java – 用Ebean映射String和枚举的集合(Play 2.0)

这是一个插图类：

package models;

import java.util.*;
import javax.persistence.*;
import play.db.ebean.Model;

@Entity
@Table(name = "foo")
public class Foo extends Model {

    private static final long serialVersionUID = 1L;

    private enum FooBar {
        FOO,BAR;
    }

    @Id
    public Long id;

    @ElementCollection
    @Enumerated(EnumType.STRING)
    @CollectionTable(name = "bar_foobar",joinColumns = @JoinColumn(name = "bar_id",referencedColumnName = "id"))
    @Column(name = "foobar")
    public List<FooBar> fooBars;

    @ElementCollection(targetClass = String.class)
    @CollectionTable(name = "bar_strings",joinColumns = @JoinColumn(name = "bar_id"))
    @Column(name = "string",nullable = false)    
    public List<String> listOfStrings;

    @Basic
    public List<String> listOfStrings2;

    // Attempt to circumvent the issue,but this gives a strange error
    //public String[] arrayOfString;
}

应用程序启动时生成的DDL如下所示：

create table foo (
id      bigint not null,constraint pk_foo primary key (id))
;

如果注释正确,我希望看到bar_foobar和bar_strings都被创建.

如果使用arrayOfString变量,我在应用程序启动时得到一个无效的错误消息(与随机实体相关,不一定是Foo.class

PersistenceException: Error with [models.user.User] It has not been
enhanced but it’s superClass [class play.db.ebean.Model] is? (You are
not allowed to mix enhancement in a single inheritance hierarchy)
marker[play.db.ebean.Model] className[models.user.User]

我知道我可以将我的字符串和枚举包装在实体中,并使用@ManyToMany关系,但是它的想法让我颤抖.在Play 2.0或Ebean中是否有错误(使用v2.7.3)？还有其他方法可以解决我的问题吗？