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1. mappedBy reference an unknown target entity property    stackoverflow.com

I am having an issue in setting up a one to many relationship in my annotated object. I have the following: 

@MappedSuperclass
public abstract class MappedModel
{
    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
 ...

2. mappedBy reference an unknown target entity property    forum.hibernate.org

i have 3 classes : @Entity @Table(name="companies") public class Company implements Serializable { private static final long serialVersionUID = -3322113303362981686L; @Id @Column(name="CMP_COMPANY_ID",nullable=false) @GeneratedValue(strategy = GenerationType.AUTO) private Integer id; @Column(name="CMP_COMPANY_NAME",nullable=false) private String name; @OneToMany(mappedBy="company") private Set items; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void ...

3. mappedBy reference an unknown target entity property    forum.hibernate.org

Item.class Code: @Entity public class Item implements Serializable { private static final long serialVersionUID = 8635086262992868784L; @EmbeddedId public ItemPK itemPK; @Column(name = "ITM_ITEM_NAME") private String itemName; } ItemPK.class Code: @Embeddable public class ItemPK implements Serializable ...