在MongoDB Spring数据中使用多个方面
我想在一个聚合中运行多个方面,以节省db往返。这是我的spring数据代码:在MongoDB Spring数据中使用多个方面,mongodb,spring-boot,aggregation,facet,Mongodb,Spring Boot,Aggregation,Facet,我想在一个聚合中运行多个方面,以节省db往返。这是我的spring数据代码: final BalancesDTO total = this.mongoTemplate.aggregate( newAggregation( /* * Get all fund transactions for this user
final BalancesDTO total
= this.mongoTemplate.aggregate(
newAggregation(
/*
* Get all fund transactions for this user
*/
match(where("userId").is(userId)),
/*
* Summarize Confirmed Debits
*/
facet( match(where("entryType").is(EntryType.DEBIT)
.andOperator(where("currentStatus").is(TransactionStatus.CONFIRMED))),
unwind("history"),
match(where("history.status").is(TransactionStatus.CONFIRMED)),
project().andExpression("history.amount").as("historyAmount"),
group().sum("historyAmount").as("total"),
project("total")
).as("totalConfirmedDebits"),
/*
* Summarize Confirmed Credits
*/
facet( match(where("entryType").is(EntryType.CREDIT)
.andOperator(where("currentStatus").is(TransactionStatus.CONFIRMED))),
unwind("history"),
match(where("history.status").is(TransactionStatus.CONFIRMED)),
project().andExpression("history.amount").as("historyAmount"),
group().sum("historyAmount").as("total"),
project("total")
).as("totalConfirmedCredits")
),
FundTransactions.class,
BalancesDTO.class)
.getUniqueMappedResult();
LOGGER.debug("total : {}",total.getTotalConfirmedDebits().get(0).getTotal());
当我运行上述代码时,会出现以下异常:
java.lang.IllegalArgumentException: Invalid reference 'history'!
at org.springframework.data.mongodb.core.aggregation.ExposedFieldsAggregationOperationContext.getReference(ExposedFieldsAggregationOperationContext.java:100) ~[spring-data-mongodb-2.0.7.RELEASE.jar:2.0.7.RELEASE]
at org.springframework.data.mongodb.core.aggregation.ExposedFieldsAggregationOperationContext.getReference(ExposedFieldsAggregationOperationContext.java:72) ~[spring-data-mongodb-2.0.7.RELEASE.jar:2.0.7.RELEASE]
at org.springframework.data.mongodb.core.aggregation.UnwindOperation.toDocument(UnwindOperation.java:94) ~[spring-data-mongodb-2.0.7.RELEASE.jar:2.0.7.RELEASE]
at org.springframework.data.mongodb.core.aggregation.AggregationOperationRenderer.toDocument(AggregationOperationRenderer.java:55) ~[spring-data-mongodb-2.0.7.RELEASE.jar:2.0.7.RELEASE]
at org.springframework.data.mongodb.core.aggregation.FacetOperation$Facet.toDocuments(FacetOperation.java:224) ~[spring-data-mongodb-2.0.7.RELEASE.jar:2.0.7.RELEASE]
at org.springframework.data.mongodb.core.aggregation.FacetOperation$Facets.toDocument(FacetOperation.java:168) ~[spring-data-mongodb-2.0.7.RELEASE.jar:2.0.7.RELEASE]
at org.springframework.data.mongodb.core.aggregation.FacetOperation.toDocument(FacetOperation.java:87) ~[spring-data-mongodb-2.0.7.RELEASE.jar:2.0.7.RELEASE]
at org.springframework.data.mongodb.core.aggregation.AggregationOperationRenderer.toDocument(AggregationOperationRenderer.java:55) ~[spring-data-mongodb-2.0.7.RELEASE.jar:2.0.7.RELEASE]
at org.springframework.data.mongodb.core.aggregation.Aggregation.toDocument(Aggregation.java:585) ~[spring-data-mongodb-2.0.7.RELEASE.jar:2.0.7.RELEASE]
at org.springframework.data.mongodb.core.MongoTemplate$BatchAggregationLoader.prepareAggregationCommand(MongoTemplate.java:3124) ~[spring-data-mongodb-2.0.7.RELEASE.jar:2.0.7.RELEASE]
at org.springframework.data.mongodb.core.MongoTemplate$BatchAggregationLoader.aggregate(MongoTemplate.java:3107) ~[spring-data-mongodb-2.0.7.RELEASE.jar:2.0.7.RELEASE]
at org.springframework.data.mongodb.core.MongoTemplate.aggregate(MongoTemplate.java:1937) ~[spring-data-mongodb-2.0.7.RELEASE.jar:2.0.7.RELEASE]
at org.springframework.data.mongodb.core.MongoTemplate.aggregate(MongoTemplate.java:1832) ~[spring-data-mongodb-2.0.7.RELEASE.jar:2.0.7.RELEASE]
at io.tradehack.shared.fundtransactions.FundTransactionsRepositoryImpl.getFundBalances(FundTransactionsRepositoryImpl.java:41) ~[classes/:na]
at io.tradehack.shared.fundtransactions.FundTransactionsRepositoryImpl$$FastClassBySpringCGLIB$$89f7e1a0.invoke(<generated>) ~[classes/:na]
)
以下是样本数据:
{
"_id" : "dfe9dd63-6689-4e9f-8494-24efa6191db1",
"userId" : "6cd984b9-1c17-402b-be9c-70614e0b8b8e",
"entryType" : "DEBIT",
"type" : "DEPOSIT",
"createdDateTime" : ISODate("2018-11-11T03:00:00.000+00:00"),
"currentVersion" : 2,
"currentStatus" : "CONFIRMED",
"history" : [
{
"referenceId" : null,
"currency" : "USD",
"amount" : 1000000,
"comments" : "Initial fundings",
"updatedDateTime" : ISODate("2018-11-11T03:00:00.000+00:00"),
"status" : "PENDING",
"version" : 1
},
{
"referenceId" : null,
"currency" : "USD",
"amount" : 1001000,
"comments" : "Initial fundings",
"updatedDateTime" : ISODate("2018-11-11T04:00:00.000+00:00"),
"status" : "CONFIRMED",
"version" : 2
}
]
}
非常感谢您的帮助。您可以使用
.and()
和.as()
方法链接多方面操作。您应该将第二个facet
方法替换为和
方法,如下所示
FacetOperation facets = facet(match(where("entryType").is(EntryType.DEBIT)
.andOperator(where("currentStatus").is(TransactionStatus.CONFIRMED))),
unwind("history"),
match(where("history.status").is(TransactionStatus.CONFIRMED)),
project().andExpression("history.amount").as("historyAmount"),
group().sum("historyAmount").as("total"),
project("total")
).as("totalConfirmedDebits"),
/*
* Summarize Confirmed Credits
*/
.and(match(where("entryType").is(EntryType.CREDIT)
.andOperator(where("currentStatus").is(TransactionStatus.CONFIRMED))),
unwind("history"),
match(where("history.status").is(TransactionStatus.CONFIRMED)),
project().andExpression("history.amount").as("historyAmount"),
group().sum("historyAmount").as("total"),
project("total")
).as("totalConfirmedCredits")
这很有帮助,节省了很多时间。你解决问题了吗?
FacetOperation facets = facet(match(where("entryType").is(EntryType.DEBIT)
.andOperator(where("currentStatus").is(TransactionStatus.CONFIRMED))),
unwind("history"),
match(where("history.status").is(TransactionStatus.CONFIRMED)),
project().andExpression("history.amount").as("historyAmount"),
group().sum("historyAmount").as("total"),
project("total")
).as("totalConfirmedDebits"),
/*
* Summarize Confirmed Credits
*/
.and(match(where("entryType").is(EntryType.CREDIT)
.andOperator(where("currentStatus").is(TransactionStatus.CONFIRMED))),
unwind("history"),
match(where("history.status").is(TransactionStatus.CONFIRMED)),
project().andExpression("history.amount").as("historyAmount"),
group().sum("historyAmount").as("total"),
project("total")
).as("totalConfirmedCredits")