Hibernate Criteria - org.hibernate.QueryException: could not resolve property:

Question

I'm trying to use criteria for select the values from many-to-one releationship mapped field.But i'm getting errororg.hibernate.QueryException: could not resolve property:part_id of:. Please see my pojo classes and advise what is the wrong here.

Criteria partCriteria = session.createCriteria(PartFeatureVersion.class);
partCriteria.add(Restrictions.eq("part_id",part.getPart_id()));


@Entity
@Table(name="DBO.PART_FEATURE_VERSION")
public class PartFeatureVersion {
private Part part;

@ManyToOne(fetch=FetchType.LAZY)
    @JoinColumn(name="part_id")
    public Part getPart() {
        return part;
    }


@Entity
@Table(name="DBO.PART")
public class Part {

private String part_id;
    private Set<PartFeatureVersion> partfeatureversion = new HashSet<PartFeatureVersion>(0);

    @Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name="PART_ID")
public String getPart_id() {
    return part_id;
}

    @OneToMany(cascade=CascadeType.ALL,fetch=FetchType.LAZY,mappedBy="part")
public Set<PartFeatureVersion> getPartfeatureversion() {
    return partfeatureversion;
}

if create getters/setters in PartFeatureVersion pojo class , its giving error as org.hibernate.MappingException: Repeated column in mapping for entity:PART_ID (should be mapped with insert="false" update="false").

Answer 1

Change the following code:

partCriteria.add(Restrictions.eq("part_id",part.getPart_id()));

into:

partCriteria.add(Restrictions.eq("part", part));

The criteria in your code is based on PartFeatureVersion class. You are restricting the criteria based on PartFeatureVersion.part_id property. The problem is your PartFeatureVersion class doesn't have a property called part_id.

Answer 2

This happened to me.

I fixed it by matching the sintax's upper and lower case description field when used in the criteria, and match the fielname declared in the DTO class.