有没有办法使用@JoinTable注释，通过两个字段连接每个表？以下是示例表：
+----------------+ +----------------------------------+ +----------------+
| example_table | | example_table_to_some_type_table | | some_type_table|
+----------------+ +----------------------------------+ +----------------+
|example_table_id| |example_table_id | |some_type_id |
|another_id | |some_type_id | |another_id |
|... | |another_id | |... |
|other columns | +----------------------------------+ |other columns |
|... | |... |
+----------------+ +----------------+
对于多对一的情况，它看起来像这样：
@ManyToOne
@JoinColumns({ @JoinColumn(name = "some_type_id",
referencedColumnName = "some_type_id",
insertable = false, updatable = false),
@JoinColumn(name = "another_id",
referencedColumnName = "another_id",
insertable = false, updatable = false) })
private SomeType someType;
但是多对多关系呢？我尝试了以下方法，但没有奏效：
@ManyToMany(targetEntity = SomeType.class)
@JoinTable(name = "example_table_to_some_type_table",
joinColumns = { @JoinColumn(name = "example_table_id"),
@JoinColumn(name = "another_id") },
inverseJoinColumns = {
@JoinColumn(name = "some_type_id"),
@JoinColumn(name = "another_id") })
private Set<SomeType> someTypeSet;
我收到以下错误：
Repeated column in mapping for collection: com.package.name.Example.someTypeSet column: another_id
我应该看什么，这个映射的哪一部分不正确？提前致谢。