级联保存，在一方保存时无法把多方的Id同时保存。麻烦看看我的代码哪里有问题！

qaq123147 2015-05-09 11:00:11

hibernate交给Spring管理
我的任务类.hbm.xml

<class name="my.sys.xmgl.assignment.entity.AdcAssignment" table="adc_assignment">

        <id name="assigId" type="java.lang.Integer">

            <column name="assigId" />

            <generator class="native" />

        </id>

        <many-to-one name="project" class="my.sys.xmgl.project.entity.AdcProjects">

            <column name="project_id" />

        </many-to-one>

        <property name="name" type="java.lang.String">

            <column name="name" length="20" />

        </property>

        <property name="createtime" type="java.util.Date">

            <column name="createtime" length="10"  />

        </property>

        <property name="isRelease" type="java.lang.Boolean">

            <column name="isRelease" />

        </property>

        <property name="state" type="java.lang.String">

            <column name="state" length="1" />

        </property>

        <property name="memo" type="java.lang.String">

            <column name="memo" length="200" />

        </property>

项目类.hbm.xml

<class name="my.sys.xmgl.project.entity.AdcProjects" table="adc_projects">

        <id name="projectId" type="java.lang.Integer">

            <column name="project_id" />

            <generator class="native" />

        </id>

        

        <property name="name" type="java.lang.String">

            <column name="name" length="20" not-null="true" />

        </property>

        <property name="baseyear" type="java.lang.String">

            <column name="baseyear" length="4" not-null="true" />

        </property>

        <property name="basemonth" type="java.lang.String">

            <column name="basemonth" length="2" not-null="true" />

        </property>

        <property name="baseday" type="java.lang.String">

            <column name="baseday" length="2" not-null="true" />

        </property>

        <property name="scale" type="java.util.Date">

            <column name="scale" length="10"/>

        </property>

        <property name="createtime" type="java.util.Date">

            <column name="createtime" length="10"/>

        </property>

        <property name="state" type="java.lang.String">

            <column name="state" length="1" />

        </property>

        <property name="finishtime" type="java.util.Date">

            <column name="finishtime" length="10"/>

        </property>

        <property name="isArchived" type="java.lang.Boolean">

            <column name="isArchived" length="1"/>

        </property>

        <property name="memo" type="java.lang.String">

            <column name="memo" length="200" />

        </property>

        

        <set name="adcassignments" lazy="false" cascade="save-update,delete">

        	<key>

        		<column name="project_id"/>

        	</key>

        	<one-to-many class="my.sys.xmgl.assignment.entity.AdcAssignment"/>

        </set>

    </class>

我在任务的添加页面有一个单选框，拿到项目的id，然后传给Action，
我觉得是不是我的serviceimpl有问题。
dao层

@Override

	public void saveAssignmentProjectId(AdcAssignment assignment) {

		getHibernateTemplate().save(assignment);

	}

service层

@Override

	public void saveAssignmentProjectId(AdcAssignment assignment,Integer... projectIds) {

		save(assignment);

		if (projectIds != null) {

			for (Integer projectId : projectIds) {

				assignmentDao.saveAssignmentProjectId(new AdcAssignment(assignment.getAssigId(),new AdcProjects(projectId)));

			}

		}

	}

我运行时发现执行了2条SQL

Hibernate: insert into adc_assignment (project_id, name, createtime, isRelease, state, memo) values (?, ?, ?, ?, ?, ?)

Hibernate: insert into adc_assignment (project_id, name, createtime, isRelease, state, memo) values (?, ?, ?, ?, ?, ?)

然后因为我的属性是不能为空的，所以他报错了。如果我设置全部属性能空值时，数据库里面就保存了2条数据，一条是任务全部信息的，一条是只有任务ID和项目ID。
为什么会出现这种问题？是不是我的service层保存的方法有问题？请大神不吝赐教！谢谢大家了。

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