one-to-many

I have this problem for a long time now, I have searched the web and SO in and out and didn't find a solution yet. I hope you can help me on that. I have a parent-child relationship between two entities like the following: @Entity public class Parent { // ... @OneToMany(mappedBy = "parent", fetch = FetchType.LAZY, cascade = CascadeType.REMOVE) private Set<Child> children = new HashSet<Child>(); // ... } @Entity public class Child { // ... @ManyToOne(fetch = FetchType.LAZY) private Parent parent; // ... } The thing is that when I create a new child and assign it to a parent, the parent doesn't

This is a similar problem to "Hibernate @OneToMany without a separate join table" , in that I need a @OneToMany relationship without a join table. However, I would also like to not define the inverse relationship. Removing the inverse seems to result in a join table being automatically generated... is there a workaround for this? Arthur Ronald In JPA 2.0+ you can use @JoinColumn as a way to avoid to generate joined table. Try it. @OneToMany @JoinColumn(name="COLUMN_NAME") UPDATE The info provided above has been extracted from EJB 3.0 o'reilly book (Look for The @JoinColumn annotation

i have a Question about referencing ParentEntities from Child Entites ir If i have something like this: Parent.java: @Entity(name ="Parent") public class Parent { @Id @Generate..... @Column private int id; @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "parent") private Set<Child> children; simple ... getter and setter ... } And the Child.java: @Entity(name ="Child") public class Child{ @Id @Generate.... @Column private int id; @ManyToOne private Parent parent; ... simple getter an setter } Following Tables are going to be created: Parent: int id Child: int id int