Question

我有两张桌子，一张是另一张桌子的父母。子表具有开始日期和结束日期列，用于确定其有效性。以下过滤器设置仅适用于加载有效的子项：

@Entity
@Table(name = "child")
@FilterDef(name = "dateFilter", parameters = @ParamDef( name = "targetDate", type = "string" ))
@Filter(name = "dateFilter", condition = "(:targetDate between to_char(startDate, 'yyyyMMdd') and to_char(endDate, 'yyyyMMdd')")
public class Child {}

我想要的是加载所有父项，只加载以父实体定义开头的有效子项。以下代码加载所有子代，而不仅仅是有效代码：

@Entity
@Table(name = "parent")
public class Parent {
    @OneToMany(mappedBy = "parent")
    private Collection<Child> childCollection = new HashSet<Child>();
}

如何为作用于子节点的父实体类指定过滤器？

Answer 1

@Entity
@Table(name = "parent")
@FilterDef(name = "dateFilter", parameters = @ParamDef( name = "targetDate", type = "string" ))
public class Parent {
    @OneToMany(mappedBy = "parent")
    @Filter(name = "dateFilter", condition = "(:targetDate between to_char(startDate, 'yyyyMMdd') and to_char(endDate, 'yyyyMMdd')")
    private Collection<Child> childCollection = new HashSet<Child>();
}

并确保启用过滤器...

Hibernate过滤子项

1 个答案: