Created
February 2, 2016 09:05
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Find duplicates in MongoDB collection using Aggregate in Rails Console
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| results = Merchant.collection.aggregate([ | |
| { "$group" => { | |
| _id: { "confirmation_token" => "$confirmation_token"}, | |
| recordIds: {"$addToSet" => "$_id" }, | |
| count: { "$sum" => 1 } | |
| }}, | |
| { "$match" => { | |
| count: { "$gt" => 1 } | |
| }} | |
| ]) |
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