Я использую данные Spring для подключения к mongodb. Пожалуйста, смотрите мои проблемы ниже:
Теперь у меня есть две модели данных (пользовательская и черновая):
@Document
public class User implements Serializable {
@Id
private String id;
private String showName;
private String password;
//..... (other attributes)
@DBRef
private List<Draft> createdDraft = new ArrayList<Draft>();
//constructors
public User() {
super();
}
public User(String id, String showName, String password, //....other attributes
List<Draft> createdDraft) {
super();
this.id = id;
this.showName = showName;
this.password = password;
//....
}
//getters and setters
}
а также
@Document
public class Draft {
@Id
private String id;
private String title;
private Date createTime;
private Date lastEditTime;
@DBRef
private User lastEditor;
@DBRef
private User mainAuthor;
@DBRef
private List<User> coAuthors = new ArrayList<User>();
private String externalURL;
//constructors..
public Draft() {
super();
}
public Draft(String id, String title, Date createTime, Date lastEditTime,
User lastEditor, User mainAuthor, String externalURL) {
super();
this.id = id;
this.title = title;
this.createTime = createTime;
this.lastEditTime = lastEditTime;
this.lastEditor = lastEditor;
this.mainAuthor = mainAuthor;
this.externalURL = externalURL;
}
//getters and setters...
}
В моем проекте я успешно создал пользователя, поэтому я хотел бы добавить черновик к существующему пользователю.
public String CreateNewDraft(User mainAuthor)
{
Draft draft = new Draft();
draft.setMainAuthor(mainAuthor);
Date now = new Date(System.currentTimeMillis());
draft.setCreateTime(now);
mainAuthor.getCreatedDraft().add(draft);
//insert the draft --> Successful (1)
mongoOps.insert(draft);
//update the user --> Successful (2)
mongoOps.save(mainAuthor);
//find the last inserted draft. --> Errors.
Draft d = mongoOps.findOne(query(where("createTime").is(now) ), Draft.class);
return d.getId()
}
В (1) я нашел новый проект документа, созданный в mongoDB, который имеет _id = 52a1591597d738f7b397be96.
В (2) я обнаружил, что в существующем документе пользователя (mainAuhtor) в поле createdDraft добавлена одна запись, например [ { $ref : draft , $id : { $oid : 52a1591597d738f7b397be96}}]
Исключение и журнал:
processing failed; nested exception is java.lang.StackOverflowError org.springframework.web.servlet.DispatcherServlet. doDispatch(DispatcherServlet.java:972) org.springframework.web.servlet.DispatcherServlet. doService(DispatcherServlet.java:852) org.springframework.web.servlet.FrameworkServlet.p rocessRequest(FrameworkServlet.java:882) org.springframework.web.servlet.FrameworkServlet.d oGet(FrameworkServlet.java:778) javax.servlet.http.HttpServlet.service(HttpServlet .java:621) javax.servlet.http.HttpServlet.service(HttpServlet .java:728) org.apache.tomcat.websocket.server.WsFilter.doFilt er(WsFilter.java:51)
основная причина
java.lang.StackOverflowError java.net.SocketInputStream.socketRead0(Native Method) java.net.SocketInputStream.read(Unknown Source) java.net.SocketInputStream.read(Unknown Source) java.io.BufferedInputStream.fill(Unknown Source) java.io.BufferedInputStream.read1(Unknown Source) java.io.BufferedInputStream.read(Unknown Source) org.bson.io.Bits.readFully(Bits.java:46) org.bson.io.Bits.readFully(Bits.java:33) org.bson.io.Bits.readFully(Bits.java:28) com.mongodb.Response.<init>(Response.java:40) com.mongodb.DBPort.go(DBPort.java:124) com.mongodb.DBPort.call(DBPort.java:74) com.mongodb.DBTCPConnector.innerCall(DBTCPConnecto r.java:286) com.mongodb.DBTCPConnector.call(DBTCPConnector.jav a:257) com.mongodb.DBApiLayer$MyCollection.__find(DBApiLa yer.java:310) com.mongodb.DBApiLayer$MyCollection.__find(DBApiLa yer.java:295) com.mongodb.DBCollection.findOne(DBCollection.java :346) com.mongodb.DBCollection.findOne(DBCollection.java :331) com.mongodb.DBRefBase.fetch(DBRefBase.java:53) org.springframework.data.mongodb.core.convert.Mapp ingMongoConverter.readValue(MappingMongoConverter. java:1046) org.springframework.data.mongodb.core.convert.Mapp ingMongoConverter.access$100(MappingMongoConverter .java:77) org.springframework.data.mongodb.core.convert.Mapp ingMongoConverter$MongoDbPropertyValueProvider.get PropertyValue(MappingMongoConverter.java:999) org.springframework.data.mongodb.core.convert.Mapp ingMongoConverter.getValueInternal(MappingMongoCon verter.java:755) org.springframework.data.mongodb.core.convert.Mapp ingMongoConverter$2.doWithAssociation(MappingMongo Converter.java:265) org.springframework.data.mapping.model.BasicPersis tentEntity.doWithAssociations(BasicPersistentEntit y.java:269) org.springframework.data.mongodb.core.convert.Mapp ingMongoConverter.read(MappingMongoConverter.java: 262) org.springframework.data.mongodb.core.convert.Mapp ingMongoConverter.read(MappingMongoConverter.java: 223) org.springframework.data.mongodb.core.convert.Mapp ingMongoConverter.readCollectionOrArray(MappingMon goConverter.java:788) org.springframework.data.mongodb.core.convert.Mapp ingMongoConverter.readValue(MappingMongoConverter. java:1048) org.springframework.data.mongodb.core.convert.Mapp ingMongoConverter.access$100(MappingMongoConverter .java:77) org.springframework.data.mongodb.core.convert.Mapp ingMongoConverter$MongoDbPropertyValueProvider.get PropertyValue(MappingMon```
Может ли кто-нибудь помочь мне взглянуть? Большое спасибо!