"Repeated column in mapping for collection"具有相同外键的休眠 ManyToMany？

Question

我有以下4个表:

create table market (
    id int(6) unsigned auto_increment primary key,
    market_id varchar(30) unique
);
create table market_channel_group (
    id int(6) unsigned auto_increment primary key,
    market_id varchar(30),
    channel_group_id varchar(30),
    unique index (market_id,channel_group_id)
);
create table market_channel (
    id int(6) unsigned auto_increment primary key,
    market_id varchar(30),
    channel_id varchar(30),
    unique index (market_id,channel_group_id)
);
create table market_channel_group_detail (
    id int(6) unsigned auto_increment primary key,
    market_id varchar(30),
    channel_group_id varchar(30),
    channel_id varchar(30),
    unique index (market_id,channel_group_id, channel_id)
);

可以看到，市场是一个多到market_channel_group, market_channel。market_channel_group是manymany到特定市场下的market_channel

问题是在我的market_channel_group实体，我有以下代码:

@Entity(name = "market_channel_group")
@Table(name = "market_channel_group", uniqueConstraints = {@UniqueConstraint(columnNames = {"market_id", "channel_group_id"})})
public class MarketChannelGroup extends BaseEntity {
    private static final long serialVersionUID = 1L;
    public MarketChannelGroup() {
        super();
    }
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name = "id")
    private int id;
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "market_id", referencedColumnName = "market_id")
    private Market market;
    @Column(name = "channel_group_id", length = 50)
    private String channelGroupId;
    @ManyToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
    @JoinTable(name = "market_channel_group_detail",
            joinColumns = {@JoinColumn(name = "market_id", referencedColumnName = "market_id"), @JoinColumn(name = "channel_group_id", referencedColumnName = "channel_group_id")},
            inverseJoinColumns = {@JoinColumn(name = "market_id", referencedColumnName = "market_id"), @JoinColumn(name = "channel_id", referencedColumnName = "channel_id")})
    private List<MarketChannel> channels;
...
}

然而，我得到了这个异常:

Caused by: org.hibernate.MappingException: Repeated column in mapping for collection: MarketChannelGroup.channels column: market_id
    at org.hibernate.mapping.Collection.checkColumnDuplication(Collection.java:343) ~[hibernate-core-4.3.6.Final.jar:4.3.6.Final]
...

我应该如何正确地编写manymany注释?还是我的设计有什么问题?

由于我们将从外部资源导入数据，因此自动增量id不用作其他表的引用，每个表除了自己的id之外还有另一个索引。

Answer 1

对于我来说，这是通过将insertable = false, updatable = false添加到@JoinColumn来解决的。