Question

我使用SpringBoot（v1.5.10），SpringData和MongoDb;

db.login.aggregate(
[
    { 
        "$match" : {
            "user._id" : NumberLong(204)
        }
    }, 
    { 
        "$group" : {
            "_id" : {
               "datetime" : { $dateToString: { format: "%d-%m-%Y", date: "$datetime"}}, 
                "ip" : "$ip",


            },
             count: { $sum: 1 }   
        }
    }

]);

2011-01-10算5

2011-01-16算上16

    Criteria criteria = Criteria.where("user._id").is(paramuserid).andOperator(
        Criteria.where("datetime").gte(paramfirstdate),
        Criteria.where("datetime").lt(paramseconddate)
                );
AggregationOperation match = Aggregation.match(criteria);   

List<AggregationOperation> aggregationoperations = new ArrayList <AggregationOperation>();  
aggregationoperations.add(match);
aggregationoperations.add(Aggregation.group("datetime"));  
AggregationResults<?> aggregationresults = this.mngT.aggregate(Aggregation.newAggregation(aggregationoperations), Login.class, Object.class);

2011-01-10 09:00:01算1
2011-01-10 09:15:00算上1

Mongo聚合组日期时间没有“时间”，我尝试类似的条件查询不工作，因为组有时间部分。如何在criteriaquery

中使用“$ dateToString”

Answer 1

我解决了。

Criteria criteria = Criteria.where("user._id").is(paramuserid).andOperator(
            Criteria.where("datetime").gte(paramfirstdate),
            Criteria.where("datetime").lt(paramseconddate)
                    );
    AggregationOperation match = Aggregation.match(criteria);   

    List<AggregationOperation> aggregationoperations = new ArrayList <AggregationOperation>();  
    aggregationoperations.add(match);
    aggregationoperations.add(Aggregation.project("ip","datetime").andExpression("datetime").dateAsFormattedString("%d-%m-%Y").as("formateddate"));
    aggregationoperations.add(Aggregation.group("ip","formateddate").count().as("TOT"));
    AggregationResults<?> aggregationresults = this.mngT.aggregate(Aggregation.newAggregation(aggregationoperations), Login.class, Object.class);

如何在Mongo criteriaQuery（Spring Boot）中使用“$ dateToString”

1 个答案: