Hibernate 当父项被删除时，而不是子项正在删除其更新
我的问题是当我删除父对象时，子对象不会被删除，而是会删除子对象，子表正在更新。父表是Hibernate 当父项被删除时，而不是子项正在删除其更新,hibernate,hibernate-mapping,hibernate-onetomany,Hibernate,Hibernate Mapping,Hibernate Onetomany,我的问题是当我删除父对象时，子对象不会被删除，而是会删除子对象，子表正在更新。父表是Employee，子表是EmployeeProject员工和项目之间存在一对多关系一名员工有多个项目我做了什么请检查我错在哪里这是控制台上显示的查询 Hibernate: update employee_project set employeeNumber=null where employeeNumber=? Hibernate: delete from employee where EMPLOYEE_NUMB
EmployeeEmployeeProjectHibernate: update employee_project set employeeNumber=null where employeeNumber=?
Hibernate: delete from employee where EMPLOYEE_NUMBER=?
public boolean deleteEmployee(Employee employee) {
Transaction transaction = null;
boolean flag;
try {
transaction = session.beginTransaction();
session.delete(employee);
transaction.commit();
flag = true;
} catch (HibernateException exception) {
if (transaction != null)
transaction.rollback();
flag = false;
}
return flag;
}
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.nousinfo.tutorial.model">
<class name="Employee" table="employee">
<meta attribute="class-description">
This class contains the employee detail
</meta>
<id name="employeeNumber" type="int" column="EMPLOYEE_NUMBER">
</id>
<property name="firstName" type="string" column="FIRST_NAME"></property>
<property name="lastName" type="string" column="LAST_NAME"></property>
<set name="employeeProjects" cascade="all-delete-orphan" lazy="false"
inverse="true">
<key column="employeeNumber" />
<one-to-many class="com.nousinfo.tutorial.model.EmployeeProject" />
</set>
<property name="address1" type="string" column="ADDRESS_1"></property>
</class>
</hibernate-mapping>
此类包含员工详细信息
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.nousinfo.tutorial.model">
<class name="EmployeeProject" table="employee_project">
<meta attribute="class-description">
This class contains the employee detail
</meta>
<composite-id>
<key-property name="employeeNumber" type="int"
column="EMPLOYEE_NUMBER"></key-property>
<key-property name="projectCode" type="string" column="PROJECT_CODE"></key-property>
</composite-id>
<property name="startDate" type="date" column="START_DATE"></property>
<property name="endDate" type="date" column="END_DATE"></property>
<property name="role" type="string" column="PROJECT_ROLE"></property>
<many-to-one name="employee" class="com.nousinfo.tutorial.model.Employee" ></many-to-one>
</class>
</hibernate-mapping>
此类包含员工详细信息
cascade=all delete orphan也用于删除子实体，它当然适用于不同的场景。当关系被切断时，它将删除子实体。例如，如果从父实体中的集合中删除子实体，则当hibernate会话关闭时，子实体将被删除。当子实体逻辑上没有父实体就无法存在时，此级联类型非常有用。在employee.hbm.xml中，删除标志inverse=“true”并将级联修改为cascade=“all”。在这里输入reverse=“true”意味着此关系的所有者是EmployeeProject而不是Employee，这不是我们想要的
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.nousinfo.tutorial.model.Employee" table="EMPLOYEE">
<id type="int" name="employeeId" column="EMPLOYEE_ID"/>
<set name="employeeProjects" cascade="all">
<key column="EMPLOYEE_ID"/>
<one-to-many class="com.nousinfo.tutorial.model.EmployeeProject"/>
</set>
</class>
</hibernate-mapping>
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.nousinfo.tutorial.model.EmployeeProject" table="EMPLOYEE_PROJECT">
<composite-id>
<key-property type="int" name="employeeId" column="EMPLOYEE_ID"/>
<key-property type="string" name="projectCode" column="PROJECT_CODE"/>
</composite-id>
<many-to-one name="employee" column="EMPLOYEE_ID" insert="false" update="false"/>
</class>
</hibernate-mapping>