$project 中的 $filter MongoDB 使用 Spring 数据
$filter inside $project MongoDB Using Spring Data
我有一个子文档,它是父文档的数组。 "devices"
在那个数组中,我有一个 属性,它是一个日期 属性。
我想像这样按确定的日期查找包含子子文档的父文档:
{
"_id" : ObjectId("5818fa596969a1339093a7da"),
"fecha" : ISODate("2016-11-01T05:00:00.000Z"),
"spot" : "5808e3926969a126c8365c94",
"devices" : [
{
"evaluationDate" : ISODate("2016-11-01T20:26:00.000Z"),
"seenTimesCounter" : 0,
"category" : "PRE_PASAJERO",
"status" : "NO_CONECTADO"
},
{
"evaluationDate" : ISODate("2016-11-01T20:26:00.000Z"),
"seenTimesCounter" : 0,
"category" : "PRE_PASAJERO",
"status" : "NO_CONECTADO"
},
{
"evaluationDate" : ISODate("2016-11-01T20:26:00.000Z"),
"seenTimesCounter" : 0,
"category" : "PRE_PASAJERO",
"status" : "NO_CONECTADO"
},
{
"evaluationDate" : ISODate("2016-11-01T20:26:00.000Z"),
"seenTimesCounter" : 0,
"category" : "PRE_PASAJERO",
"status" : "NO_CONECTADO"
},
{
"evaluationDate" : ISODate("2016-11-01T20:26:00.000Z"),
"seenTimesCounter" : 0,
"category" : "PRE_PASAJERO",
"status" : "NO_CONECTADO"
},
{
"evaluationDate" : ISODate("2016-11-01T20:26:00.000Z"),
"seenTimesCounter" : 0,
"category" : "PRE_PASAJERO",
"status" : "NO_CONECTADO"
}
]
}
我已经在 mongo shell 上试过了(查询很好,Returns 我想要的):
db.getCollection('spotMovimientos').aggregate([
{$match:{'devices.evaluationDate':ISODate("2016-11-01T20:26:00.000Z")}},
{$project: {
'devices':{$filter:{
input:'$devices',
as:'device',
cond: {$eq: ['$$device.evaluationDate', ISODate("2016-11-01T20:26:00.000Z")]}
}
} }
}
])
任何人都可以详细说明一下吗?我需要帮助将其转换为 SPRING DATA
谢谢。
我设法用 Spring 引导版本 1.4 解决了我的问题。1.RELEASE 我这样做了:
Aggregation aggregation = newAggregation(
match(Criteria.where("devices.evaluationDate").is(date)),
project().and(new AggregationExpression() {
@Override
public DBObject toDbObject(AggregationOperationContext aggregationOperationContext) {
DBObject filterExpression = new BasicDBObject();
filterExpression.put("input", "$devices");
filterExpression.put("as", "device");
filterExpression.put("cond", new BasicDBObject("$eq", Arrays.<Object> asList("$$device.evaluationDate", date)));
return new BasicDBObject("$filter", filterExpression);
}
}).as("devices")
);
AggregationResults<SpotMovimientos> list = mongoOperations.aggregate(aggregation,
MyClass.class, MyClass.class);
我是根据这个阐述的:
我的项目在 Spring boot 1.4.0.RELEASE 但那个版本没有 AggregationExpression 接口 PUBLIC,所以我刚刚更新了到 1.4.1.RELEASE 我确实工作了。
这就是它在 spring-data-monogodb-2.0.10 (Spring Boot 2)
中的制作方式
Aggregation aggregation = newAggregation(
match(Criteria.where("devices.evaluationDate").is(date)),
project().and(new AggregationExpression() {
@Override
public Document toDocument(AggregationOperationContext aggregationOperationContext) {
Document filterExpression = new Document();
filterExpression.put("input", "$devices");
filterExpression.put("as", "device");
filterExpression.put("cond", new Document("$eq", Arrays.<Object> asList("$$device.evaluationDate", date)));
return new Document("$filter", filterExpression);
}
}).as("devices")
);
我有一个子文档,它是父文档的数组。 "devices"
在那个数组中,我有一个 属性,它是一个日期 属性。
我想像这样按确定的日期查找包含子子文档的父文档:
{
"_id" : ObjectId("5818fa596969a1339093a7da"),
"fecha" : ISODate("2016-11-01T05:00:00.000Z"),
"spot" : "5808e3926969a126c8365c94",
"devices" : [
{
"evaluationDate" : ISODate("2016-11-01T20:26:00.000Z"),
"seenTimesCounter" : 0,
"category" : "PRE_PASAJERO",
"status" : "NO_CONECTADO"
},
{
"evaluationDate" : ISODate("2016-11-01T20:26:00.000Z"),
"seenTimesCounter" : 0,
"category" : "PRE_PASAJERO",
"status" : "NO_CONECTADO"
},
{
"evaluationDate" : ISODate("2016-11-01T20:26:00.000Z"),
"seenTimesCounter" : 0,
"category" : "PRE_PASAJERO",
"status" : "NO_CONECTADO"
},
{
"evaluationDate" : ISODate("2016-11-01T20:26:00.000Z"),
"seenTimesCounter" : 0,
"category" : "PRE_PASAJERO",
"status" : "NO_CONECTADO"
},
{
"evaluationDate" : ISODate("2016-11-01T20:26:00.000Z"),
"seenTimesCounter" : 0,
"category" : "PRE_PASAJERO",
"status" : "NO_CONECTADO"
},
{
"evaluationDate" : ISODate("2016-11-01T20:26:00.000Z"),
"seenTimesCounter" : 0,
"category" : "PRE_PASAJERO",
"status" : "NO_CONECTADO"
}
]
}
我已经在 mongo shell 上试过了(查询很好,Returns 我想要的):
db.getCollection('spotMovimientos').aggregate([
{$match:{'devices.evaluationDate':ISODate("2016-11-01T20:26:00.000Z")}},
{$project: {
'devices':{$filter:{
input:'$devices',
as:'device',
cond: {$eq: ['$$device.evaluationDate', ISODate("2016-11-01T20:26:00.000Z")]}
}
} }
}
])
任何人都可以详细说明一下吗?我需要帮助将其转换为 SPRING DATA
谢谢。
我设法用 Spring 引导版本 1.4 解决了我的问题。1.RELEASE 我这样做了:
Aggregation aggregation = newAggregation(
match(Criteria.where("devices.evaluationDate").is(date)),
project().and(new AggregationExpression() {
@Override
public DBObject toDbObject(AggregationOperationContext aggregationOperationContext) {
DBObject filterExpression = new BasicDBObject();
filterExpression.put("input", "$devices");
filterExpression.put("as", "device");
filterExpression.put("cond", new BasicDBObject("$eq", Arrays.<Object> asList("$$device.evaluationDate", date)));
return new BasicDBObject("$filter", filterExpression);
}
}).as("devices")
);
AggregationResults<SpotMovimientos> list = mongoOperations.aggregate(aggregation,
MyClass.class, MyClass.class);
我是根据这个阐述的:
我的项目在 Spring boot 1.4.0.RELEASE 但那个版本没有 AggregationExpression 接口 PUBLIC,所以我刚刚更新了到 1.4.1.RELEASE 我确实工作了。
这就是它在 spring-data-monogodb-2.0.10 (Spring Boot 2)
中的制作方式Aggregation aggregation = newAggregation(
match(Criteria.where("devices.evaluationDate").is(date)),
project().and(new AggregationExpression() {
@Override
public Document toDocument(AggregationOperationContext aggregationOperationContext) {
Document filterExpression = new Document();
filterExpression.put("input", "$devices");
filterExpression.put("as", "device");
filterExpression.put("cond", new Document("$eq", Arrays.<Object> asList("$$device.evaluationDate", date)));
return new Document("$filter", filterExpression);
}
}).as("devices")
);