MongoEngine / MongoEngine/mongoengine

Should max_time_ms apply to aggregate functions?

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Python
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Description

From the documentation I would have thought that max_time_ms will apply to calls to aggregate.

But in reality, you need to pass the value as a keyword argument to aggregate: e.g. aggregate(*pipeline, maxTimeMS=1000)

I could do a PR for the QuerySet to do this automatically (if _max_time_ms is not None) in aggregate. Would that be accepted? Or is there a reason why the aggregate calls do not honor max_time_ms?

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Research direction

Start by reading QuerySet.max_time_ms and QuerySet.aggregate, along with the linked API documentation, to compare the documented behavior with the current aggregate call. Check how MongoDB receives maxTimeMS and add focused coverage if the project has an appropriate queryset test location; done means aggregate honors the configured timeout consistently.

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Assessment

Tech stack
mongodb, python
Domain
database
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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