Mongodb使用总结 - ToB企服应用市场:ToB评测及商务社交产业平台

@Document("wf_process")
@Data
@NoArgsConstructor
@FieldNameConstants
public class ProcessDefinition implements SynchronizerSign {
/**
* 流程ID
*/
@Id //与数据库_id映射，@Document("wf_process")
@Indexed(unique = true)索引3
@JsonSerialize(using = ToStringSerializer.class) 精度丢失
private Long procId;

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//增加文档
ProcessDefinition resProcess = mongoTemplate.insert(wfProcess);
//改
Query query = new Query();
Update update = new Update();
Criteria criteriaOne = Criteria.where(ProcessDefinition.Fields.procId).is(processVo.getProcId());//找到文档
update.set(ProcessDefinition.Fields.procName, procName);//修改的属性
mongoTemplate.updateMulti(query,update,ProcessDefinition.class);//批量修改
//查询
ProcessDefinition wfProcess = mongoTemplate.findOne(query, ProcessDefinition.class);//find查询满足条件的文档集合
//删除逻辑删除 update 物理删除 remove
//query.fields进行字段过滤

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Query query = new Query();
Update update = new Update();
query.addCriteria(Criteria.where(ProcessDefinition.Fields.procId).is(pub.getProcId()));//找到文档
//添加元素到数组 addToSet去重
update.addToSet(ProcessDefinition.Fields.flowNodes,pub);
mongoTemplate.upsert(query,update,ProcessDefinition.class);//upsert 找不到文档时会自动创建文档
//不去重效率高
update.push("likes").each(objects);
//更新数组元素
Criteria.where(ProcessDefinition.Fields.flowNodes).
elemMatch(Criteria.where(PublicFlowNode.Fields.nodeId).is(pub.getNodeId())));//elemMatch找到数组元素 flowNodes.nodeID = nodeID
update.set("flowNodes.$",pub);//$获取到的元素
query.addCriteria(Criteria.where(ProcessInstanceData.Fields.dataId)
.is(dataId)
.and("instanceData.flowNodeId")
.is(deleteId));
mongoTemplate.updateFirst(query,update,ProcessDefinition.class);
//更新数组元素某个属性
update.set("flowNodes.$.nextId", nodeId);
//获取数组中的元素
query.fields().elemMatch(ProcessInstanceData.Fields.instanceData,
Criteria.where(InstanceData.Fields.flowNodeId).
is(nodeId));//fields()过滤字段
ProcessInstanceData processInstanceData = mongoTemplate.findOne(query, ProcessInstanceData.class);
List<InstanceData> instanceDatas = processInstanceData.getInstanceData();
instanceDatas.get(0);
//获取数组中的指定几个元素
//封装对象列表查询条件
List<AggregationOperation> commonOperations = new ArrayList<>();
//1. 指定查询主文档
MatchOperation match = Aggregation.match(Criteria.where(ProcessInstanceData.Fields.dataId).
is(dataId));
commonOperations.add(match);
//2. 指定投影，返回哪些字段
ProjectionOperation project = Aggregation.project(ProcessInstanceData.Fields.instanceData);
commonOperations.add(project);
//3. 拆分内嵌文档, 可以查询需要的记录
UnwindOperation unwind = Aggregation.unwind(ProcessInstanceData.Fields.instanceData);
commonOperations.add(unwind);
//4. 指定查询指定几个数组元素
MatchOperation match2 = Aggregation.match(
Criteria.where("instanceData.flowNodeId").in(nodeIds));
commonOperations.add(match2);
//5.创建管道查询对象
Aggregation aggregation = Aggregation.newAggregation(commonOperations);
AggregationResults<JSONObject> aggregate = mongoTemplate
.aggregate(aggregation, ProcessInstanceData.class, JSONObject.class);
//删除数组元素
instanceData = 删除的对象
update.pull(ProcessInstanceData.Fields.instanceData,instanceData);

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