Implemented qinspect as a context manager. #29
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I adore django-queryinspect, but it can't be used in things like management commands or other non-request contexts (e.g. celery tasks), since it's a middleware.
So I implemented the same functionality as a context manager. It worked great, so I figured I'd contribute it back to the original project.
I also fixed a small bug in
QueryInspectMiddleware
.check_stddev_limit()
was clearly intended to be a classmethod, but the decorator was missing. I needed it to be a classmethod to make the context manager work, so I fixed that.