I'm writing a site of a hospital. This is an MVC application with database. Database contains data about patients, doctors etc.
I need to get List of doctors which should be sorted by patient count. I have already tried to do this with Comparator inside Java code like this example:
Page<Doctor> pageDoctor = doctorRepository.findAll(pageable);
List<Doctor> doctorList = pageDoctor.getContent();
doctorList.sort(Comparator.comparing(o -> patientRepository.findAllByDoctor(o).size()));
but I need the sorted list inside Page content. I don't really understand how to make the query equivalent to this example, because I'm new to SQL. Here are my entity and repository classes.
Doctor.java
#Entity
#Table(name = "doctors")
public class Doctor {
#Id
#Column(name = "id", nullable = false, unique = true)
#SequenceGenerator(name="doctors_generator", sequenceName = "doctors_id_seq", allocationSize = 1)
#GeneratedValue(strategy = GenerationType.AUTO, generator = "doctors_generator")
private Long id;
#OneToOne(fetch = FetchType.EAGER)
#JoinColumn(name = "user_id")
private User user;
#ManyToOne(fetch = FetchType.EAGER)
#JoinColumn(name = "doctors_type_id")
private DoctorsType doctorsType;
public Doctor(User user, DoctorsType doctorsType) {
this.user = user;
this.doctorsType = doctorsType;
}
public Doctor() {
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
public DoctorsType getDoctorsType() {
return doctorsType;
}
public void setDoctorsType(DoctorsType doctorsType) {
this.doctorsType = doctorsType;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
}
Patient.java
#Entity
#Table(name = "patients")
public class Patient {
#Id
#Column(name = "id", nullable = false, unique = true)
#SequenceGenerator(name="patients_generator", sequenceName = "patients_id_seq", allocationSize = 1)
#GeneratedValue(strategy = GenerationType.AUTO, generator = "patients_generator")
private Long id;
#OneToOne(fetch = FetchType.EAGER)
#JoinColumn(name = "user_id")
private User user;
#ManyToOne(fetch = FetchType.EAGER)
#JoinColumn(name = "doctor_id")
private Doctor doctor;
#ManyToOne(fetch = FetchType.EAGER)
#JoinColumn(name = "treatment_id")
private Treatment treatment;
public Patient(User user, Doctor doctor, Treatment treatment) {
this.user = user;
this.doctor = doctor;
this.treatment = treatment;
}
public Patient() {
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
public Doctor getDoctor() {
return doctor;
}
public void setDoctor(Doctor doctor) {
this.doctor = doctor;
}
public Treatment getTreatment() {
return treatment;
}
public void setTreatment(Treatment treatment) {
this.treatment = treatment;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
}
PatientRepository.java
#Repository
public interface PatientRepository extends JpaRepository<Patient, Long> {
Patient findPatientByUser(User user);
List<Patient> findAllByDoctor(Doctor doctor);
Patient findPatientById(long id);
Page<Patient> findAllByOrderByIdAsc(Pageable pageable);
List<Patient> findAllByOrderByIdAsc();
}
DoctorRepository.java
#Repository
public interface DoctorRepository extends JpaRepository<Doctor, Long> {
Doctor findDoctorById(long id);
Doctor findDoctorByUser(User user);
#Query(
//sql query there
)
Page<Doctor> findAllByPatientCountAsc(Pageable pageable);
Page<Doctor> findAll(Pageable pageable);
List<Doctor> findAllByOrderByIdAsc();
List<Doctor> findAllByDoctorsTypeNot(DoctorsType doctorsType);
List<Doctor> findAllByDoctorsType(DoctorsType doctorsType);
}
Thanks for your answers in advance.
Check this one:
SELECT d FROM Doctor d,
LEFT JOIN Patient p ON d.id = p.doctor.id
GROUP BY d
ORDER BY COUNT(p.id)
I have a problem with my multiselect. I'm using it as an Specification with multiple joins. I don't know why hibernate decides to put a dot in the query. the error is shown below in the query. this is the constructor I'm using
public HelperOutput(Long id,
String personName,
Long helperTypeId,
String helperTypeTitle,
String agencyTitle,
String regionalOfficeTitle,
String basketPartTitle,
YesNo allowedToOperate,
YesNo hasFlatTirePack,
Long fleetRescueId,
Long cityId,
String cityName,
Long skillLevel,
String helperRankTitle,
Long personId,
Long helperRate,
String personelId,
Long regionalOfficeId,
Long basketPartId,
String mobile,
String fleetName,
ExpertType expertType,
Long maxConcurrentWork,
Set<Long> dutyCityIds
) {
this.id = id;
this.helperTypeId = helperTypeId;
this.helperTypeTitle = helperTypeTitle;
this.agencyTitle = agencyTitle;
this.regionalOfficeId = regionalOfficeId;
this.regionalOfficeTitle = regionalOfficeTitle;
this.basketPartTitle = basketPartTitle;
this.fleetRescueId = fleetRescueId;
this.cityId = cityId;
this.helperRankTitle = helperRankTitle;
this.personId = personId;
this.basketPartId = basketPartId;
this.mobile = mobile;
this.fleetName = fleetName;
this.cityName = cityName;
this.personName = personName;
this.allowedToOperate = allowedToOperate;
this.hasFlatTirePack = hasFlatTirePack;
this.skillLevel = skillLevel;
this.helperRate = helperRate;
this.personelId = personelId;
this.expertType = expertType;
this.maxConcurrentWork = maxConcurrentWork;
this.dutyCityIds = dutyCityIds;
}
this is the multiselect which is similar to the constructor.
cq.multiselect(root.get(Helper_.ID),
personName,
helperHelperTypeJoin.get(HelperType_.ID),
helperHelperTypeJoin.get(HelperType_.TITLE),
helperAgencyJoin.get(Agency_.TITLE),
helperRegionalOfficeJoin.get(RegionalOffice_.TITLE)
, helperBasketPartJoin.get(Basket_.TITLE),
root.get(Helper_.ALLOWED_TO_OPERATE),
root.get(Helper_.HAS_FLAT_TIRE_PACK),
fleetRescueJoin.get(HelperFleet_.ID),
helperCityJoin.get(City_.ID) ,
helperCityJoin.get(City_.NAME),
root.get(Helper_.SKILL_LEVEL),
helperRankJoin.get(HelperRank_.NAME),
helperPersonJoin.get(Person_.ID),
root.get(Helper_.helperRate),
root.get(Helper_.personelId),
helperRegionalOfficeJoin.get(RegionalOffice_.ID),
helperBasketPartJoin.get(Basket_.ID),
helperPersonJoin.get(Person_.MOBILE),
HelperFleetJoin.get(Fleet_.NAME),
root.get(Helper_.EXPERT_TYPE),
root.get(Helper_.MAX_CONCURRENT_WORK),
root.get(Helper_.DUTY_CITIES)
);
this is the hibernate query which I don't know why it has a dot.
select
*
from
( select
helper0_.ID as col_0_0_,
person3_.NAME as col_1_0_,
helpertype7_.ID as col_2_0_,
helpertype7_.TITLE as col_3_0_,
agency2_.TITLE as col_4_0_,
regionalof8_.TITLE as col_5_0_,
basket6_.TITLE as col_6_0_,
helper0_.ALLOWED_TO_OPERATE as col_7_0_,
helper0_.HAS_FLAT_TIRE_PACK as col_8_0_,
helperflee4_.ID as col_9_0_,
city1_.ID as col_10_0_,
city1_.NAME as col_11_0_,
helper0_.SKILL_LEVEL as col_12_0_,
helperrank9_.NAME as col_13_0_,
person3_.ID as col_14_0_,
helper0_.HELPER_RATE as col_15_0_,
helper0_.PERSONELID as col_16_0_,
regionalof8_.ID as col_17_0_,
basket6_.ID as col_18_0_,
person3_.MOBILE as col_19_0_,
fleet5_.NAME as col_20_0_,
helper0_.EXPERT_TYPE as col_21_0_,
helper0_.MAX_CONCURRENT_WORK as col_22_0_,
. as col_23_0_ <----------- this causes the problem
from
OPR.TBL_HELPER helper0_
left outer join
OPR.TBL_CITY city1_
on helper0_.CITY_ID=city1_.ID
left outer join
TBL_AGENCY agency2_
on helper0_.AGENCY_ID=agency2_.ID
left outer join
OPR.TBL_PERSONS person3_
on helper0_.PERSON_ID=person3_.ID
left outer join
OPR.TBL_HELPER_FLEET helperflee4_
on helper0_.HELPER_FLEET_ID=helperflee4_.ID
left outer join
OPR.NOEKHODROEMDAD fleet5_
on helperflee4_.NOEKHODROEMDAD_ID=fleet5_.NOEKHODROEMDADID
left outer join
OPR.TBL_BASKET basket6_
on helper0_.BASKET_PART_ID=basket6_.ID
left outer join
OPR.TBL_HELPER_TYPE helpertype7_
on helper0_.HELPER_TYPE_ID=helpertype7_.ID
left outer join
TBL_REGIONAL_OFFICE regionalof8_
on helper0_.REGIONAL_OFFICE_ID=regionalof8_.ID
left outer join
OPR.TBL_HELPER_RANK helperrank9_
on helper0_.RANK_HELPER_ID=helperrank9_.ID
left outer join
TBL_HELPER_DUTY_CITIES dutycities10_
on helper0_.ID=dutycities10_.DUTY_CITY_ID
left outer join
OPR.TBL_CITY city11_
on dutycities10_.ESTABLISHMENT_CITY_ID=city11_.ID
inner join
TBL_HELPER_DUTY_CITIES dutycities12_
on helper0_.ID=dutycities12_.DUTY_CITY_ID
where
1=1
and 1=1
order by
helper0_.ALLOWED_TO_OPERATE asc,
person3_.NAME asc )
where
rownum <= ?
and at last I get this error when returning an Specification from the predicates I made.
Error:
2022-01-31 15:40:08.419 [http-nio-8082-exec-2] ERROR o.h.e.jdbc.spi.SqlExceptionHelper - ORA-00936: missing expression
2022-01-31 15:40:08.444 [http-nio-8082-exec-2] ERROR com.eki.opr.config.LoggingAspect - ----> #AfterThrowing method: GenericRepository.findAll(..)
2022-01-31 15:40:08.445 [http-nio-8082-exec-2] ERROR com.eki.opr.config.LoggingAspect - ----> detailedMessage: ORA-00936: missing expression
2022-01-31 15:40:08.445 [http-nio-8082-exec-2] ERROR com.eki.opr.config.LoggingAspect - ----> detailedCause: could not extract ResultSet; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not extract ResultSet
2022-01-31 15:40:08.445 [http-nio-8082-exec-2] ERROR com.eki.opr.config.LoggingAspect - ----> #AfterThrowing method: HelperServiceImpl.findByCriteria(..)
2022-01-31 15:40:08.445 [http-nio-8082-exec-2] ERROR com.eki.opr.config.LoggingAspect - ----> detailedMessage: ORA-00936: missing expression
2022-01-31 15:40:08.445 [http-nio-8082-exec-2] ERROR com.eki.opr.config.LoggingAspect - ----> detailedCause: could not extract ResultSet; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not extract ResultSet
2022-01-31 15:40:08.446 [http-nio-8082-exec-2] ERROR com.eki.opr.config.LoggingAspect - ----> #AfterThrowing method: HelperController.show(..)
2022-01-31 15:40:08.446 [http-nio-8082-exec-2] ERROR com.eki.opr.config.LoggingAspect - ----> detailedMessage: ORA-00936: missing expression
2022-01-31 15:40:08.446 [http-nio-8082-exec-2] ERROR com.eki.opr.config.LoggingAspect - ----> detailedCause: could not extract ResultSet; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not extract ResultSet
EDIT
these are the entities:
#Entity(name = "HELPER")
#Table(name = "TBL_HELPER", schema = "OPR")
#EqualsAndHashCode(exclude = {"person", "agency", "helperType", "regionalOffice", "basket_part", "helperRank"})
#ToString(exclude = {"person", "agency", "helperType", "regionalOffice", "basket_part", "helperRank"})
#AllArgsConstructor
public class Helper implements Serializable {
private Long id;
#GenericGenerator(
name = "assigned-sequence",
strategy = "com.eki.opr.utils.StringSequenceIdentifier"
)
#GeneratedValue(
generator = "assigned-sequence",
strategy = GenerationType.AUTO)
private String largeId;
private Long skillLevel;
private Long currentWorkCount;
private Long maxConcurrentWork;
private YesNo allowedToOperate;
private YesNo hasGps;
private YesNo isAutoDialer;
private YesNo isPartSupply;
private YesNo hasFlatTirePack;
private String imei;
private String address;
private String personelId;
private String reservedMobile;
private Person person;
private HelperFleet helperFleet;
private HelperType helperType;
private RegionalOffice regionalOffice;
private Agency agency;
private Basket basket_part;
private Basket basket_tools;
private YesNo hasPos;
private String posSerial;
private HelperRank helperRank;
private Parameter contractType;
private Set<ServiceType> serviceTypes = new HashSet<ServiceType>();
private Long helperRate;
private ExpertType expertType = ExpertType.HELPER;
public Helper() {
}
private City city;
#JoinColumn(name = "CITY_ID", referencedColumnName = "ID")
#ManyToOne(fetch = FetchType.LAZY)
public City getCity() {
return city;
}
public void setCity(City city) {
this.city = city;
}
private Set<HelperDutyCity> dutyCities = new HashSet<>();
/* in this part mappedBy's value should be changed to helper because the
join must be on helper not dutyCityId*/
#OneToMany(targetEntity = HelperDutyCity.class, mappedBy = "dutyCityId", fetch = FetchType.EAGER)
public Set<HelperDutyCity> getDutyCities() {
return dutyCities;
}
public void setDutyCities(Set<HelperDutyCity> dutyCities) {
this.dutyCities = dutyCities;
}
public void setHelperRate(Long helperRate) {
this.helperRate = helperRate;
}
#Column(name = "HELPER_RATE")
public Long getHelperRate() {
return helperRate;
}
#Id
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "seq_helper")
#SequenceGenerator(name = "seq_helper", sequenceName = "SA.SEQ_EMDADGAR_ID", allocationSize = 1,initialValue = 63442)
#Column(name = "ID")
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
#Column(name = "ADDRESS")
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
#Column(name = "SKILL_LEVEL")
public Long getSkillLevel() {
return skillLevel;
}
public void setSkillLevel(Long skillLevel) {
this.skillLevel = skillLevel;
}
#Column(name = "MAX_CONCURRENT_WORK")
public Long getMaxConcurrentWork() {
return maxConcurrentWork;
}
public void setMaxConcurrentWork(Long maxConcurrentWork) {
this.maxConcurrentWork = maxConcurrentWork;
}
#Column(name = "CURRENT_WORK_COUNT")
public Long getCurrentWorkCount() {
return currentWorkCount;
}
public void setCurrentWorkCount(Long currentWorkCount) {
this.currentWorkCount = currentWorkCount;
}
#Column(name = "ALLOWED_TO_OPERATE")
#Convert(converter = YesNoConverter.class)
public YesNo getAllowedToOperate() {
return allowedToOperate;
}
public void setAllowedToOperate(YesNo allowedToOperate) {
this.allowedToOperate = allowedToOperate;
}
#Column(name = "HAS_GPS")
#Convert(converter = YesNoConverter.class)
public YesNo getHasGps() {
return hasGps;
}
public void setHasGps(YesNo hasGps) {
this.hasGps = hasGps;
}
#Column(name = "PART_SUPPLY")
#Convert(converter = YesNoConverter.class)
public YesNo getIsPartSupply() {
return isPartSupply;
}
public void setIsPartSupply(YesNo isPartSupply) {
this.isPartSupply = isPartSupply;
}
#Column(name = "PERSONELID")
public String getPersonelId() {
return personelId;
}
public void setPersonelId(String personelId) {
this.personelId = personelId;
}
#Column(name = "HAS_FLAT_TIRE_PACK")
#Convert(converter = YesNoConverter.class)
public YesNo getHasFlatTirePack() {
return hasFlatTirePack;
}
public void setHasFlatTirePack(YesNo hasFlatTirePack) {
this.hasFlatTirePack = hasFlatTirePack;
}
#Column(name = "IMEI")
public String getImei() {
return imei;
}
public void setImei(String imei) {
this.imei = imei;
}
#JoinColumn(name = "CREATED_BY", referencedColumnName = "ID")
#ManyToOne(fetch = FetchType.LAZY)
private PersonUnion createdBy;
#Column(name = "CREATED_AT")
private LocalDateTime createdAt;
#Column(name = "IS_AUTO_DIALER")
#Convert(converter = YesNoConverter.class)
public YesNo getIsAutoDialer() {
return isAutoDialer;
}
public void setIsAutoDialer(YesNo isAutoDialer) {
this.isAutoDialer = isAutoDialer;
}
#Column(name = "RESERVED_MOBILE")
public String getReservedMobile() {
return reservedMobile;
}
#Column(name = "HAS_POS")
#Convert(converter = YesNoConverter.class)
public YesNo getHasPos() { return hasPos; }
public void setHasPos(YesNo hasPos) {
this.hasPos = hasPos;
}
#Column(name = "POS_SERIAL")
public String getPosSerial() { return posSerial; }
public void setPosSerial(String posSerial) {
this.posSerial = posSerial;
}
public void setReservedMobile(String reservedMobile) {
this.reservedMobile = reservedMobile;
}
#JoinColumn(name = "MODIFIED_BY", referencedColumnName = "ID")
#ManyToOne(fetch = FetchType.LAZY)
private PersonUnion modifiedBy;
#Column(name = "MODIFIED_AT")
private LocalDateTime modifiedAt;
#OneToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "PERSON_ID", referencedColumnName = "ID")
public Person getPerson() {
return person;
}
public void setPerson(Person person) {
this.person = person;
}
#JoinColumn(name = "HELPER_TYPE_ID", referencedColumnName = "ID")
#ManyToOne(fetch = FetchType.LAZY)
public HelperType getHelperType() {
return helperType;
}
public void setHelperType(HelperType helperType) {
this.helperType = helperType;
}
#JoinColumn(name = "REGIONAL_OFFICE_ID", referencedColumnName = "ID")
#ManyToOne(fetch = FetchType.LAZY)
public RegionalOffice getRegionalOffice() {
return regionalOffice;
}
public void setRegionalOffice(RegionalOffice regionalOffice) {
this.regionalOffice = regionalOffice;
}
#JoinColumn(name = "AGENCY_ID", referencedColumnName = "ID")
#ManyToOne(fetch = FetchType.LAZY)
public Agency getAgency() {
return agency;
}
public void setAgency(Agency agency) {
this.agency = agency;
}
#JoinColumn(name = "BASKET_PART_ID", referencedColumnName = "ID")
#ManyToOne(fetch = FetchType.LAZY)
public Basket getBasket_part() {
return basket_part;
}
public void setBasket_part(Basket basket_part) {
this.basket_part = basket_part;
}
#JoinColumn(name = "BASKET_TOOLS_ID", referencedColumnName = "ID")
#ManyToOne(fetch = FetchType.LAZY)
public Basket getBasket_tools() {
return basket_tools;
}
public void setBasket_tools(Basket basket_tools) {
this.basket_tools = basket_tools;
}
#ManyToOne
#JoinColumn(name = "HELPER_FLEET_ID", referencedColumnName = "ID")
public HelperFleet getHelperFleet() {
return helperFleet;
}
public void setHelperFleet(HelperFleet helperFleet) {
this.helperFleet = helperFleet;
}
#JoinColumn(name = "RANK_HELPER_ID", referencedColumnName = "ID")
#ManyToOne(fetch = FetchType.LAZY)
public HelperRank getHelperRank() {
return helperRank;
}
public void setHelperRank(HelperRank helperRank) {
this.helperRank = helperRank;
}
#Column(name = "LARGE_ID")
public String getLargeId(){return this.largeId;}
public void setLargeId(String largeId){this.largeId = largeId;}
#ManyToMany(fetch = FetchType.LAZY)
#JoinTable(name = "TBL_HELPER_SERVICE_TYPE", uniqueConstraints = {#UniqueConstraint(columnNames = {"HELPER_ID", "SERVICE_TYPE_ID"})},
joinColumns = #JoinColumn(name = "HELPER_ID", referencedColumnName = "ID"),
inverseJoinColumns = #JoinColumn(name = "SERVICE_TYPE_ID", referencedColumnName = "ID"))
public Set<ServiceType> getServiceTypes() {
return serviceTypes;
}
public void setServiceTypes(Set<ServiceType> serviceTypes) {
this.serviceTypes = serviceTypes;
}
#JoinColumn(name = "CONTRACT_TYPE")
#ManyToOne
public Parameter getContractType() {
return contractType;
}
public void setContractType(Parameter contractType){
this.contractType = contractType;
}
#Convert(converter = ExpertTypeConverter.class)
#Column(name = "EXPERT_TYPE")
public ExpertType getExpertType() {
return expertType;
}
public void setExpertType(ExpertType expertType) {
this.expertType = expertType;
}
public void fromDto(HelperInput input) {
this.id = input.getId();
this.address = input.getAddress();
this.allowedToOperate = input.getAllowedToOperate();
this.currentWorkCount = input.getCurrentWorkCount();
this.hasGps = input.getHasGps();
this.hasFlatTirePack = input.getHasFlatTirePack();
this.isAutoDialer = input.getIsAutoDialer();
this.personelId = input.getPersonelId();
this.isPartSupply = input.getIsPartSupply();
this.maxConcurrentWork = input.getMaxConcurrentWork();
this.hasPos = input.getHasPos();
this.posSerial = input.getPosSerial();
this.skillLevel = input.getSkillLevel();
this.reservedMobile = input.getReservedMobile();
if (input.getId() == null) { //first time
this.largeId = StringSequenceIdentifier.generateLargeId();
this.createdBy = input.getCreatedByEntity();
this.createdAt = LocalDateTime.now();
this.modifiedBy = input.getCreatedByEntity();
this.modifiedAt = createdAt;
} else {
this.modifiedBy = input.getModifiedByEntity();
this.modifiedAt = LocalDateTime.now();
}
this.helperRate = input.getHelperRate();
}
}
#Entity
#Getter
#Setter
#NoArgsConstructor
#ToString
#AllArgsConstructor
#JsonDeserialize
#Table(name = "TBL_HELPER_DUTY_CITIES")
#IdClass(HelperDutyCityKey.class)
public class HelperDutyCity implements Serializable {
#Id
#ManyToOne(cascade = CascadeType.ALL)
#JoinColumn(name = "HELPER_ID")
private Helper helper;
#Id
#OneToOne
#JoinColumn(name = "ESTABLISHMENT_CITY_ID", referencedColumnName = "ID")
#Fetch(FetchMode.JOIN)
private City establishmentCityId;
#ManyToOne
#JoinColumn(name = "DUTY_CITY_ID", referencedColumnName = "ID")
#Fetch(FetchMode.JOIN)
private City dutyCityId;
public HelperDutyCity(Helper helper, City establishmentCityId) {
this.helper = helper;
this.establishmentCityId = establishmentCityId;
}
}
#Data
#ToString(exclude = {"regions","regionalOffice", "province","productCities"})
#EqualsAndHashCode(exclude = {"regions","regionalOffice", "province","productCities"})
#JsonInclude(JsonInclude.Include.NON_NULL)
#Entity
#Table(name = "TBL_CITY", schema = "OPR")
public class City implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
#GenericGenerator(
name = "seqCity",
strategy = "org.hibernate.id.enhanced.SequenceStyleGenerator",
parameters = {
#org.hibernate.annotations.Parameter(name = "sequence_name", value = "SEQ_CITY"),
#org.hibernate.annotations.Parameter(name = "initial_value", value = "100219"),
#org.hibernate.annotations.Parameter(name = "increment_size", value = "1")
}
)
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "seqCity")
#Id
#Column(name = "ID")
private Long id;
#Column(name = "NAME")
private String name;
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "PROVINCE_ID", nullable = false)
private Province province;
#GenericGenerator(
name = "assigned-sequence",
strategy = "com.eki.opr.utils.StringSequenceIdentifier"
)
#GeneratedValue(
generator = "assigned-sequence",
strategy = GenerationType.SEQUENCE)
#Column(name = "LARGE_ID")
private String largeId;
#Column(name = "OPR_SHAHR_ID")
private Double oprCityId;
#Column(name = "LATITUDE")
private Double latitude;
#Column(name = "LONGITUDE")
private Double longitude;
#Column(name = "METROPOLIS_FACTOR")
private Double metropolisFactor;
#Convert(converter = YesNoConverter.class)
#Column(name = "IS_AUTOMATED_DISPATCH")
private YesNo isAutomatedDispatch;
#Convert(converter = GeneralStatusConverter.class)
#Column(name = "STATUS")
private GeneralStatus status;
#Column(name = "PARSIMAP_CITY_CODE")
private String parsiMapCityCode;
#Column(name = "AMAR_CITY_CODE")
private String parsiMapCityAmarCode;
#JoinColumn(name = "REGIONAL_OFFICE_ID")
#ManyToOne(fetch = FetchType.LAZY)
private RegionalOffice regionalOffice;
#ManyToMany(
fetch = FetchType.LAZY, mappedBy = "cities")
Set<Region> regions = new HashSet<>();
/* #OneToMany(mappedBy = "city")
private Set<Address> addresses;*/
public City() {
}
public City(Long id) {
this.id = id;
// this.addresses = addresses;
}
public City(CityDto dto) {
fromDto(dto);
}
public void fromDto(CityDto cityDto) {
this.name = cityDto.getName();
this.metropolisFactor = cityDto.getMetropolisFactor();
}
public CityDto toDto() {
CityDto dto = new CityDto();
dto.setId(id);
dto.setName(name);
dto.setMetropolisFactor(metropolisFactor);
dto.setProvinceDto(province.toDto());
dto.setRegionalOfficeOutput(regionalOffice.toDto());
return dto;
}
public CityLite toDtoLite() {
CityLite dto = new CityLite();
dto.setId(id);
dto.setName(name);
dto.setMetropolisFactor(metropolisFactor);
dto.setProvinceId(province != null ? province.getId() : null);
dto.setProvinceName(province != null ? province.getName() : "");
dto.setRegionalOfficeId(regionalOffice != null ? regionalOffice.getId() : null);
dto.setRegionalOfficeTitle(regionalOffice != null ? regionalOffice.getTitle() : "");
dto.setParsiMapCityCode(parsiMapCityCode);
dto.setParsiMapAmarCityCode(parsiMapCityAmarCode);
dto.setLat(latitude != null ? latitude :0);
dto.setLng(longitude != null ? longitude :0);
return dto;
}
}
I answered it in a comment in Helper entity. the answer is you shouldn't make a mistake in mappedBy attribute in #OneToMany annotation. so I changed dutyCityId to helper now it's working.
before it was joining with another condition helper.ID = helperDutyCity.dutyCityId which was wrong now it joins with this condition helper.ID = helperDutyCity.helperId which is correct.
I have a small problem with hibernate query with one-to-one relation
I created 3 entities. In case of one-to-one relation user-to-group it works properly. I use property create in hiberanate config and it creates correct table with correct FK.
Creating record work correct too
MyUser user = new MyUser();
user.setLogin("Mark");
user.setPassword("123456");
MyPresence presence = new MyPresence();
presence.setPresenceId(2);
presence.setUser(user);
session.beginTransaction();
session.save(user);
session.save(presence);
session.getTransaction().commit();
session.close();
if get User by presence it works correct
int id = 2;
MyPresence myPresence = session.load(MyPresence.class, id);
System.out.println(myPresence);
But when I'm try to get presence by user result from database hibernate build wrong sql query
int id = 3;
MyUser myUser = session.load(MyUser.class, id);
System.out.println(myUser);
Generated Hibernate sql:
Hibernate: select myuser0_.id as id1_2_0_, myuser0_.group_id as group_id4_2_0_, myuser0_.login as login2_2_0_, myuser0_.password as password3_2_0_, mypresence1_.id as id1_1_1_, mypresence1_.presence_id as presence2_1_1_, mypresence1_.updated_at as updated_3_1_1_, mypresence1_.user_id as user_id4_1_1_ from users myuser0_ left outer join user_presence mypresence1_ on myuser0_.id=mypresence1_.id where myuser0_.id=?
But I expect to see
on myuser0_.id=mypresence1_.user_id instead of on myuser0_.id=mypresence1_.id
MyUser.java
#Entity
#Table(name = "users")
public class MyUser {
private int id;
private String login;
private String password;
private MyGroup group;
private MyPresence presence;
public MyUser() {
}
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
#Column(name = "login")
public String getLogin() {
return login;
}
public void setLogin(String login) {
this.login = login;
}
#Column(name = "password")
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
#JoinColumn(name = "group_id")
#OneToOne(cascade = CascadeType.DETACH, fetch = FetchType.LAZY)
public MyGroup getGroup() {
return group;
}
public void setGroup(MyGroup group) {
this.group = group;
}
#OneToOne(cascade = CascadeType.DETACH)
#JoinColumn(name = "id", referencedColumnName = "user_id")
public MyPresence getPresence() {
return presence;
}
public void setPresence(MyPresence presence) {
this.presence = presence;
}
}
MyPresence.java
#Entity
#Table(name = "presence")
public class MyPresence {
private int id;
private MyUser user;
private int presenceId;
private Date updatedAt;
public MyPresence() {
}
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
#OneToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "user_id", referencedColumnName = "id")
public MyUser getUser() {
return user;
}
public void setUser(MyUser user) {
this.user = user;
}
#Column(name = "presence_id")
public int getPresenceId() {
return presenceId;
}
public void setPresenceId(int presenceId) {
this.presenceId = presenceId;
}
#Column(name = "updated_at")
public Date getUpdatedAt() {
return updatedAt;
}
public void setUpdatedAt(Date updatedAt) {
this.updatedAt = updatedAt;
}
I'm new to hibernate 4 and I'm having some problem while saving a object using save(Object) method. My mapping files generated using reverse engineering are give below.
Event.java
#Entity
#Table(name = "event")
public class Event implements java.io.Serializable {
private Integer eventId;
private Set<EventCategory> eventCategories = new HashSet<EventCategory>(0);
public Event() {
}
#Id
#GeneratedValue(strategy = IDENTITY)
#Column(name = "EVENT_ID", unique = true, nullable = false)
public Integer getEventId() {
return this.eventId;
}
public void setEventId(Integer eventId) {
this.eventId = eventId;
}
#OneToMany(fetch = FetchType.LAZY, mappedBy = "event")
public Set<EventCategory> getEventCategories() {
return this.eventCategories;
}
public void setEventCategories(Set<EventCategory> eventCategories) {
this.eventCategories = eventCategories;
}
}
category.java
#Entity
#Table(name = "category")
public class Category implements java.io.Serializable {
private Integer categoryId;
private Set<EventCategory> eventCategories = new HashSet<EventCategory>(0);
#Id
#GeneratedValue(strategy = IDENTITY)
#Column(name = "CATEGORY_ID", unique = true, nullable = false)
public Integer getCategoryId() {
return this.categoryId;
}
public void setCategoryId(Integer categoryId) {
this.categoryId = categoryId;
}
#OneToMany(fetch = FetchType.LAZY, mappedBy = "category")
public Set<EventCategory> getEventCategories() {
return this.eventCategories;
}
public void setEventCategories(Set<EventCategory> eventCategories) {
this.eventCategories = eventCategories;
}
}
EventCategory.java
#Entity
#Table(name = "event_category")
public class EventCategory implements java.io.Serializable {
private EventCategoryId id;
private Event event;
private Category category;
public EventCategory() {
}
public EventCategory(EventCategoryId id) {
this.id = id;
}
public EventCategory(EventCategoryId id, Event event, Category category) {
this.id = id;
this.event = event;
this.category = category;
}
#EmbeddedId
#AttributeOverrides({
#AttributeOverride(name = "eventId", column = #Column(name = "EVENT_ID")),
#AttributeOverride(name = "categoryId", column = #Column(name = "CATEGORY_ID")) })
public EventCategoryId getId() {
return this.id;
}
public void setId(EventCategoryId id) {
this.id = id;
}
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "EVENT_ID", insertable = false, updatable = false)
public Event getEvent() {
return this.event;
}
public void setEvent(Event event) {
this.event = event;
}
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "CATEGORY_ID", insertable = false, updatable = false)
public Category getCategory() {
return this.category;
}
public void setCategory(Category category) {
this.category = category;
}
}
All these files are generated using hbm2java (reverse engineering). But i couldn't able to save values using the below code. And also I'm not getting any exception while running this piece of code.
EventCategory eventCategory = new EventCategory();
eventCategory.setEvent(event);
eventCategory.setCategory(category);
eventCategory.setId(eventCategoryId);
getSession().save( eventCategory );
Please help me to resolve my problem
You need a transaction.
EventCategory eventCategory = new EventCategory();
eventCategory.setEvent(event);
eventCategory.setCategory(category);
eventCategory.setId(eventCategoryId);
Session session = getSession();
Transaction transaction = session.beginTransaction();
session.save( eventCategory );
transaction.commit();
I have two beans user and virtualdomain
#Entity
#Table(name = "tblUser")
public class User implements Serializable {
private Long id;
private String username;
private String deleteflag;
private Set<VirtualDomain> virtualdomainset;
#Id
#Column(name = "id")
#GeneratedValue(strategy = GenerationType.AUTO)
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
#Column(name = "username", length = 50, nullable = false)
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
#Column(name = "deleteflag")
public String getDeleteflag() {
return deleteflag;
}
public void setDeleteflag(String deleteflag) {
this.deleteflag = deleteflag;
}
#ManyToMany(targetEntity = VirtualDomain.class, cascade = {CascadeType.PERSIST},fetch=FetchType.EAGER)
#JoinTable(name = "tblUserDomainRel", joinColumns = #JoinColumn(name = "userid"), inverseJoinColumns = #JoinColumn(name = "domainid"))
public Set<VirtualDomain> getVirtualdomainset() {
return virtualdomainset;
}
public void setVirtualdomainset(Set<VirtualDomain> virtualdomainset) {
this.virtualdomainset = virtualdomainset;
}
}
#Entity
#Table(name = "tblVirtualDomain")
public class VirtualDomain {
private Long id;
private String domainname;
private String deleteflag;
private Set<User> userset;
#Id
#JoinColumn(name = "id")
#GeneratedValue(strategy = GenerationType.AUTO)
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
#Column(name = "domain_name")
public String getDomainname() {
return domainname;
}
public void setDomainname(String domainname) {
this.domainname = domainname;
}
#Column(name = "deleteflag")
public String getDeleteflag() {
return deleteflag;
}
public void setDeleteflag(String deleteflag) {
this.deleteflag = deleteflag;
}
#ManyToMany(cascade = {CascadeType.ALL},fetch=FetchType.EAGER, mappedBy = "virtualdomainset", targetEntity = User.class)
public Set<User> getUserset() {
return userset;
}
public void setUserset(Set<User> userset) {
this.userset = userset;
}
}
Now when I delete some user i use to set the deleteflag which means that the data remains in the database.
My requirement is that the user whose delete flag is set must be removed from the tblUserDomainRel table so how to write that delete query.
just remove the virtualDomain from the collection on the User and remove the other side for completeness
// on User
public void removeVirtualDomain(VirtualDomain vd){
virtualDomainset.remove(vd);
vd.getUserset().remove(this)
}
this will remove the relationship record. Or to remove a user from all virtual Domains:
// on User
public void removeFromAllVirtualDomains(){
for( VirtualDomain vd : virtualdomainset ){
vd.getUserset().remove(this);
}
virtualDomainset.clear();
}