logandtr [https://community.jboss.org/people/logandtr] created the discussion
"Re: Cycle in relation one-to-many" To view the discussion, visit: https://community.jboss.org/message/831819#831819 -------------------------------------------------------------- Hi, the code is this: DB: Persons(id, name) Phonenumbers(number, id_persons) FK id_person references Persons(id) Java code: package com.app.model; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.FetchType; import javax.persistence.Id; import javax.persistence.JoinColumn; import javax.persistence.ManyToOne; import javax.persistence.Table; import org.jboss.resteasy.annotations.providers.jaxb.JAXBConfig; @Entity @Table(name = "phonenumbers", catalog = "test") public class Phonenumbers implements java.io.Serializable { private static final long serialVersionUID = -8122359598003938895L; private String number; private Persons persons; public Phonenumbers() { } public Phonenumbers(String number) { this.number = number; } public Phonenumbers(String number, Persons persons) { this.number = number; this.persons = persons; } @Id @Column(name = "number", unique = true, nullable = false, length = 20) public String getNumber() { return this.number; } public void setNumber(String number) { this.number = number; } @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name = "id_person") public Persons getPersons() { return this.persons; } public void setPersons(Persons persons) { this.persons = persons; } } package com.app.model; import java.util.HashSet; import java.util.Set; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.FetchType; import javax.persistence.GeneratedValue; import static javax.persistence.GenerationType.IDENTITY; import javax.persistence.Id; import javax.persistence.OneToMany; import javax.persistence.Table; @Entity @Table(name = "persons", catalog = "test") public class Persons implements java.io.Serializable { private static final long serialVersionUID = -3247756369663156186L; private Integer id; private String name; private Set<Phonenumbers> phonenumberses = new HashSet<Phonenumbers>(0); public Persons() { } public Persons(String name) { this.name = name; } public Persons(String name, Set<Phonenumbers> phonenumberses) { this.name = name; this.phonenumberses = phonenumberses; } @Id @GeneratedValue(strategy = IDENTITY) @Column(name = "id", unique = true, nullable = false) public Integer getId() { return this.id; } public void setId(Integer id) { this.id = id; } @Column(name = "name", nullable = false, length = 50) public String getName() { return this.name; } public void setName(String name) { this.name = name; } @OneToMany(fetch = FetchType.LAZY, mappedBy = "persons") public Set<Phonenumbers> getPhonenumberses() { return this.phonenumberses; } public void setPhonenumberses(Set<Phonenumbers> phonenumberses) { this.phonenumberses = phonenumberses; } } package com.app.dao; import javax.ejb.Stateless; import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; import javax.persistence.PersistenceContextType; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import com.app.model.Phonenumbers; @Stateless public class PhonenumbersHome { private static final Log log = LogFactory.getLog(PhonenumbersHome.class); @PersistenceContext(unitName="PhoneBook", type=PersistenceContextType.EXTENDED) private EntityManager entityManager; public void persist(Phonenumbers transientInstance) { log.debug("persisting Phonenumbers instance"); try { entityManager.persist(transientInstance); log.debug("persist successful"); } catch (RuntimeException re) { log.error("persist failed", re); throw re; } } public void remove(Phonenumbers persistentInstance) { log.debug("removing Phonenumbers instance"); try { entityManager.remove(persistentInstance); log.debug("remove successful"); } catch (RuntimeException re) { log.error("remove failed", re); throw re; } } public Phonenumbers merge(Phonenumbers detachedInstance) { log.debug("merging Phonenumbers instance"); try { Phonenumbers result = entityManager.merge(detachedInstance); log.debug("merge successful"); return result; } catch (RuntimeException re) { log.error("merge failed", re); throw re; } } public Phonenumbers findById(String id) { log.debug("getting Phonenumbers instance with id: " + id); try { Phonenumbers instance = entityManager.find(Phonenumbers.class, id); log.debug("get successful"); return instance; } catch (RuntimeException re) { log.error("get failed", re); throw re; } } } package com.app.dao; import javax.ejb.Stateless; import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; import javax.persistence.PersistenceContextType; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import com.app.model.Persons; @Stateless public class PersonsHome { private static final Log log = LogFactory.getLog(PersonsHome.class); @PersistenceContext(unitName="PhoneBook", type=PersistenceContextType.EXTENDED) private EntityManager entityManager; public void persist(Persons transientInstance) { log.debug("persisting Persons instance"); try { entityManager.persist(transientInstance); log.debug("persist successful"); } catch (RuntimeException re) { log.error("persist failed", re); throw re; } } public void remove(Persons persistentInstance) { log.debug("removing Persons instance"); try { entityManager.remove(persistentInstance); log.debug("remove successful"); } catch (RuntimeException re) { log.error("remove failed", re); throw re; } } public Persons merge(Persons detachedInstance) { log.debug("merging Persons instance"); try { Persons result = entityManager.merge(detachedInstance); log.debug("merge successful"); return result; } catch (RuntimeException re) { log.error("merge failed", re); throw re; } } public Persons findById(Integer id) { log.debug("getting Persons instance with id: " + id); try { Persons instance = entityManager.find(Persons.class, id); log.debug("get successful"); return instance; } catch (RuntimeException re) { log.error("get failed", re); throw re; } } } package com.app.ws; import javax.ejb.EJB; import javax.naming.Context; import javax.naming.InitialContext; import javax.ws.rs.PathParam; import javax.ws.rs.Produces; import javax.ws.rs.GET; import javax.ws.rs.Path; import com.app.dao.PersonsHome; import com.app.model.Persons; @Path("/persons") public class PersonsResources { @EJB private PersonsHome ph; @GET() @Produces("application/json") @Path("/{id}") public Persons getPerson(@PathParam("id") int id) { try{ Context cx = new InitialContext(); ph = (PersonsHome)cx.lookup("java:module/PersonsHome"); }catch(Exception e){ e.printStackTrace(); } return ph.findById(id); } }{/code} and this is the persistence.xml on link: http://localhost:8080/PhoneBook/persons/1 http://localhost:8080/PhoneBook/persons/1 I aspect ad output like this: > {"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932"...... but I've a cycle like this: > {"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons":{"id":1,"name":"Roberto","phonenumberses":[{"number":"+01932932","persons": Anyone can halp me? -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/831819#831819] Start a new discussion in EJB3 at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2029]
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