hibernate inverse cascade详解_2
??????????? <key column="aid"/>
??????????? <one-to-many column="aid" cascade="all" /> (在下面的本用例表中的第1，2属性 )
结合上面说明得表为：
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | true | all?? |????????? |????????? |
+-------+-------+-------+ true??? | false?? |
| t2oo |?????? | all?? |????????? |????????? |
+-------+-------+-------+----------+----------+
4.执行 Hibernate语句 ：
??? Hibernate: insert into t1oo (name, id) values (?, ?)
??? Hibernate: insert into t2oo (version, avg, aid, id) values (?, ?, ?, ?)
5.结果为：
mysql> select * from t2oo;
+----+-----+------+---------+
| id | avg | aid | version |
+----+-----+------+---------+
| 2 | 24 | NULL |?????? 0 | //主要就是看 aid属性
+----+-----+------+---------+
1 row in set (0.00 sec)
mysql> select * from t1oo; // 因为 T1oo总是可以 Save 下面就不再提了
+----+------+
| id | name |
+----+------+
| 2 | xx?? |
+----+------+
1 row in set (0.00 sec)
可改项：
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | 可改4 | 可改2 |????????? |????????? |
+-------+-------+-------+?????????? |?? 可改1 |
| t2oo |?????? | 可改3 |?????????? |????????? |
+-------+-------+-------+----------+----------+
?
主本:
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | true | all?? |????????? |????????? |
+-------+-------+-------+ true??? | true??? |
| t2oo |?????? | all?? |????????? |????????? |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: insert into t2oo (version, avg, aid, id) values (?, ?, ?, ?)
mysql> select * from t2oo;
+----+-----+------+---------+
| id | avg | aid | version |
+----+-----+------+---------+
| 1 | 24 |??? 1 |?????? 0 |
+----+-----+------+---------+
1 row in set (0.00 sec)
改1
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | true | all?? |????????? |????????? |
+-------+-------+-------+ true??? | false?? |
| t2oo |?????? | all?? |????????? |????????? |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: insert into t2oo (version, avg, aid, id) values (?, ?, ?, ?)
mysql> select * from t2oo;
+----+-----+------+---------+
| id | avg | aid | version |
+----+-----+------+---------+
| 1 | 24 | NULL|?????? 0 |
+----+-----+------+---------+
1 row in set (0.00 sec)
改2
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | true |?????? |????????? |????????? |
+-------+-------+-------+ true??? | true??? |
| t2oo |?????? | all?? |????????? |????????? |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Empty set (0.00 sec)
改2 改1
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | true |?????? |????????? |????????? |
+-------+-------+-------+ true??? | false?? |
| t2oo |?????? | all?? |????????? |????????? |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Empty set (0.00 sec)
改3
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | true | all?? |????????? |????????? |
+-------+-------+-------+ true??? | true??? |
| t2oo |?????? |?????? |????????? |????????? |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: insert into t2oo (version, avg, aid, id) values (?, ?, ?, ?)
mysql> select * from t2oo;
+----+-----+------+---------+
| id | avg | aid | version |
+----+-----+------+---------+
| 1 | 24 |??? 1 |?????? 0 |
+----+-----+------+---------+
1 row in set (0.00 sec)
改3 改2
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | true |?????? |????????? |????????? |
+-------+-------+-------+ true??? | true??? |
| t2oo |?????? |?????? |??? |????????? |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Empty set (0.00 sec)
改3 改1
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | true | all?? |????????? |????????? |
+-------+-------+-------+ true??? | false?? |
| t2oo |?????? |?????? |??? |????????? |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: insert into t2oo (version, avg, aid, id) values (?, ?, ?, ?)
mysql> select * from t2oo;
+----+-----+------+---------+
| id | avg | aid | version |
+----+-----+------+---------+
| 1 | 24 | NULL |?????? 0 |
+----+-----+------+---------+
1 row in set (0.00 sec)
改3 改2 改1
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | true |?????? |????????? |????????? |
+-------+-------+-------+ true??? | false?? |
| t2oo |?????? |?????? |????????? |????????? |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Empty set (0.00 sec)
改4
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | false | all?? |????????? |????????? |
+-------+-------+-------+ true??? | true??? |
| t2oo |?????? | all?? |????????? |????????? |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: insert into t2oo (version, avg, aid, id) values (?, ?, ?, ?)
Hibernate: update t2oo set aid=? where id=?
mysql> select * from t2oo;
+----+-----+------+---------+
| id | avg | aid | version |
+----+-----+------+---------+
| 1 | 24 |??? 1 |?????? 0 |
+----+-----+------+---------+
1 row in set (0.02 sec)
改4 改1
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | false | all?? |????????? |????????? |
+-------+-------+-------+ true??? | false?? |
| t2oo |?????? | all?? |??? |????????? |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: insert into t2oo (version, avg, aid, id) values (?, ?, ?, ?)
Hibernate: update t2oo set aid=? where id=?
mysql> select * from t2oo;
+----+-----+------+---------+
| id | avg | aid | version |
+----+-----+------+---------+
| 1 | 24 |??? 1 |?????? 0 |
+----+-----+------+---------+
1 row in set (0.00 sec)
改4 改2
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | false | |????????? |????????? |
+-------+-------+-------+ true??? | true??? |
| t2oo |?????? | all?? |??? |????????? |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: update t2oo set aid=? where id=?
Empty set (0.00 sec)
改4 改3
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | false | all?? |????????? |????????? |
+-------+-------+-------+ true??? | true??? |
| t2oo |?????? |?????? |??? |????????? |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: insert into t2oo (version, avg, aid, id) values (?, ?, ?, ?)
Hibernate: update t2oo set aid=? where id=?
mysql> select * from t2oo;
+----+-----+------+---------+
| id | avg | aid | version |
+----+-----+------+---------+
| 1 | 24 |??? 1 |?????? 0 |
+----+-----+------+---------+
1 row in set (0.00 sec)
改4 改3 改2
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | false |?????? |????????? |????????? |
+-------+-------+-------+ true??? | true??? |
| t2oo |?????? |?????? |??? |????????? |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: update t2oo set aid=? where id=?
Empty set (0.00 sec)
改4 改1 改2
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | false |?????? |????????? |????????? |
+-------+-------+-------+ true??? | false?? |
| t2oo |?????? | all?? |????????? |????????? |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: update t2oo set aid=? where id=?
Empty set (0.00 sec)
改4 改1 改3
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | false | all |????????? |????????? |
+-------+-------+-------+ true??? | false?? |
| t2oo |?????? |?????? |????????? |????????? |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: insert into t2oo (version, avg, aid, id) values (?, ?, ?, ?)
Hibernate: update t2oo set aid=? where id=?
mysql> select * from t2oo;
+----+-----+------+---------+
| id | avg | aid | version |
+----+-----+------+---------+
| 1 | 24 |??? 1 |?????? 0 |
+----+-----+------+---------+
1 row in set (0.02 sec)
改4 改3 改2 改1
+-------+-------+-------+----------+----------+
|hbn.xml|inverse|cascade|t1oo->t2oo|t2oo->t1oo|
+-------+-------+-------+----------+----------+
| t1oo | false |?????? |????????? |????????? |
+-------+-------+-------+ true??? | false?? |
| t2oo |?????? |?????? |????????? |????????? |
+-------+-------+-------+----------+----------+
Hibernate: insert into t1oo (name, id) values (?, ?)
Hibernate: update t2oo set aid=? where id=?
Empty set (0.00 sec)
转载：http://hi.baidu.com/accpandsvse/blog/item/affba311fce7be08213f2e58.html
