當使用嵌入式mongo文檔我試圖展開數組,但我收到異常像org.springframework.data.mapping.model.MappingInstantiationException:無法實例化java.util .List使用帶參數的構造函數NO_CONSTRUCTOR。我就是寫的查詢,Mongo數據庫java unwind操作聚合查詢拋出異常
Aggregation agg = newAggregation(
unwind("recipients"),
match(Criteria.where("recipients.userId").is("800").andOperator(Criteria.where("recipients.status").is(false)
)));
Logs.java
private String id;
private String userId;
private String conversationId;
private Date createdDate;
private List<Recipients> recipients;
Recipients.java
private String userId;
private boolean status;
數據集
{
"_id" : ObjectId("579099e6000fda45000c0054"),
"userId" : "800",
"conversationId" : "57907e5f000fda45000c004b",
"createdDate" : ISODate("2016-07-21T09:46:14.602Z"),
"recipients" : [
{
"userId" : "800",
"status" : false
},
{
"userId" : "900",
"status" : false
}
]
}
{
"_id" : ObjectId("579099e9000fda45000c0055"),
"userId" : "530a7998-ba3f-4366-8d21-bb1ca688cfdb",
"conversationId" : "57907e5f000fda45000c004b",
"createdDate" : ISODate("2016-07-21T09:46:17.915Z"),
"recipients" : [
{
"userId" : "800",
"status" : true
},
{
"userId" : "900",
"status" : false
}
]
}
{
"_id" : ObjectId("5790adda000fda2444d6ccdf"),
"userId" : "530a7998-ba3f-4366-8d21-bb1ca688cfdb",
"conversationId" : "578df6cf000fda2640b77c45",
"createdDate" : ISODate("2016-07-21T11:11:22.522Z"),
"recipients" : [
{
"userId" : "800",
"status" : false
},
{
"userId" : "530a7998-ba3f-4366-8d21-bb1ca688cfdb",
"status" : true
}
]
}
{
"_id" : ObjectId("5790adde000fda2444d6cce0"),
"userId" : "530a7998-ba3f-4366-8d21-bb1ca688cfdb",
"conversationId" : "578df6cf000fda2640b77c45",
"createdDate" : ISODate("2016-07-21T11:11:26.479Z"),
"recipients" : [
{
"userId" : "800",
"status" : false
},
{
"userId" : "530a7998-ba3f-4366-8d21-bb1ca688cfdb",
"status" : true
}
]
}
你能寫代碼在哪裏調用聚合方法嗎? –
@Andriy Simonov:我從另一個類中調用聚合函數,只有一種方法,我將使用動態用戶配置文件Id調用該方法。但是,在這裏我硬編碼的用戶配置文件ID爲800. – Karthik