MongoDB aggregate query with a where in node.js -



MongoDB aggregate query with a where in node.js -

i have next mongodb query in node.js gives me list of unique zip codes count of how many times zip code appears in database.

collection.aggregate( [ { $group: { _id: "$location.zip", count: { $sum: 1 } } }, { $sort: { _id: 1 } }, { $match: { count: { $gt: 1 } } } ], function ( lookuperr, lookupdata ) { if (lookuperr) { res.send(lookuperr); return; } res.send(lookupdata.sort()); }); });

how can query modified homecoming 1 specific zip code? i've tried status clause have not been able work.

aggregations require filtered results can done $match operator. without tweaking have, suggest sticking in $match zip code want returned @ top of aggregation list.

collection.aggregate( [ { $match: { zip: 47421 } }, { $group: { ...

this illustration result in every aggregation operation after $match working on only info set returned $match of zip key value 47421.

node.js mongodb

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