Mudanças entre as edições de "Query de MongoDB agregando por mês e ano"
De Basef
(Criou página com 'Query do Mongo: <source lang="javascript"> db.collection.aggregate( {$project : { year : {$year : "$createdAt"}, month : {$month : "$createdAt"} }}...') |
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| Linha 21: | Linha 21: | ||
"{ " + | "{ " + | ||
"$project: { " + | "$project: { " + | ||
| − | "year: {$year: \"$ | + | "year: {$year: \"$createdAt\"}, " + |
| − | "month: {$month: \"$ | + | "month: {$month: \"$createdAt\"} " + |
"} " + | "} " + | ||
"}, " + | "}, " + | ||
| Linha 47: | Linha 47: | ||
List criteria = asList( | List criteria = asList( | ||
new BasicDBObject("$project", | new BasicDBObject("$project", | ||
| − | new BasicDBObject("year", new BasicDBObject("$year", "$ | + | new BasicDBObject("year", new BasicDBObject("$year", "$createdAt")) |
| − | .append("month", new BasicDBObject("$month", "$ | + | .append("month", new BasicDBObject("$month", "$createdAt")) |
), | ), | ||
new BasicDBObject("$group", | new BasicDBObject("$group", | ||
Edição das 20h18min de 21 de agosto de 2016
Query do Mongo:
db.collection.aggregate( {$project : { year : {$year : "$createdAt"}, month : {$month : "$createdAt"} }}, {$group : { _id : {year : "$year", month : "$month"}, count : {$sum : 1} }} )
No Java, com query string:
List criteria = (List) JSON.parse( "[" + "{ " + "$project: { " + "year: {$year: \"$createdAt\"}, " + "month: {$month: \"$createdAt\"} " + "} " + "}, " + "{ " + "$group: { " + "_id: { " + "year: \"$year\", " + "month: \"$month\"" + "} " + "} " + "} " + "]" ); MongoTemplate mongo = new MongoTemplate(new Mongo("localhost"), "myMongoDb"); AggregationOutput output = mongo.getCollection(Transaction.collection).aggregate(criteria);
No Java, utilizando objetos:
List criteria = asList( new BasicDBObject("$project", new BasicDBObject("year", new BasicDBObject("$year", "$createdAt")) .append("month", new BasicDBObject("$month", "$createdAt")) ), new BasicDBObject("$group", new BasicDBObject("_id", new BasicDBObject("year", "$year") .append("month", "$month") ) .append("count", new BasicDBObject("$sum", 1)) ) ); MongoTemplate mongo = new MongoTemplate(new Mongo("localhost"), "myMongoDb"); AggregationOutput output = mongo.getCollection(Transaction.collection).aggregate(criteria);
