#dbref cannot create a reference to an object with a null id - spring
I'm working with spring boot and mongodb while trying to persist data with relation (OneToMany) I get this error:
org.springframework.data.mapping.MappingException: Cannot create a reference to an object with a NULL id.
My Enteties:
public class ReleveBancaireEntity implements Serializable {
#Id
private ObjectId id;
#CreatedDate
#DateTimeFormat(iso = ISO.DATE_TIME)
private Date dateReception;
#DBRef
private List<LigneReleveEntity> lignereleve = new ArrayList<>();
}
public class LigneReleveEntity {
#Id
private ObjectId id;
#CreatedDate
#DateTimeFormat(iso = ISO.DATE_TIME)
private Date dateOperation;
#CreatedDate
#DateTimeFormat(iso = ISO.DATE_TIME)
private Date dateValue;
private ObjectId releveBancaireId;
}
Saving data to MongoDB:
public void addReleveBancaire(ReleveBancaireDTO releveBancaire) {
ReleveBancaireEntity releveBancaireEntity = mapper.map(releveBancaire,ReleveBancaireEntity.class);
List<LigneReleveEntity> ligneReleveEntities = ObjectMapperUtils.mapAll(releveBancaire.getLignereleve(),LigneReleveEntity
.class);
ligneReleveEntities.forEach(ligneReleveEntity ->
ligneReleveEntity.setReleveBancaireId(releveBancaireEntity.getId()));
releveBancaireEntity.setLignereleve(ligneReleveEntities);
releveBancaireRepository.save(releveBancaireEntity);
ligneReleveRepository.saveAll(ligneReleveEntities);
}
Related
how to add object with fk to table in jparepository
i had scheme of user parking and detail parking.
user can park many times (one to many)
im trying to add detail parking object to my db, but i dont have idea how to add the fk from the user in the row of the table, its gave me null there.
(ignore from the logic of the model, i just want to understood the logic how can i the object with fk of ther entity)
this is my code:
#PostMapping("/parking")
public String saveCarParking(#ModelAttribute("user") parkingUsers parkingUsers) {
// parkingUsers[id, firstName, lastName, license]
parkingUsers p = new parkingUsers("jhon", "nash", "248651355");
parkingUsersService.saveParkingUser(p);
// parkingDetails[id, entryDate, entryTime, exitDate, exitTime, user_id(FK)]
parkingDetails d = new parkingDetails(LocalDate.now(), null, LocalDate.now(), null);
parkingDetailsService.saveParkingUser(d);
//how i connect parkingDetails object with fk of parkingUsers?
//it adding now row of parkingDetails but without the fk of user
return "redirect:/parkingList";
}
parking user entity:
#Entity
#Table(name ="users")
public class parkingUsers {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
private int id;
#Column(name = "first_name")
private String firstName;
#Column(name = "last_name")
private String lastName;
#Column(name = "license")
private String license;
#OneToMany(mappedBy = "parkingUsers", cascade = CascadeType.ALL, orphanRemoval = true)
private List<parkingDetails> parkingDetails = new ArrayList<parkingDetails>();
public parkingUsers() {
}
public parkingUsers(String firstName, String lastName, String license) {
this.firstName = firstName;
this.lastName = lastName;
this.license = license;
}
//setter gettrs and tostring...
entity class of details parking
#Entity
#Table(name ="details")
public class parkingDetails {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
private int id;
#Column(name = "entry_date")
private LocalDate entryDate;
#Column(name = "entry_time")
private LocalDateTime entryTime;
#Column(name = "exit_date")
private LocalDate exitDate;
#Column(name = "exit_time")
private LocalDateTime exitTime;
#ManyToOne
#JoinColumn(name="user_id")
private parkingUsers parkingUsers;
public parkingDetails() {}
public parkingDetails(LocalDate entryDate, LocalDateTime entryTime, LocalDate exitDate, LocalDateTime exitTime) {
this.entryDate = entryDate;
this.entryTime = entryTime;
this.exitDate = exitDate;
this.exitTime = exitTime;
}
//test
// public parkingDetails(LocalDate entryDate, LocalDateTime entryTime, LocalDate exitDate, LocalDateTime exitTime, int user_id ) {
// this.entryDate = entryDate;
// this.entryTime = entryTime;
// this.exitDate = exitDate;
// this.exitTime = exitTime;
// this.parkingUsers.setId(user_id);
// }
//setter gettrs and tostring...
In the ParkingDetails entity, you can have a setter for "parkingUsers" variable to set user object. In your REST api's saveCarParking() method, before calling "parkingDetailsService.saveParkingUser(d);" you can pass the user object to ParkingDetails using setter created in ParkingDetails. This should work. No need to explicitly extract the user_id from user's object to pass into ParkingDetails. Adding one more parameter of type ‘parkingUsers‘ in the constructor of ‘ ParkingDetails’ to initialize user in parking class will also work. (Apart, it is a good practice to start the class name with a capital letter e.g. instead of having class name as parkingDetails, it should be ParkingDetails.)
Spring data jpa CRUDRepository/ JPArepository saveall can not get id (non primary key)
I am fetching data from FB marketing API and trying to save in DB. I am able to save data in the DB using CrudRepository or JpaRepository -> saveall method, but when trying to fetch the id in response of saveall, I am getting id as null. When I see in the h2-console, able to see the auto increment value after the completion of transaction.
Note: id is not used as primary key #Id. accountId is used as primary key.
Model:
#Entity
#Table(name = "accounts")
#Data
#ToString(onlyExplicitlyIncluded = true)
public class Account implements Serializable{
#JsonIgnore
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(columnDefinition = "integer auto_increment",insertable = false)
private Long id;
#JsonProperty("account_id")
#Column(name = "account_id")
#Id
private String accountId;
#Column(name = "account_status")
private int accountStatus;
#JsonProperty("timezone_id")
#Column(name = "timezone_id")
private int timezoneId;
private int timezoneOffsetUtc;
private String currency;
#Column(name = "timezone_name")
#JsonProperty("timezone_name")
private String timezoneName;
private String name;
#Column(name = "created_on",nullable = false, updatable = false)
#CreationTimestamp
private LocalDateTime createdOn;
#Column(name = "updated_on")
#UpdateTimestamp
private LocalDateTime updatedOn;
}
Repository:
#Repository()
public interface AccountRepository extends CrudRepository<Account, String> {
}
Tried with JpaRepository<Account, Long> too and flush after saving..but still getting id null in return list response of saveall()
Service:
#Service
public class AccountsService {
#Autowired
private AccountRepository repository;
#Override
#Transactional
public List<Account> saveAll(List<Account> accounts) {
//in case of JpaRepository
List<Account> savedAccounts= repository.saveAll(accounts);
repository.flush();
return savedAccounts;
//in case of CrudRepository
return (List<Account>)repository.saveAll(accounts);
}
}
when executing this
//accountsList received from FB API
List<Account> savedList=iAccountsService.saveAll(accountsList);
savedList.get(0).getId() **//this is coming as null**
Any sort of help is appreciated.
In your entity class :
Use this #GeneratedValue(strategy = GenerationType.IDENTITY)
public class Account implements Serializable{
#JsonIgnore
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(unique = true, nullable = false, insertable = false, updatable = false)
private Long id;
}
Auto populate created_date, last_modified_date, created_by and last_modified_by in entity : Hibernate with JPA
I am new to Hibernate and JPA. I have several entities, each of which contains following four columns:
1. created_by
2. last_modified_by
3. created_date
4. last_modified_date
I would like these columns to get auto-populated while saving the associated entity.
Two sample entities are as follows:
Entity 1:
#Entity
#Table(name = "my_entity1")
#Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
public class MyEntity1 implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#Column(name = "name")
private String name;
#Column(name = "created_by")
private String createdBy;
#Column(name = "last_modified_by")
private String lastModifiedBy;
#Column(name = "created_date")
private Instant createdDate;
#Column(name = "last_modified_date")
private String lastModifiedDate;
}
Entity 2:
#Entity
#Table(name = "my_entity2")
#Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
public class MyEntity2 implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#Column(name = "description")
private String description;
#Column(name = "created_by")
private String createdBy;
#Column(name = "last_modified_by")
private String lastModifiedBy;
#Column(name = "created_date")
private Instant createdDate;
#Column(name = "last_modified_date")
private String lastModifiedDate;
}
In this context, I have gone through following posts: How to autogenerate created or modified timestamp field?, How can you make a created_at column generate the creation date-time automatically like an ID automatically gets created?.
I am getting how to capture the dates fields but I cannot understand how to capture created_by and last_modified_by.
Auditing Author using AuditorAware and Spring Security...
To tell JPA about currently logged in user we will need to provide an
implementation of AuditorAware and override getCurrentAuditor()
method. And inside getCurrentAuditor() we will need to fetch currently
logged in user.
Like this:
public class AuditorAwareImpl implements AuditorAware<String> {
#Override
public String getCurrentAuditor() {
return "TestUser";
// Can use Spring Security to return currently logged in user
// return ((User) SecurityContextHolder.getContext().getAuthentication().getPrincipal()).getUsername()
}
}
Now enable jpa auditing by using #EnableJpaAuditing
#Configuration
#EnableJpaAuditing(auditorAwareRef = "auditorAware")
public class JpaConfig {
#Bean
public AuditorAware<String> auditorAware() {
return new AuditorAwareImpl();
}
}
Look at this to get more details....
Return type of JPA Repository 'getOne(id)' Method
I have the following Spring boot service for an object of type Report -
#Service
public class ReportService {
#Autowired
private ReportRepository reportRepository;
#Autowired
private UserRepository userRepository;
/*get all reports */
public List<Report> getAllReports(){
return reportRepository.findAll();
}
/*get a single report */
public Report getReport(Long id){
return reportRepository.getOne(id);
}
//other similar methods....
}
The problem arises while retrieving a single Report. If a report ID is send which doesn't exist, the following error is generated...
DefaultHandlerExceptionResolver : Failed to write HTTP message:
org.springframework.http.converter.HttpMessageNotWritableException: Could not
write JSON: Unable to find com.interact.restapis.model.Report with id 16;
nested exception is com.fasterxml.jackson.databind.JsonMappingException:
Unable to find com.interact.restapis.model.Report with id 16 (through
reference chain:
com.interact.restapis.model.Report_$$_jvst83c_1["fromUserId"])
Below is the code for my Report Controller
#RestController
public class ReportController {
#Autowired
private ReportService reportService;
//Get all reports
#GetMapping("/interactions")
public List<Report> getAllReports() {
return reportService.getAllReports();
}
//Get single report
#GetMapping("/interactions/{id}")
public ResponseEntity<Report> getReport(#PathVariable Long id) {
if(reportService.getReport(id) == null)
return new ResponseEntity<>(HttpStatus.NOT_FOUND);
return new ResponseEntity<>(reportService.getReport(id), HttpStatus.OK);
}
#PostMapping("/interactions")
public ResponseEntity<Report> addReport(#RequestBody Report report) {
Report report1 = reportService.addReport(report);
if(report1 == null)
return new ResponseEntity<>(report, HttpStatus.NOT_FOUND);
return new ResponseEntity<>(report1, HttpStatus.OK);
}
//Other request methods...
}
Below is the code for my Report Model class -
#Entity
#Table (name = "report")
#EntityListeners(AuditingEntityListener.class)
#JsonIgnoreProperties({"hibernateLazyInitializer", "handler"})
public class Report {
#Id
#Column (name = "id")
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
#Column(name = "from_user_id")
private Long fromUserId;
#Column(name = "to_user_id")
private Long toUserId;
#Column(name = "to_user_email")
private String toUserEmail;
#Column(name = "from_user_email")
private String fromUserEmail;
#Temporal(TemporalType.DATE)
#JsonFormat(pattern = "dd-MM-yyyy hh:mm:ss")
#CreatedDate
private Date createdAt;
#Column(nullable = false)
private String observation;
#Column(nullable = false)
private String context;
private String recommendation;
#Column(nullable = false)
private String eventName;
#Temporal(TemporalType.DATE)
#JsonFormat(pattern = "dd-MM-yyyy hh:mm:ss")
#Column(nullable = false)
private Date eventDate;
private boolean isAnonymous;
#Temporal(TemporalType.DATE)
#JsonFormat(pattern = "dd-MM-yyyy hh:mm:ss")
private Date acknowledgementDate;
#OneToMany(cascade = CascadeType.ALL, targetEntity = Action.class)
#JoinColumn(name = "report_id")
private List<Action> actionList;
#Value("${some.key:0}")
private int rating; //Range 0 to 4
private int type;
/*
Getter and setter methods...
*/
}
I want to know if reportRepository.getOne(Long id) returns null so that I can actually check if a particular report doesn't exist in the database. If not, how else can I implement the above?
The JpaRepository.getOne with throw EntityNotFoundException if it couldn't find a record with the given id. You can use CrudRepository.findById (JpaRepository is a subclass of CrudRepository) which will return an Optional<Report> which can be empty if there are no record for the given id. You can use Optional.isPresent() to check whether it a Report is available or not and take actions accordingly.
Create a method in your ReportRepository.
It will return Report by matched id else return null.
public Optional<Report> findById(Long id);
Note: findById(Long id); should match with the property name in your Report entity.
I am assuming your Report entity is as follows:
public class Entity{
private Long id;
...
}
Spring 4 ZoneDateTime Restful recursive output
I am new on Java 8 and Spring 4
i have tried to implement spring boot with module (Spring boot web, Spring boot jpa)
i have tried to implement JpaAuditing on my entity with the following code:
//AbstractAuditedEntity.class
#MappedSuperclass
public class AbstractAuditedEntity {
#CreatedBy
#Column(name = "CREATED_BY")
private String createdBy;
// #Type(type="org.joda.time.contrib.hibernate.PersistentDateTime")
#CreatedDate
#DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME)
#Column(name = "CREATED_DATE")
// #Type(type = "org.jadira.usertype.dateandtime.joda.PersistentDateTime")
private ZonedDateTime createdDate;
#LastModifiedBy
#Column(name = "LAST_MODIFIED_BY")
private String lastModifiedBy;
// #Type(type="org.joda.time.contrib.hibernate.PersistentDateTime")
#DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME)
#LastModifiedDate
#Column(name = "LAST_MODIFIED_DATE")
// #Type(type = "org.jadira.usertype.dateandtime.joda.PersistentLocalDateTime")
private ZonedDateTime lastModifiedDate;
/*setter getter are omitted*/
}
and the User entity with the following code :
#Entity
#Table(name = "common_user")
public class User extends AbstractAuditedEntity {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "ID")
private Long id;
/*other fields are omitted*/
}
and my controller :
#RestController
public class UserCtrl {
#Autowired
UserRepository userRepository;
#RequestMapping(value = "/user", method = RequestMethod.GET)
#ResponseBody
public User index() {
User one = userRepository.findOne(1L);
return one;
}
}
the result is of field createdDate and lastModifiedDate are recursive :(
{"createdBy":"SYSTEM","createdDate":{"offset":{"totalSeconds":25200,"rules": {"fixedOffset":true,"transitionRules":[],"transitions":[]},"id":"+07:00"},"zone":{"id":"Asia/Jakarta","rules":{"fixedOffset":false,"transitionRules":[],"transitions":[{"offsetBefore":{"totalSeconds":25632,"rules":{"fixedOffset":true,"transitionRules":[],"transitions":[]},"id":"+07:07:12"},"offsetAfter":{"totalSeconds":26400,"rules":{"fixedOffset":true,"transitionRules":[],"transitions":[]},"id":"+07:20"},"dateTimeAfter":{"hour":0,"minute":0,"nano":0,"second":0,"month":"JANUARY","year":1924,"dayOfMonth":1,"dayOfWeek":"TUESDAY","dayOfYear":1,"monthValue":1,"chronology":{"calendarType":"iso8601","id":"ISO"}},"duration":{"seconds":768,"zero":false,"negative":false,"nano":0,"units":["SECONDS","NANOS"]},"gap":true,"overlap":false,"dateTimeBefore":{"hour":23,"minute":47,"nano":0,"second":12,"month":"DECEMBER","year":1923,"dayOfMonth":31,"dayOfWeek":"MONDAY","dayOfYear":365,"monthValue":12,"chronology":{"calendarType":"iso8601","id":"ISO"}},"instant":{"epochSecond":-1451719200,"nano":0}},{"offsetBefore":{"totalSeconds":26400,"rules":{"fixedOffset":true,"transitionRules":[],"transitions":[]},"id":"+07:20"},"offsetAfter":{"totalSeconds":27000,"rules":{"fixedOffset":true,"transitionRules":[],"transitions":[]},"id":"+07:30"},"dateTimeAfter":{"hour":0,"minute":10,"nano":0,"second":0,"month":"NOVEMBER","year":1932,"dayOfMonth":1,"dayOfWeek":"TUESDAY","dayOfYear":306,"monthValue":11,"chronology":{"calendarType":"iso8601","id":"ISO"}},"duration":{"seconds":600,"zero":false,"negative":false,"nano":0,"units":["SECONDS","NANOS"]},"gap":true,"overlap":false,"dateTimeBefore":{"hour":0,"minute":0,"nano":0,"second":0,"month":"NOVEMBER","year":1932,"dayOfMonth":1,"dayOfWeek":"TUESDAY","dayOfYear":306,"monthValue":11,"chronology":{"calendarType":"iso8601","id":"ISO"}},"instant":{"epochSecond":-1172906400,"nano":0}},{"offsetBefore":{"totalSeconds":27000,"rules":{"fixedOffset":true,"transitionRules":[],"transitions":[]},"id":"+07:30"},"offsetAfter":{"totalSeconds":32400,"rules":{"fixedOffset":true,"transitionRules":[],"transitions":[]},"id":"+09:00"},"dateTimeAfter":{"hour":1,"minute":30,"nano":0,"second":0,"month":"MARCH","year":1942,"dayOfMonth":23,"dayOfWeek":"MONDAY","dayOfYear":82,"monthValue":3,"chronology":{"calendarType":"iso8601","id":"ISO"}},"duration":{"seconds":5400,"zero":false,"negative":false,"nano":0,"units":["SECONDS","NANOS"]},"gap":true,"overlap":false,"dateTimeBefore":{"hour":0,"minute":0,"nano":0,"second":0,"month":"MARCH","year":1942,"dayOfMonth":23,"dayOfWeek":"MONDAY","dayOfYear":82,"monthValue":3,"chronology":{"calendarType":"iso8601","id":"ISO"}},"instant":{"epochSecond":-876641400,"nano":0}},{"offsetBefore":{"totalSeconds":32400,"rules":{"fixedOffset":true,"transitionRules":[],"transitions":[]},"id":"+09:00"},"offsetAfter":{"totalSeconds":27000,"rules":{"fixedOffset":true,"transitionRules":[],"transitions":[]},"id":"+07:30"},"dateTimeAfter":{"hour":22,"minute":30,"nano":0,"second":0,"month":"SEPTEMBER","year":1945,"dayOfMonth":22,"dayOfWeek":"SATURDAY","dayOfYear":265,"monthValue":9,"chronology":{"calendarType":"iso8601","id":"ISO"}},"duration":{"seconds":-5400,"zero":false,"negative":true,"nano":0,"units":["SECONDS","NANOS"]},"gap":false,"overlap":true,"dateTimeBefore":{"hour":0,"minute":0,"nano":0,"second":0,"month":"SEPTEMBER","year":1945,"dayOfMonth":23,"dayOfWeek":"SUNDAY","dayOfYear":266,"monthValue":9,"chronology":{"calendarType":"iso8601","id":"ISO"}},"instant":{"epochSecond":-766054800,"nano":0}},{"offsetBefore":{"totalSeconds":27000,"rules":{"fixedOffset":true,"transitionRules":[],"transitions":[]},"id":"+07:30"},"offsetAfter":{"totalSeconds":28800,"rules":{"fixedOffset":true,"transitionRules":[],"transitions":[]},"id":"+08:00"},"dateTimeAfter":{"hour":0,"minute":30,"nano":0,"second":0,"month":"MAY","year":1948,"dayOfMonth":1,"dayOfWeek":"SATURDAY","dayOfYear":122,"monthValue":5,"chronology":{"calendarType":"iso8601","id":"ISO"}},"duration":{"seconds":1800,"zero":false,"negative":false,"nano":0,"units":["SECONDS","NANOS"]},"gap":true,"overlap":false,"dateTimeBefore":{"hour":0,"minute":0,"nano":0,"second":0,"month":"MAY","year":1948,"dayOfMonth":1,"dayOfWeek":"SATURDAY","dayOfYear":122,"monthValue":5,"chronology":{"calendarType":"iso8601","id":"ISO"}},"instant":{"epochSecond":-683883000,"nano":0}},{"offsetBefore":{"totalSeconds":28800,"rules":{"fixedOffset":true,"transitionRules":[],"transitions":[]},"id":"+08:00"},"offsetAfter":{"totalSeconds":27000,"rules":{"fixedOffset":true,"transitionRules":[],"transitions":[]},"id":"+07:30"},"dateTimeAfter":{"hour":23,"minute":30,"nano":0,"second":0,"month":"APRIL","year":1950,"dayOfMonth":30,"dayOfWeek":"SUNDAY","dayOfYear":120,"monthValue":4,"chronology":{"calendarType":"iso8601","id":"ISO"}},"duration":{"seconds":-1800,"zero":false,"negative":true,"nano":0,"units":["SECONDS","NANOS"]},"gap":false,"overlap":true,"dateTimeBefore":{"hour":0,"minute":0,"nano":0,"second":0,"month":"MAY","year":1950,"dayOfMonth":1,"dayOfWeek":"MONDAY","dayOfYear":121,"monthValue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How to format ZoneDateTime in the Restful ?thanks before
That's not actually recursive; you can see for yourself by posting that json string into http://jsonformatter.curiousconcept.com/.
If you want to use ZonedDateTime and you don't want all of its properties converted to JSON, you might add #JsonIgnore to the field and then adding getters for each field that you want. For example:
#JsonIgnore
#CreatedDate
#DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME)
#Column(name = "CREATED_DATE")
private ZonedDateTime createdDate;
public Month getMonthCreated(){
return createdDate.getMonth();
}