org.springframework.beans.NoReadAdAllyPropertyException: Propriété non valide de la propriété de haricot de classe de haricots n'est pas lisible ni a une méthode getter invalide

printemps mvc est nouveau pour moi. J'aimerais avoir une littérature complète avec l'exemple de Spring MVC (même les documents officiels ne sont pas simples à comprendre).

Donc, le problème que je suis confronté est le suivant: p>

@Entity
@Table(name="CREATION_DATE")
@NamedQueries ({
@NamedQuery(name="creationDate.findById", query="select distinct c from CreationDate c left join fetch c.institution n " +
                                                  "left join fetch c.scheduleRotationChild s where c.dateId= :i")
})
public class CreationDate implements Serializable {


    private static final long serialVersionUID = 1648102358397071136L;


    private int dateId;

        @Id
        @GeneratedValue(strategy=IDENTITY)
        @Column(name="DATE_ID")
        public int getDateId() {
            return dateId;
        }

        public void setDateId(int dateId) {
            this.dateId = dateId;
        }


    private Date particularDate;

        @Column(name="PARTICULAR_DATE")
        public Date getParticularDate() {
            return particularDate;
        }

        public void setParticularDate(Date particularDate) {
            this.particularDate = particularDate;
        }


    private int version;

        @Version
        @Column(name="VERSION")
        public int getVersion() {
            return version;
        }

        public void setVersion(int version) {
            this.version = version;
        }


    private Date childGoSchoolDate;

        @Temporal(TemporalType.DATE)
        @Column(name="CHILD_GO_SCHOOL_DATE")
        public Date getChildGoSchoolDate() {
            return childGoSchoolDate;
        }

        public void setChildGoSchoolDate(Date childGoSchoolDate) {
            this.childGoSchoolDate = childGoSchoolDate;
        }


    private Date childAdmissionDate;

        @Temporal(TemporalType.DATE)
        @Column(name="CHILD_ADMISSION_DATE")
        public Date getChildAdmissionDate() {
            return childAdmissionDate;
        }

        public void setChildAdmissionDate(Date childAdmissionDate) {
            this.childAdmissionDate = childAdmissionDate;
        }


    private Set<Institution> institution = new HashSet<Institution>();

        @ManyToMany(fetch = FetchType.LAZY)
        @Cascade(org.hibernate.annotations.CascadeType.ALL)
        @JoinTable(name="CREATIONDATE_INSTITUTION", 
                                    joinColumns=@JoinColumn(name="DATE_ID"), 
                                    inverseJoinColumns=@JoinColumn(name="INSTITUTION_ID"))
        public Set<Institution> getInstitution() {
            return institution;
        }

        public void setInstitution(Set<Institution> institutionSet) {
            this.institution = institutionSet;
        }


    private List<ScheduleRotationChild> scheduleRotationChild = new ArrayList<ScheduleRotationChild>();

        @OneToMany(fetch=FetchType.EAGER, orphanRemoval=true)
        @Cascade(org.hibernate.annotations.CascadeType.ALL)
        @JoinTable(name="SRC_DATE", 
                                    joinColumns=@JoinColumn(name="DATE_ID"),
                                    inverseJoinColumns=@JoinColumn(name="SRC_ID"))
        public List<ScheduleRotationChild> getScheduleRotationChild() {
            return scheduleRotationChild;
        }

        public void setScheduleRotationChild(
                List<ScheduleRotationChild> scheduleRotationChild) {
            this.scheduleRotationChild = scheduleRotationChild;
        }





        public void addSetInstitutions(Set<Institution> institution) {

            setInstitution(institution);

        }


        public void addSRC(List<ScheduleRotationChild> srcinstitution) {

        setScheduleRotationChild(srcinstitution);

        }



        public String toString() {

            return "\n" + "ID: " + dateId + " \n " 
            + "Дата: " +particularDate + " \n " 
            + "Дети идут в школу, год: " + childGoSchoolDate + " \n " 
            + "Дата приема детей: " + childAdmissionDate + "  " + scheduleRotationChild + " \n " ;

        }


}