休眠多對多級聯不起作用

我是一個hibernate新手，我不完全知道如何獲得我期待的級聯行爲。休眠多對多級聯不起作用

我有兩個班學生和類與單向多對多映射。當我刪除一個學生，我有此異常

Cannot delete or update a parent row: a foreign key constraint fails (projet.T_CLASS_STUDENT, CONSTRAINT FK5DBF3D8967BCDD8B FOREIGN KEY (PERSON_ID) REFERENCES T_STUDENT (PERSON_ID))

我不明白爲什麼，我設置級聯「刪除」，但它不工作！事實上，當我刪除一個學生時，我想刪除所有在asoociation表中的Student。

我的映射文件是：

<class name="persistenceClass.Class" table="T_CLASS"> 

    <id name="Id" column="CLASS_ID"> 
     <generator class="native" /> 
    </id> 
    <many-to-one name="Formation" column="CLASS_FORMATION" class="persistenceClass.Formation" /> 
    <many-to-one name="Year" column="CLASS_YEAR" class="persistenceClass.Year" /> 
    <set name="Students" table="T_CLASS_STUDENT" cascade="delete" > 
     <key column="CLASS_ID" /> 
     <many-to-many class="persistenceClass.Student" column="PERSON_ID" />   
    </set> 
</class>

和：

<class name="persistenceClass.Person" table="T_PERSON" > 

    <id name="Id" column="PERSON_ID" > 
     <generator class="native" /> 
    </id> 
    <property name="FirstName" column="PERSON_FIRST_NAME" not-null="true" /> 
    <property name="LastName" column="PERSON_LAST_NAME" not-null="true" /> 
    <property name="Type" column="PERSON_TYPE" not-null="true" /> 
    <property name="BirthDate" column="PERSON_BIRTH_DATE" /> 
    <property name="BirthCity" column="PERSON_BIRTH_CITY" /> 
    <property name="PhoneNumber" column="PERSON_PHONE_NUMBER" /> 
    <property name="MobileNumber" column="PERSON_MOBILE_NUMBER" /> 
    <property name="Mail" column="PERSON_MAIL" /> 
    <property name="Address" column="PERSON_ADDRESS_ADDRESS" /> 
    <property name="ZipCode" column="PERSON_ADDRESS_ZIPCODE" /> 
    <property name="City" column="PERSON_ADDRESS_CITY" /> 
    <property name="Image" column="PERSON_IMAGE" type="image" /> 
    <many-to-one name="Country" column="PERSON_ADDRESS_COUNTRY" class="persistenceClass.Country" /> 
    <many-to-one name="BirthCountry" column="PERSON_BIRTH_COUNTRY" class="persistenceClass.Country" /> 
    <many-to-one name="Civility" column="PERSON_CIVILITY" class="persistenceClass.Civility" /> 
    <many-to-one name="Sex" column="PERSON_SEX" class="persistenceClass.Sex" /> 
    <joined-subclass name="persistenceClass.Student" table="T_STUDENT"> 
     <key column="PERSON_ID" /> 
    </joined-subclass> 
    <joined-subclass name="persistenceClass.Teacher" table="T_TEACHER"> 
     <key column="PERSON_ID" /> 
    </joined-subclass> 
</class>

感謝很多像你描述

來源

2010-11-22 Geotinc