How to use Aggregate in mongoose

Question

How do I define the following MongoDB aggregate query in mongoose:

db.contacts.aggregate([{$group: { \"_id\": { code: \"$Code\", name: \"$Name\" } } }])
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Answer 1

Try this

Contacts.aggregate({$group: { "_id": { code: "$Code", name: "$Name" } } }, function(err, contacts) {
   ...
});

Or, with $match if you need this AgencyTranslation: /^BROADCASTING/ condition

Contacts.aggregate([
  { $match : { AgencyTranslation: /^BROADCASTING/ } },
  { $group: { "_id": { code: "$Code", name: "$Name" } } }
], function(err, contacts) {
  // ...
});