2.9 特殊场景二:Query.fields().exclude(“field”) 假设这样一个场景:有一个Student类,它里面有name、age、describle、height等字段,其中describle字段代表对这个学生的描述,一般内容比较长。于是,当我们在查询Student时,我并不是很关注describle信息,这时为了提高提高前台查询显示的效率,我们可以使用Query.fields().exc...
query.with(new Sort(Direction.ASC, CONSTS.DEVICE_SERIAL_FIELD, CONSTS.DOMAINID_FIELD)); // 查询总数 int count = (int) mongoOperations.count(query, DeviceStatusItem.class, collectionName); List<DeviceStatusItem> items = mongoOperations.find(query, DeviceStatusItem.class, collectionName); // Sy...
@Query(value = "{'created_at':{$gte:?0,$lte:?1}}", sort = "{ created_at : -1 }") List<Note> findByCreateDTime(Date startDate, Date endDate); @Query(value = "{'name':{$regex:?0}}") List<Note> findByNameRegex(String name); @Query(value = "{'name':?0}") List<Note...
}//使用mongoTemplate查询@TestpublicvoidfindOne01(){Queryquery=newQuery();//构建查询条件Criteriacriteria=newCriteria(); criteria.and("userName").is("happy9527"); query.addCriteria(criteria);Studentone=mongoTemplate.findOne(query, Student.class); System.out.println("one = "+ one); }//根据age聚...
import org.springframework.data.mongodb.core.CollectionOptions; import org.springframework.data.mongodb.core.MongoTemplate; import org.springframework.data.mongodb.core.query.Criteria; import org.springframework.data.mongodb.core.query.CriteriaDefinition; import org.springframework.data.mongodb.core.valida...
简介:SpringBoot集成spring-data-mongodb 技术点记录 --查询指定字段 spring-data-mongodb --查询指定字段 在项目实际应用中记录mongodb查询指定字段,优化性能问题避免查询其他非必要字段 代码: @RepositorypublicinterfaceMsgRecordRepositoryextendsMongoRepository<MsgCollection,String>{@Query(fields="{'message.msgId' :...
core.query.Criteria; import org.springframework.data.mongodb.core.query.Query; import org.springframework.data.mongodb.repository.query.MongoEntityInformation; import org.springframework.data.mongodb.repository.support.SimpleMongoRepository; import java.io.Serializable; import java.util.List; /** * ...
domain.Sort;importorg.springframework.data.mongodb.core.MongoTemplate;importorg.springframework.data.mongodb.core.query.Criteria;importorg.springframework.data.mongodb.core.query.Query;importorg.springframework.data.mongodb.core.query.SerializationUtils;importorg.springframework.data.mongodb.core.query....
Actually I had a weird behaviour in my application. Is totally random and happened to me 2/3 times that a RESTFul endpoint with just one query to MongoDB, it just stuck. The connection time and the socket time as per the connection string wasn't respected, no errors and no logs. The...
Failed query request: demo_1 | 2021-10-27 06:11:57.982 INFO 1 --- [or-http-epoll-2] org.mongodb.driver.cluster : No server chosen by com.mongodb.reactivestreams.client.internal.ClientSessionHelper$$Lambda$1458/0x000000080130dc30@63c1fe3e from cluster description ClusterDescription{type=UNKNO...