Here is refference about JPA annotation
http://www.oracle.com/technology/products/ias/toplink/jpa/resources/toplink-jpa-annotations.html#OneToMany
here is example:
@Entity
@Table(name="app_user")
public class User extends BaseObject implements Serializable, UserDetails {
...
protected Set<Entity> entitys = new HashSet<Entity>();
...
@OneToMany(targetEntity=Entity.class, cascade=CascadeType.ALL,
mappedBy="user", fetch = FetchType.LAZY)
public Set<Entity> getEntitys() {
return entitys;
}
...
public void setEntitys(Set<Entity> entitys) {
this.entitys = entitys;
}
...
}
@Entity
@Table(name="entity")
public class Entity extends BaseObject implements Comparable, Serializable,
Cloneable {
..
protected User user;
..
@ManyToOne(optional=false)
@JoinColumn(name="user_id", nullable=false, updatable=false)
public User getUser() {
return user;
}
...
public void setUser(User user) {
this.user = user;
}
...
//hashCode and equils functions
...
}
Hope this helps.
Fan wrote:
>
> what's the use of persistence.xml ??
>
> I saw only two following entries in the file, should I add a new entry for
> club pojo ?
>
> <class>org.appfuse.model.User</class>
> <class>org.appfuse.model.Role</class>
>
> I did try the following way:
>
> In my club POJO, I have
>
> @OneToMany
> public Set<User> getUsers()
> {
> return users;
> }
>
> in my user POJO, I have:
>
> @ManyToOne
> @JoinColumn(name="clubID")
> public Club getClub()
> {
> return club;
> }
>
> so the result is:
>
> 1) I have one column called "clubID" in user table
> 2) A table called "club_app_user" with two keys "Club_clubID", "users_id"
> generated
>
> but when I have saved the user record with "clubID" being saved
> successfully in user table, nothing did happen in "club_app_user" , in
> other words, the "club_app_user" still empty record, or do I need to save
> the record in "club_app_user" explicitly ?
>
>
> ros wrote:
>>
>> Fan,
>>
>> About 1) in pom.xml there should be
>>
>> <dependency>
>> <groupId>org.appfuse</groupId>
>> <artifactId>appfuse-${web.framework}</artifactId>
>> <version>${appfuse.version}</version>
>> <type>warpath</type>
>> <exclusions>
>> <!-- This exclusion and the dependency following this one
>> allow DAO framework switching. -->
>> <!-- You only need these if you want to use JPA or
>> iBATIS. See APF-565 for more information. -->
>> <!-- It does no harm to leave it in for Hibernate, but
>> it's not needed. -->
>> <exclusion>
>> <groupId>org.appfuse</groupId>
>> <artifactId>appfuse-hibernate</artifactId>
>> </exclusion>
>> </exclusions>
>> </dependency>
>> <dependency>
>> <groupId>org.appfuse</groupId>
>> <artifactId>appfuse-${dao.framework}</artifactId>
>> <version>${appfuse.version}</version>
>> <exclusions>
>> <exclusion>
>> <groupId>org.appfuse</groupId>
>> <artifactId>appfuse-data-common</artifactId>
>> </exclusion>
>> </exclusions>
>> </dependency>
>>
>> Check / src / main / resources / META-INF / persistence.xml
>>
>>
>> Fan wrote:
>>>
>>> Hey ros:
>>>
>>> 1)The original pom.xml already has the exclusion :
>>>
>>> <dependency>
>>> <groupId>org.appfuse</groupId>
>>> <artifactId>appfuse-${web.framework}</artifactId>
>>> <version>${appfuse.version}</version>
>>> <type>warpath</type>
>>> <!-- This exclusion and the dependency following this one
>>> allow DAO framework switching. -->
>>> <!-- You only need these if you want to use JPA or iBATIS.
>>> See APF-565 for more information. -->
>>> <!-- It does no harm to leave it in for Hibernate, but it's
>>> not needed. -->
>>> <exclusions>
>>> <exclusion>
>>> <groupId>org.appfuse</groupId>
>>> <artifactId>appfuse-hibernate</artifactId>
>>> </exclusion>
>>> </exclusions>
>>> </dependency>
>>>
>>> 2) what did you mean by "Then add in to your poroject User and Role
>>> pojos at appfuse namespace" ?
>>>
>>> 3) I did check the user pojo, it does has the foreign key club_clubID
>>>
>>> 4) Yup, I am using M5
>>>
>>> 5) I did include the bean definition in applicationContext.xml
>>>
>>> <bean class="org.appfuse.dao.spring.HibernateExtensionPostProcessor">
>>> <property name="annotatedClasses">
>>> <list>
>>> <value>com.smartclub.model.Club</value>
>>> <value>com.smartclub.model.Facility</value>
>>> </list>
>>> </property>
>>> </bean>
>>>
>>> 6) I did include the mapping in hibernate.cfg.xml as well
>>>
>>> <hibernate-configuration>
>>> <session-factory>
>>> <mapping class="org.appfuse.model.User"/>
>>> <mapping class="org.appfuse.model.Role"/>
>>> <mapping class="com.smartclub.model.Club"/>
>>> <mapping class="com.smartclub.model.Facility"/>
>>> </session-factory>
>>> </hibernate-configuration>
>>>
>>>
>>> What else I have to check ??
>>>
>>>
>>> ros wrote:
>>>>
>>>> Hi!
>>>>
>>>> You have to exclude AppFuse Data Common Package in your pom.xml. Then
>>>> add in to your poroject User and Role pojos at appfuse namespace (as
>>>> described in http://www.appfuse.org/display/APF/AppFuse+Core+Classes)
>>>>
>>>> Try to do mvn clean compile hibernate3:hbm2ddl and check database for
>>>> user table structure. If it does not contains fields defined in User
>>>> pojo of your project then AppFuse Data Common Package is not excluded.
>>>>
>>>> What is your version of appfuse, M5?
>>>>
>>>> Regards,
>>>> ros
>>>>
>>>>
>>>>
>>>> Fan wrote:
>>>>>
>>>>> Hey Ros:
>>>>>
>>>>> I did add the related Object to both hibernate.cfg.xml and
>>>>> applicationContext.xml. But it just does not work
>>>>>
>>>>> Or do you mind to show me your hibernate.cfg.xml and
>>>>> applicationContext.xml ? I afraid I might do it wrongly
>>>>>
>>>>> Is that necessary to exclude the AppFuse Data Common Package ?
>>>>>
>>>>>
>>>>> ros wrote:
>>>>>>
>>>>>> Hi!
>>>>>>
>>>>>> I resolve that by add my Contact object to both hibernate.cfg.xml and
>>>>>> applicationContext.xml.
>>>>>>
>>>>>> Reffer to http://www.appfuse.org/display/APF/AppFuse+Core+Classes
>>>>>>
>>>>>> Hope this helps.
>>>>>>
>>>>>> ros
>>>>>>
>>>>>>
>>>>>>
>>>>>> Fan wrote:
>>>>>>>
>>>>>>> Ros,
>>>>>>>
>>>>>>> What's the fix ? I am facing the same error as you did
>>>>>>>
>>>>>>>
>>>>>>> ros wrote:
>>>>>>>>
>>>>>>>> Right. Thanks Matt!
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>
>>>
>>
>>
>
>
--
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