我在删除单向 OneToMany 关系中的所有者对象时遇到问题。
相关位是我有三个对象：Acronym、Expansion 和 Tag。
- Acronym 与 Expansion 具有单向 OneToMany 关系
- 扩展与 Tag 具有双向多对多关系
这是代码：
@Entity
public class Acronym extends Model {
@OneToMany(cascade = CascadeType.ALL, orphanRemoval = true)
@JoinColumn(name = "acronym_id")
public Set<Expansion> expansions;
...
}
@Entity
public class Expansion extends Model {
@ManyToMany
public Set<Tag> tags;
...
}
@Entity
public class Tag extends Model {
@ManyToMany(mappedBy = "tags")
public Set<Expansion> expansions;
...
}
现在，当我尝试删除 Acronym 对象时，出现以下错误：
[error] Test models.AcronymTest.testAsJSON failed: javax.persistence.PersistenceException: org.h2.jdbc.JdbcSQLException: Referential integrity constraint violation: "FK_EXPANSION_TAG_EXPANSION_01: PUBLIC.EXPANSION_TAG FOREIGN KEY(EXPANSION_ID) REFERENCES PUBLIC.EXPANSION(ID) (7)"; SQL statement:
[error] delete from expansion where acronym_id = ? [23503-168]
[error] at com.avaje.ebeaninternal.server.persist.ExeUpdateSql.execute(ExeUpdateSql.java:76)
[error] at com.avaje.ebeaninternal.server.persist.DefaultPersistExecute.executeSqlUpdate(DefaultPersistExecute.java:125)
[error] at com.avaje.ebeaninternal.server.core.PersistRequestUpdateSql.executeNow(PersistRequestUpdateSql.java:44)
[error] at com.avaje.ebeaninternal.server.core.PersistRequest.executeStatement(PersistRequest.java:74)
[error] at com.avaje.ebeaninternal.server.core.PersistRequestUpdateSql.executeOrQueue(PersistRequestUpdateSql.java:49)
[error] at com.avaje.ebeaninternal.server.persist.DefaultPersister.executeSqlUpdate(DefaultPersister.java:147)
[error] at com.avaje.ebeaninternal.server.persist.DefaultPersister.deleteManyDetails(DefaultPersister.java:1169)
[error] at com.avaje.ebeaninternal.server.persist.DefaultPersister.deleteAssocMany(DefaultPersister.java:1143)
[error] at com.avaje.ebeaninternal.server.persist.DefaultPersister.delete(DefaultPersister.java:624)
[error] at com.avaje.ebeaninternal.server.persist.DefaultPersister.delete(DefaultPersister.java:452)
[error] at com.avaje.ebeaninternal.server.core.DefaultServer.delete(DefaultServer.java:1867)
[error] at com.avaje.ebeaninternal.server.core.DefaultServer.delete(DefaultServer.java:1857)
[error] at com.avaje.ebean.Ebean.delete(Ebean.java:648)
[error] at play.db.ebean.Model.delete(Model.java:167)
[error] at models.AcronymTest.testAsJSON(AcronymTest.java:201)
[error] ...
[error] Caused by: org.h2.jdbc.JdbcSQLException: Referential integrity constraint violation: "FK_EXPANSION_TAG_EXPANSION_01: PUBLIC.EXPANSION_TAG FOREIGN KEY(EXPANSION_ID) REFERENCES PUBLIC.EXPANSION(ID) (7)"; SQL statement:
[error] delete from expansion where acronym_id = ? [23503-168]
[error] at org.h2.message.DbException.getJdbcSQLException(DbException.java:329)
[error] at org.h2.message.DbException.get(DbException.java:169)
[error] at org.h2.message.DbException.get(DbException.java:146)
[error] at org.h2.constraint.ConstraintReferential.checkRow(ConstraintReferential.java:414)
[error] at org.h2.constraint.ConstraintReferential.checkRowRefTable(ConstraintReferential.java:431)
[error] at org.h2.constraint.ConstraintReferential.checkRow(ConstraintReferential.java:307)
[error] at org.h2.table.Table.fireConstraints(Table.java:871)
[error] at org.h2.table.Table.fireAfterRow(Table.java:888)
[error] at org.h2.command.dml.Delete.update(Delete.java:99)
[error] at org.h2.command.CommandContainer.update(CommandContainer.java:75)
[error] at org.h2.command.Command.executeUpdate(Command.java:230)
[error] at org.h2.jdbc.JdbcPreparedStatement.executeUpdateInternal(JdbcPreparedStatement.java:156)
[error] at org.h2.jdbc.JdbcPreparedStatement.executeUpdate(JdbcPreparedStatement.java:142)
[error] at com.jolbox.bonecp.PreparedStatementHandle.executeUpdate(PreparedStatementHandle.java:203)
[error] at com.avaje.ebeaninternal.server.persist.ExeUpdateSql.execute(ExeUpdateSql.java:68)
[error] ... 48 more
我已尝试通读 JPA 2.0 规范及其关于关系映射默认值的部分，并包含了我认为给定我的对象关系的相关注释，但有些东西无法正常工作。此应用程序是基于 Java Play 构建的！框架（2.1.3 版）仅供参考。
关于我可能做错了什么的任何想法？
注意：
我正在寻找的功能是
当您创建/更新/删除首字母缩略词时，还应创建/更新/删除任何相关的扩展
当您删除扩展或标签时，关联的标签或扩展分别不会受到影响（标签可以在没有关联的扩展的情况下存在，反之亦然）