Mongo aggregate fails?

[Damon Casale]

I'm unable to run a Mongo aggregate command.  It prints "..." in the command shell and never finishes.  Even explain stalls.

I'm trying to do this:

db.listings.aggregate([{$group: {'_id': {AssignedNeighborhood: $AssignedNeighborhood}, 'count': {$sum: 1}}], {explain: true})

What am I doing wrong?  Please help.

Mongo version is 2.6.11.  And yes, I have an index on AssignedNeighborhood.

Damon

[Asya Kamsky]

You don't have enough closing braces } you need one more before ] 

The ... means it's waiting for more input. 

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Asya Kamsky
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