I have a bidirectional relationship.
This is my entity factura:
#Entity
#Table(name = "T_FACTURA")
#Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
public class Factura implements Serializable {
...
#OneToMany(mappedBy = "factura")
#JsonIgnore
#Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
private Set<Facturaservicio> facturaservicios = new HashSet<>();
...
#Override
public String toString() {
//all attributes except facturaservicios
}
}
This is my entity facturaservicio:
#Entity
#Table(name = "T_FACTURASERVICIO")
#Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
public class Facturaservicio implements Serializable {
...
#ManyToOne
private Factura factura;
...
#Override
public String toString() {
//all attributes except factura
}
}
This is my REST controller
#RestController
#RequestMapping("/app")
public class FacturaResource {
private final Logger log = LoggerFactory.getLogger(FacturaResource.class);
#Inject
private FacturaRepository facturaRepository;
#RequestMapping(value = "/rest/facturas",
method = RequestMethod.GET,
produces = MediaType.APPLICATION_JSON_VALUE)
#Timed
public List<Factura> getAll() {
log.debug("REST request to get all Facturas");
return facturaRepository.findAll();
}
And this is my AngularJS controller:
$http.get('app/rest/facturas').
success(function (data, status, headers, config) {
console.log(JSON.stringify(data));
});
Why my collection is null in the AngularJS controller? How can I access to collection?
When JHipster creates a entity with OneToMany - ManyToOne relationship makes that the first entity (factura) has a list of the second entity (facturaservicios) but it not say the type of relation.
So the solution is add fetch = FetchType.EAGER in the #OneToManyRelation.
#OneToMany(mappedBy = "factura", fetch = FetchType.EAGER)
#JsonIgnore
#Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
private Set<Facturaservicio> facturaservicios = new HashSet<>();
#ManyToOne
private Factura factura;
In the Factura entity, you need to remove the #JsonIgnore property in the following snippet:
#OneToMany(mappedBy = "factura")
#JsonIgnore
#Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
private Set<Facturaservicio> facturaservicios = new HashSet<>();
Related
I have 3 entity classes with relations as below:
class SocietyData {
#OneToMany(mappedBy = "societyData")
private List<SubsectionData> subsectionDataList = new ArrayList<>();
}
class SubsectionData {
#ManyToOne(cascade = CascadeType.ALL)
#JoinColumn(name = "society_id", nullable = false)
private SocietyData societyData;
#OneToMany(mappedBy = "subsectionData")
private List<BasementData> basementDataList = new ArrayList<>();
}
class BasementData {
#ManyToOne(cascade = CascadeType.ALL)
#JoinColumn(name = "subsection_id", nullable = false)
private SubsectionData subsectionData;
}
I am trying to fetch society data information by using entity graph:
#Repository
public interface SocietyRepo extends JpaRepository<SocietyData, Long> {
#EntityGraph(attributePaths = {"subsectionDataList", "subsectionDataList.basementDataList"})
Optional<SocietyData> findById(long id);
}
I am not getting proper society data object and getting cant parse json exception after taking so long time sometimes!
How to solve this?
Thanks in Advance.
I'm using hibernate with manyToMany relation and I want to display data from database
Thank you in advance.
I get this errors:
database :
Here is the code :
Class EnseignerId :
#Embeddable
public class EnseignerId implements Serializable {
//id professeur
#Column(name="professeur_code")
private int code;
//id matiere
#Column(name="matiere_reference")
private String reference;
public EnseignerId() {
super();
}
//getters and setters...
Class Enseigner :
#Entity
#Table(name="Enseigner")
public class Enseigner {
#EmbeddedId
private EnseignerId id = new EnseignerId();
//id prof
#ManyToOne
#MapsId("code")
private Professeur professeur;
//id matiere
#ManyToOne
#MapsId("reference")
private Matiere matiere;
#Column(name="heures")
private int heures;
//constructor getters and setters...
Class Professeur:
#Entity
#Table(name="professeur")
public class Professeur {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
#Column(name="code")
private int code ;
#Column(name="nom")
private String nom;
#Column(name="prenom")
private String prenom;
...
#OneToMany(
mappedBy="professeur",
cascade = CascadeType.ALL,
orphanRemoval = true)
private List<Enseigner> matieres; //List<Association> Class; //I followed a tutorial
//constructor getters and setters...
public List<Enseigner> getMatieres() {
return matieres;
}
Class Matiere :
#Entity
#Table(name="matiere")
public class Matiere {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
#Column(name="reference")
private String reference;
#Column(name="description")
String description;
#Column(name="volume")
int volume;
#OneToMany(
mappedBy= "matiere",
cascade = CascadeType.ALL,
orphanRemoval = true)
private List<Enseigner> professeurs;
//constructor getters and setters...
getProfesseur() method :
public Professeur getProfesseur(int code) {
SessionFactory sessionFactory = getSessionFactory(); //static method
Session session = sessionFactory.openSession();
Professeur professeur = null;
try {
session.getTransaction().begin();
System.out.println("------------Calling getProfesseur()----------");
professeur = session.get(Professeur.class, code);
if(professeur != null) {
System.out.println(professeur);
}else {
throw new DAOException( "CODE INVALIDE!" );
}
}
catch(Exception e ) {
System.out.println(e.getMessage());
}
finally {
session.close();
}
return professeur;
}
Saving data and getting professors who don't have an Matiere work. but getting Matiere or professeur whose primary key exists in the join table Enseigner generate errors when I do something like :
Professeur prof =profDAO.getProfesseur(2); //*generates errors* //the professor with id=2 exists in database
System.out.println(prof);
List<Enseigner> enseigner = prof.getMatieres(); //*generates errors*...
List<Matiere> matieres = new ArrayList<>();
for(Enseigner ens : enseigner) {
matieres.add(ens.getMatiere());
System.out.println(ens);
}
/*for(Matiere mat : matieres) {
System.out.println(mat);
}*/
This problem has nothing to do with Hibernate. Please inspect the stack trace carefully: your Enseigner.toString() calls Professeur.toString() which in turn calls Enseigner.toString() again and so on.
I notice this problem more and more these days when people blindly use Lombok with its #Data (which should almost never be used), #ToString and #EqualsAndHashCode. These generate respective methods that include all fields!
You need to remove these annotations or set them up so that they use only the fields that you really need. Most of the time your equals() and hashCode() are not needed when you write web apps with ORM. Hibernate ensures you don't have 2 instances of the same entity.
On the other hand toString() can be useful, but we shouldn't include all fields in it - just the ones that are helpful in identifying the entity.
You have cyclic reference. You need exclude field professeurs and matieres by #JsonIgnoreProperties
I have added Hibernate filters on my entities . These filters are applied on queries which fetch Collection of entity but not applied on queries which fetch single entity. Below is my code.
AOrganization.java
#MappedSuperclass
#FilterDef(name = "OrgFilter", parameters = { #ParamDef(name = "allowedOrgIdList", type = "long") })
#Filter(name = "OrgFilter", condition = "org_id in (:allowedOrgIdList)")
public class AOrganization implements Serializable {
#ManyToOne()
#JoinColumn(name = "org_id", nullable = true)
private Organization organization;
public Organization getOrganization() {
return organization;
}
public void setOrganization(Organization organization) {
this.organization = organization;
}
}
Site.java
#Data
#Entity
#Table(name = "site")
public class Site extends AOrganization{
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "id")
private long id;
#Column(name = "site_name")
private String siteName;
#Override
public String toString() {
return "Site [id=" + id + ", siteName=" + siteName + "]";
}
}
SiteService.java
public interface SiteService {
public List<Site> getAllSites();
public List<Site> getSiteBySiteName(String siteName);
public Site updateSiteName(Long id, String siteName);
}
SiteRepository.java
#Repository
public interface SiteRepository extends AOrganizationRepository<Site, Long> {
public List<Site> findBySiteName(String siteName);
public List<Site> findByOrganization_Id(Long orgId);
}
AOrganizationRepository.java
#NoRepositoryBean
public interface AOrganizationRepository<T, ID extends java.io.Serializable> extends CrudRepository<T, ID> {
}
SiteServiceImpl.java
#Service
public class SiteServiceImpl implements SiteService {
#Autowired
private EntityManager entityManager;
#Autowired
private SiteRepository siteRepository;
#Override
public List<Site> getAllSites() {
Iterable<Site> sites = siteRepository.findAll();
List<Site> allSites = new ArrayList<>();
sites.forEach(allSites::add);
return allSites;
}
#Override
public List<Site> getSiteBySiteName(String siteName) {
List<Site> allSites = siteRepository.findBySiteName(siteName);
return allSites;
}
#Override
public Site updateSiteName(Long id,String siteName) {
Site site = siteRepository.findById(id).get();
if(site == null)
return null;
site.setSiteName(siteName);
siteRepository.save(site);
return site;
}
}
AOrganizationAspect.java
#Aspect
#Component
#Slf4j
public class AOrganizationAspect {
#PersistenceContext
private EntityManager entityManager;
#Pointcut("execution(public * com.harshal.springboot.springfilter.repository.AOrganizationRepository+.*(..))")
protected void aOrganizationRepositoryRepositoryMethod() {
log.info("aOrganizationRepositoryRepositoryMethod");
}
#Around(value = "aOrganizationRepositoryRepositoryMethod()")
public Object enableOwnerFilter(ProceedingJoinPoint joinPoint) throws Throwable {
// Variable holding the session
Session session = null;
try {
// Get the Session from the entityManager in current persistence context
session = entityManager.unwrap(Session.class);
// Enable the filter
Filter filter = session.enableFilter("OrgFilter");
// Set the parameter from the session
List<Long> orgList = getAllowedOrgIdList();
filter.setParameterList("allowedOrgIdList", orgList);
} catch (Exception ex) {
// Log the error
log.error("Error enabling OrgFilter : Reason -" + ex.getMessage());
}
// Proceed with the joint point
Object obj = joinPoint.proceed();
// If session was available
if (session != null) {
// Disable the filter
session.disableFilter("OrgFilter");
}
// Return
return obj;
}
private List<Long> getAllowedOrgIdList() {
return Arrays.asList(2l);
}
}
So , hibernate filters are applied if method getSiteBySiteName is called and filters are not applied if findById method is called.
Below are queries :
For getSiteBySiteName :
select site0_.id as id1_2_, site0_.org_id as org_id3_2_,
site0_.site_name as site_nam2_2_ from site site0_ where site0_.org_id
in (?) and site0_.site_name=?
Please help . Thanks in advance.
For findById
select site0_.id as id1_2_0_, site0_.org_id as org_id3_2_0_,
site0_.site_name as site_nam2_2_0_, organizati1_.id as id1_1_1_,
organizati1_.address as address2_1_1_, organizati1_.org_name as
org_name3_1_1_ from site site0_ left outer join organization
organizati1_ on site0_.org_id=organizati1_.id where site0_.id=?
findById is using the EntityManager.find method and do not create a query.
Plus Hibernate Filters only work on queries.
You should write a query instead of using findById
I have a problem with saving entity with references to database using
Spring MVC and AngularJS.
My entities:
Entity
#Table(name = "comment")
public class Comment {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
#Column(name = "id", nullable = false)
private Long id;
#Column(name = "creation_date", nullable = false)
private Date creationDate;
#Column(name = "comment", nullable = false)
private String comment;
#ManyToOne
#JoinColumn(name = "article", nullable = false)
private Article article;
#ManyToOne
#JoinColumn(name = "user", nullable = false)
private User user;
}
#Entity
#Table(name = "article")
public class Article {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "id", nullable = false)
private Long id;
#ManyToOne
#JoinColumn(name="user", nullable=false)
private User user;
...
}
How can I save new Article but at the same time add new entity to Comment table?
How can two updates be performed in one transaction?
How sholud I connect request from angular with controller, and how sholud they look?
Angular:
$http({
url : ..../new,
method : POST,
data : ?
})
#RestController
#RequestMapping(value = "/new", method = RequestMethod.POST)
public Article addArticle(#RequestBody Article article, ?) {
article.setId(null);
return articleService.save(article);
//but how to save comment?
}
Thank You!
I have a Priv class
#Entity
#Table(name = "PK_PRIVS", schema = "dbo")
public class Priv implements java.io.Serializable{
private static final long serialVersionUID = 1L;
private String code;
private String name;
private String description;
private PrivType type;
//...
}
and a Report class which has many to many relation with Priv and contains Set of associated Privs - privs.
#Entity
#Table(name = "REPORT", schema = "dbo")
public class Report implements java.io.Serializable {
//...
private Set<Priv> privs = new HashSet<Priv>(0);
//...
#JsonIgnore
#ManyToMany(fetch = FetchType.LAZY)
#JoinTable(name = "REPORT_PK_PRIVS", schema = "dbo", joinColumns = { #JoinColumn(name = "REPORT_ID") }, inverseJoinColumns = { #JoinColumn(name = "PK_PRIVS_CODE") })
public Set<Priv> getPrivs() {
return this.privs;
}
public void setPrivs(Set<Priv> privs) {
this.privs = privs;
}
}
Now I have a Set of Strings, which are codes of Priv classes (code is Primary Key in Priv).
Set<String> privsCodesSet; //set of codes of Priv classes
I need a criterion which allow me to find that Reports, which all codes from its Priv set contains in privsCodesSet. For example if I have privsCodeSet = {"code1", "code2"}
Report with privs with codes {"code1"" should be in result, but
Report with privs with codes {"code1", "code2", "code3"} should not.
I also have class which is join of Priv and Report, but I'm not sure if it's help.
This code should work
Criteria reportPrivCriteria = currentSession()
.createCriteria( Report.class, "r");
reportPrivCriteria.createAlias("privs", "p");
reportPrivCriteria.add(Restrictions.in(p.code, privsCodeSet));
Do you have something like this on your Priv class?
private Set<Report> reports;
// ...
#ManyToMany(mappedBy="privs")
public Collection<Report> getReports() {
return reports;
}