JPA级联持久性不起作用
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我有两个班级：支出和类别。支出可以有多个类别。我希望用支出（父母）实现所有类别（儿童）的级联保存。但是无法实现这一点。在持久性支出记录上，不会创建类别条目。请让我知道我在做什么错。这是我的课程：
@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;
}
没有找到相关结果
已邀请:
1 个回复
怪酞撩匹
并且不要在实体类中混淆字段和属性访问类型。