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我有一個名爲Profile
的實體,它的主鍵實際上應該是指向RegisteredUser
的外鍵。將約束外鍵添加到JPA中的實體
目前,這就是我想說的是,在Profile
場既是它的主鍵和外鍵引用RegisteredUser
:
@Id
@OneToOne
@JoinColumn(foreignKey = @ForeignKey(name = "REGISTERED_USER_FK"))
private RegisteredUser registeredUser;
,並在RegisteredUser
實體,我有以下幾點:
@OneToOne(cascade = CascadeType.ALL, mappedBy = "registeredUser")
private Profile profile;
不幸的是,當我運行SpringBootApplication,我有以下錯誤:
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'registered_user_username' cannot be null
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_40]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_40]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_40]
at java.lang.reflect.Constructor.newInstance(Constructor.java:422) ~[na:1.8.0_40]
at com.mysql.jdbc.Util.handleNewInstance(Util.java:404) ~[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.Util.getInstance(Util.java:387) ~[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:932) ~[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3878) ~[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3814) ~[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2478) ~[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2625) ~[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2551) ~[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1861) ~[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.PreparedStatement.executeUpdateInternal(PreparedStatement.java:2073) ~[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.PreparedStatement.executeUpdateInternal(PreparedStatement.java:2009) ~[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.PreparedStatement.executeLargeUpdate(PreparedStatement.java:5094) ~[mysql-connector-java-5.1.38.jar:5.1.38]
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1994) ~[mysql-connector-java-5.1.38.jar:5.1.38]
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:208) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
... 42 common frames omitted
當我嘗試運行此代碼:
User user = new User("blah");
repo.save(user); // using repositories to store entities to the db
Profile profile = new Profile(user.getFirstName());
RegisteredUser rUser = new RegisteredUser(user.getUsername(), profile);
rur.save(rUser);
我檢查,看看用戶的用戶名是空的,但它不是......問題是,當我保存rUser
...
列'registered_user_username'屬於哪個實體,'RegisteredUser'? – aribeiro
爲什麼要從用戶分離配置文件?沒有用戶對象可以配置文件嗎? – WeMakeSoftware
@aribeiro沒有這樣的專欄。我在'RegisteredUser'中有一個名爲'username'的字段,它也應該是'RegisteredUser'的主鍵,但也應該是一個引用'User'主鍵的外鍵...... – nbro