During delete org.springframework.dao.InvalidDataAccessApiUsageException: object references

[Shinu Pil]

i have two mapping files Swon and project
these are the

<?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 default-lazy="true">
	<class name="com.tel.it.model.Swon" table="swon">
		<id name="swonId" column="swonId" type="int">
			<generator class="native" />
		</id>
		<property name="SWON" type="string" column="SWON" />
				
		 <many-to-one name="project" class="com.tel.it.model.Project" fetch="select">
            <column name="projectId" />
        </many-to-one>
		
	</class>
</hibernate-mapping>

and project

<?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 default-lazy="true">
	<class name="com.tel.it.model.Project" table="project">
		<id name="projectId" column="projectId" type="int">
			<generator class="native" />
		</id>
		<property name="projectName" type="string" column="projectName" />
		<property name="startDate" type="date" column="start_date" />
		<property name="endDate" type="date" column="end_date" />
		
		 <many-to-one name="businessUnit" class="com.tel.it.model.BusinessUnit" fetch="select">
            <column name="buId" />
        </many-to-one>
		
	</class>
</hibernate-mapping>

when i tried to delete the selected record using
getHibernateTemplate().delete(entity);

showing exception as
org.springframework.dao.InvalidDataAccessApiUsageException: object references an unsaved transient instance - save the transient instance before flushing: com.tel.it.model.Project;

i tried with cascade="all" not-null="false" but noluck
could any body help me as i am new to hibernate

[Jeanne Boyarsky]

Is it right? Do you have any code referencing Project directly that could be working with an object still?

[Bill Gorder]

As Jeanne said you are calling delete on a transient entity. This means you are trying to delete an entity that is not yet persisted (does not have an id). Also the use of Hibernate template is now discouraged. Take a look at the Spring documentation for the preferred approach.

[Shinu Pil]

SHINU SHINU.R wrote:i have two mapping files Swon and project
these are the

<?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 default-lazy="true">
	<class name="it.model.Swon" table="swon">
		<id name="swonId" column="swonId" type="int">
			<generator class="native" />
		</id>
		<property name="SWON" type="string" column="SWON" />
				
		 <many-to-one name="project" class="it.model.Project" fetch="select">
            <column name="projectId" />
        </many-to-one>
		
	</class>
</hibernate-mapping>

and project

<?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 default-lazy="true">
	<class name="it.model.Project" table="project">
		<id name="projectId" column="projectId" type="int">
			<generator class="native" />
		</id>
		<property name="projectName" type="string" column="projectName" />
		<property name="startDate" type="date" column="start_date" />
		<property name="endDate" type="date" column="end_date" />
		
		 <many-to-one name="businessUnit" class="it.model.BusinessUnit" fetch="select">
            <column name="buId" />
        </many-to-one>
		
	</class>
</hibernate-mapping>

when i tried to delete the selected record using
getHibernateTemplate().delete(entity);

showing exception as
org.springframework.dao.InvalidDataAccessApiUsageException: object references an unsaved transient instance - save the transient instance before flushing: .it.model.Project;

i tried with cascade="all" not-null="false" but noluck
could any body help me as i am new to hibernate