How to pass allowDiskUse=true option to aggregate function?

[James Qiu]

Usage like:
(aggregate :collname {:$group {..}} {:allowDiskUse true})
is no use.
It's still give error msg:
CompilerException com.mongodb.CommandFailureException: { "serverUsed" : "127.0.0.1:27017" , "ok" : 0.0 , "errmsg" : "Exceeded memory limit for $group, but didn't allow external sort. Pass allowDiskUse:true to opt in." }
Help!

[Sean Corfield]

I thought I'd answered this already but don't see the response on the list...

Try:

    (aggregate :collname {:$group {..} :allowDiskUse true})

According to the MongoDB docs, that option goes on the top-level aggregate operation.

Note: CongoMongo uses a deprecated API for aggregate and there are no tests at all for aggregate. Also, it has not been updated since before MongoDB 3.0 appeared (although I believe it works with 3.0). It uses the old 2.x drivers. I have no plans to update it -- we're in the process of migrating off MongoDB at work and, even before that decision, I was considering migrating our code base to Monger since that is much better maintained and much better documented. CongoMongo is pretty much abandonware at this point. I think it has very few users and all the maintainers seem to have either moved on from Clojure or moved on from MongoDB (or both).

Sean