JPA Cascade Persist not working
I have two classes : Expenditure and Category. An Expenditure can have multiple Categories. I wish to implement Cascade save o开发者_运维知识库f all Categories(children) with Expenditure(parent). But unable to achieve this.On persisting Expenditure record no Category entries are created. Please let me know what I am doing wrong. Here are my classes:
@Entity
@Table(name="EXPENDITURE")
public class Expenditure {
private Long id;
@OneToMany(cascade={CascadeType.PERSIST,CascadeType.MERGE}, mappedBy="expenditure")
private Set<Category> associatedCategories = new HashSet<Category>();
public Expenditure() { }
@Id @GeneratedValue(strategy=GenerationType.AUTO)
@Column(name="EXPENDITURE_ID")
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public void addCategory(Category category)
{
this.associatedCategories.add(category);
category.setExpenditure(this);
}
}
@Entity
@Table(name="CATEGORY")
public class Category {
@Id @GeneratedValue
@Column(name="CATEGORY_ID")
private Long id;
private String name;
@ManyToOne(targetEntity=Expenditure.class)
private Expenditure expenditure;
public Category(){}
public Category(String name)
{
this.name = name;
}
public Category(String name,String description)
{
this.name = name;
}
@Column(name="NAME")
public String getName() {
return name;
}
public Expenditure getExpenditure() {
return expenditure;
}
public void setExpenditure(Expenditure expenditure) {
this.expenditure = expenditure;
}
Try adding
@ManyToOne(targetEntity=Expenditure.class)
@JoinColumn(name="parentExpenditureId") // or whatever column name exists in your database schema
private Expenditure expenditure;
And also don't mix up the field and property access types in your entity classes.
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