java - Nested projection with spring aggregation -


i'm trying create projection on mongo collection using spring data mongo aggregation libraries.

assume have collection:

{     "_id": "33",     "name": "foo",     "payments": {         "years": [{             "year": 2017,             "quarters": [{                 "quarter": 3,                 "transactions": [{                     "amount": 800,                     "type": "varia"                     "dayofmonth": 10                 }]             }]         }] }

i use mongo aggregation query:

db.customers.aggregate(  { $match: { "_id": {$in:  ["33", "80"]  } }},  { $project: { "payments":{"years":{"quarters":{"transactions":{"amount":1,"type":1}}}} } },  { $unwind: "$payments.years" },  { $unwind: "$payments.years.quarters" },  { $unwind: "$payments.years.quarters.transactions" },  { $match: { "payments.years.quarters.transactions.amount": {$ne: "0.00" }} },  { $group: { "_id": "$_id", "payments": {"$push": "$payments.years.quarters.transactions"} }}  )

but trying implement in java application now. use spring-data-mongo.

i tried way i'm receiving 0 results.

matchoperation matchallklantenstage = aggregation.match(new criteria("_id").in(ids));  projectionoperation projectstage = project()         .and("payments.years.quarters.transactions")         .nested(bind("type","payments.years.quarters.transactions.type")         .and("amount", "payments.years.quarters.transactions.amount")         .and("dayofmonth", "payments.years.quarters.transactions.dayofmonth"));   aggregation aggregation = newaggregation(         matchallklantenstage,         projectstage,         unwind("payments.years.quarters.transactions"),         match(new criteria("payments.years.quarters.transactions.amount").ne("0.00")),         group().push("payments.years.quarters.transactions").as("payments") );

can me this?

kind regards,

kaj


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