Hey everyone,
I am new to hibernate and I am getting this annoying exception
org.hibernate.MappingException: Foreign key (FK9FBB8F107E0786C:Events_BelongsTo_Projects [p_id])) must have same number of columns as the referenced primary key (Projects [projectID,p_id])
I have 2 tables, Projects and Events, and there's a many to many relationship between them, here are the Mysql scripts
Code:
CREATE TABLE `Events`(
`e_id` int(11) auto_increment,
`name` VARCHAR(20) NOT NULL ,
`location` VARCHAR(50) NOT NULL,
`type` INT(1) NOT NULL, #see note 3
`description` VARCHAR(1500) DEFAULT NULL,
`startTime` DATETIME NOT NULL,
`endTime` DATETIME NOT NULL,
`created_by` int(11),
PRIMARY KEY(`e_id`),
FOREIGN KEY(`created_by`) REFERENCES `Users`(`u_id`) ON DELETE SET NULL ON UPDATE CASCADE)
ENGINE=INNODB DEFAULT CHARSET=Latin1;
#PROJECTS
CREATE TABLE `Projects`(
`p_id` INT(11) NOT NULL AUTO_INCREMENT,
`name`VARCHAR(100) NOT NULL,
`type` INT(1) CHECK(type between 0 and 1), #see note 4
`budget` DOUBLE,
`effort_estimation_unit`VARCHAR(100),
`description` VARCHAR(1500),
`projectID` INT(11),
`sprint_duration` int(4) CHECK(sprint_duration between 7 and 62),
PRIMARY KEY(`p_id`),
FOREIGN KEY(`projectID`)REFERENCES `Projects`(`p_id`) ON DELETE CASCADE ON UPDATE SET NULL
)ENGINE=INNODB DEFAULT Charset = Latin1;
CREATE TABLE `Events_BelongsTo_Projects`(
`e_id` int(11),
`p_id` int(11),
PRIMARY KEY (`e_id`,`p_id`),
FOREIGN KEY (`e_id`) REFERENCES `Events`(`e_id`) ON DELETE CASCADE ON UPDATE CASCADE,
FOREIGN KEY (`p_id`) REFERENCES `Projects`(`p_id`) ON DELETE CASCADE ON UPDATE CASCADE)
ENGINE=INNODB DEFAULT charset = Latin1;
and here are the hibernate xml mapping files
Code:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Apr 28, 2010 10:29:51 PM by Hibernate Tools 3.3.0.GA -->
<hibernate-mapping>
<class name="com.example.mega_scrum.newPersistenceClasses.Event" table="Events">
<id name="id" type="int">
<column name="e_id" />
<generator class="increment" />
</id>
<property name="name" type="java.lang.String">
<column name="name" />
</property>
<property name="location" type="java.lang.String">
<column name="location" />
</property>
<property name="type" type="short">
<column name="type" />
</property>
<property name="description" type="java.lang.String">
<column name="description" />
</property>
<property name="startTime" type="java.util.Date">
<column name="startTime" />
</property>
<property name="endTime" type="java.util.Date">
<column name="endTime" />
</property>
<!--<many-to-one name="creator" class="com.example.mega_scrum.newPersistenceClasses.User" fetch="join">
<column name="created_by" />
</many-to-one>
<set name="tasks" table="Events_Tasks" inverse="false" lazy="extra">
<key>
<column name="e_id" />
</key>
<many-to-many column="t_id" class="com.example.mega_scrum.newPersistenceClasses.Task" />
</set>-->
<set name="notes" table="Notes" inverse="false" lazy="extra">
<key>
<column name="e_id" />
</key>
<one-to-many class="com.example.mega_scrum.newPersistenceClasses.Note" />
</set>
<set name="snapshots" table="Events_Snapshots" inverse="false" lazy="extra">
<key>
<column name="e_id" />
</key>
<one-to-many class="com.example.mega_scrum.newPersistenceClasses.EventSnapshot" />
</set>
<!--<set name="userStories" table="Events_UserStories" inverse="false" lazy="extra">
<key>
<column name="e_id" />
</key>
<many-to-many column="us_id" class="com.example.mega_scrum.newPersistenceClasses.UserStory" />
</set>-->
<set name="projects" table="Events_BelongsTo_Projects" inverse="true" lazy="extra">
<key>
<column name="e_id" />
</key>
<many-to-many column="p_id" class="com.example.mega_scrum.newPersistenceClasses.Project" />
</set>
<set name="dependantEvents" table="Events_Events" inverse="false" lazy="extra">
<key>
<column name="e_id" />
</key>
<many-to-many column="e_id_dependant" class="com.example.mega_scrum.newPersistenceClasses.Event" />
</set>
<!--<set name="boardColumns" table="Board_Columns" inverse="false" lazy="extra">
<key>
<column name="event_id" />
</key>
<one-to-many class="com.example.mega_scrum.newPersistenceClasses.BoardColumn" />
</set>-->
</class>
</hibernate-mapping>
Code:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Apr 28, 2010 10:29:51 PM by Hibernate Tools 3.3.0.GA -->
<hibernate-mapping>
<class name="com.example.mega_scrum.newPersistenceClasses.Project" table="Projects">
<id name="id" type="int">
<column name="p_id" />
<generator class="increment" />
</id>
<property name="name" type="java.lang.String">
<column name="name" />
</property>
<property name="type" type="int">
<column name="type" />
</property>
<property name="description" type="java.lang.String">
<column name="description" />
</property>
<property name="budget" type="double">
<column name="budget" />
</property>
<property name="effortEstimationUnit" type="java.lang.String">
<column name="effort_estimation_unit" />
</property>
<property name="sprintDuration" type="int">
<column name="sprint_duration" />
</property>
<set name="components" table="Projects" inverse="false" lazy="extra">
<key>
<column name="p_id" />
</key>
<one-to-many class="com.example.mega_scrum.newPersistenceClasses.Project" />
</set>
<!--<set name="roles" table="Roles" inverse="false" lazy="extra">
<key>
<column name="p_id" />
</key>
<one-to-many class="com.example.mega_scrum.newPersistenceClasses.Role" />
</set>
<set name="taskStatus" table="Task_Status" inverse="false" lazy="extra">
<key>
<column name="project_id" />
</key>
<one-to-many class="com.example.mega_scrum.newPersistenceClasses.TaskStatus" />
</set>
<set name="projectUserstories" table="UserStories_BelongsTo_Projects" inverse="false" lazy="extra">
<key>
<column name="p_id" />
</key>
<many-to-many column="u_id" class="com.example.mega_scrum.newPersistenceClasses.UserStory" />
</set>
<set name="dependantUserstories" table="UserStories_DependsOn_Projects" inverse="false" lazy="extra">
<key>
<column name="p_id" />
</key>
<many-to-many column="us_id" class="com.example.mega_scrum.newPersistenceClasses.UserStory" />
</set>
<set name="componentUserstories" table="UserStories" inverse="false" lazy="extra">
<key>
<column name="p_id" />
</key>
<one-to-many class="com.example.mega_scrum.newPersistenceClasses.UserStory" />
</set>-->
<set name="events" table="Events_BelongsTo_Projects" inverse="true" lazy="extra">
<key>
<column name="p_id" />
</key>
<many-to-many column="e_id" class="com.example.mega_scrum.newPersistenceClasses.Event" />
</set>
<set name="logs" table="Log_Projects" inverse="false" lazy="extra">
<key>
<column name="p_id" />
</key>
<many-to-many column="l_id" class="com.example.mega_scrum.newPersistenceClasses.Log" />
</set>
</class>
</hibernate-mapping>
here's the config file
Code:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">org.gjt.mm.mysql.Driver</property>
<property name="hibernate.connection.password">root</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost/se_megasoft</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>
<mapping resource="Event.hbm.xml"/>
<mapping resource="Project.hbm.xml"/>
</session-factory>
</hibernate-configuration>
any help would be great.
Thanks
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