here's the corrected version:
async def list_values(self):
return [_obj async for _obj in Model.objects.all().select_related("related").order_by('date')]
Changes made:
- Use
order_by
instead oforder
for ordering the queryset. - Employ an asynchronous list comprehension (
[_obj async for _obj in ...]
) to iterate asynchronously over the queryset.
This should resolve the error you encountered. Make sure to use async for
when iterating over asynchronous operations.
Additionally, to learn more about Django's asynchronous ORM queries, you can refer to the Django documentation on asynchronous queries. This resource will provide you with a deeper understanding and serve as a helpful reference for future asynchronous ORM operations.
Answered By - godd0t
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