Re: [eclipselink-users] Entity relationship issue

[khaskett <khaskett@xxxxxxxxxxx>]

I added that and I still get this error -
[IBM][SQLServer JDBC Driver][SQLServer]Invalid object name 'CPUSER_CP_MSG'.
Call: SELECT t1.MSG_ID, t1.MSG_TEXT, t1.CPUSER_paramUserID FROM
CPUSER_CP_MSG t0, CP_MSG t1 WHERE ((t0.CpUser_paramUserID = ?) AND
(t1.MSG_ID = t0.messages_MSG_ID))
	bind => [USER123       ]

I guess what I thought would happen is this call 
SELECT t1.MSG_ID, t1.MSG_TEXT, t1.CPUSER_paramUserID FROM CPUSER_CP_MSG t0,
CP_MSG t1 WHERE t1.USER_ID = ?

Thanks for reply.
Kevin


Tim Hollosy wrote:
> 
> You forgot the mappedBy attribute in your @ManyToOne annotation it
> should be @ManyToOne(fetch = FetchType.LAZY,mappedBy="messages")
> 
> You might try to generate your Entities using the Dali JPA Tools in
> Eclipse to see the proper way to do these mappings.
> 
> ./tch
> 
> 
> 
> On Tue, Dec 2, 2008 at 11:59 PM, khaskett <khaskett@xxxxxxxxxxx> wrote:
>>
>> I added the @ManyToOne and i still get the same error -
>>
>> public class CpUser extends BaseDomain {
>> ....
>>    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy
>> =
>> "cpUser")
>>    @JoinColumn(referencedColumnName = "USER_ID")
>>    public Set<CpMsg> getMessages() {
>>        return messages;
>>    }
>>
>> public class CpMsg extends BaseDomain {
>> ....
>>    @ManyToOne(fetch = FetchType.LAZY)
>>        public CpUser getCpUser() {
>>                return this.cpUser;
>>        }
>>
>> Thanks for the reply.
>>
>>
>> Tim Hollosy wrote:
>>>
>>> It doesn't look like your relationship is defined in both entities. In
>>> JPA you always need to make sure you do this. You need to have the
>>> @ManyToOne annotation back in your CpMsg entity.
>>>
>>> Check: http://en.wikibooks.org/wiki/Java_Persistence/OneToMany
>>>
>>> for more info.
>>> ./tch
>>>
>>>
>>>
>>> On Tue, Dec 2, 2008 at 6:20 PM, khaskett <khaskett@xxxxxxxxxxx> wrote:
>>>>
>>>> I am having an issue with creating a relationship between 2 entities,
>>>> where
>>>> the parent entity was created from a Stored Procedure. When I try to
>>>> use
>>>> the
>>>> @OneToMany annotation it tries to join the two entities.
>>>>
>>>> @Entity
>>>> public class CpUser extends BaseDomain {
>>>>
>>>>    // Attributes
>>>>    @Id
>>>>    @Column(name = "paramUserID")
>>>>    private String userId;
>>>>
>>>>    @Column(name = "paramInitials")
>>>>    private String initials;
>>>>
>>>>    @Column(name = "paramFirstName")
>>>>    private String firstName;
>>>>
>>>>    @Column(name = "paramLastName")
>>>>    private String lastName;
>>>>
>>>>     .....
>>>>
>>>>    /*
>>>>     * List of user messages
>>>>     */
>>>>    private Set<CpMsg> messages = new HashSet<CpMsg>(0);
>>>>
>>>>   .....
>>>>    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY,
>>>> mappedBy
>>>> =
>>>> "userId")
>>>>    public Set<CpMsg> getMessages() {
>>>>        return messages;
>>>>    }
>>>> }  // End CpUser
>>>>
>>>> @Entity
>>>> @Table(name = "CP_MSG")
>>>> public class CpMsg extends BaseDomain {
>>>>
>>>>        // Fields
>>>>        @Id
>>>>        @GeneratedValue(strategy = GenerationType.IDENTITY)
>>>>        @Column(name = "MSG_ID", unique = true, nullable = false,
>>>> precision = 11,
>>>> scale = 0)
>>>>        private Long msgId;
>>>>        @Column(name = "MSG_TEXT", nullable = false)
>>>>        private String msgText;
>>>>
>>>>        private CpUser cpUser;
>>>>    ....
>>>>        public CpUser getCpUser() {
>>>>                return this.cpUser;
>>>>        }
>>>> } //End CpMsg
>>>>
>>>> I removed some fields for brevity.
>>>> When I try and get the messages for that user by calling getMessages()
>>>> I
>>>> get
>>>> this in the logs -
>>>> Call: SELECT t1.MSG_ID, t1.MSG_TEXT, t1.USER_ID FROM CPUSER_CP_MSG t0,
>>>> CP_MSG t1 WHERE ((t0.CpUser_paramUserID = ?) AND (t1.MSG_ID =
>>>> t0.messages_MSG_ID))
>>>>        bind => [USER123]
>>>>
>>>> And the error is that CPUSER_CP_MSG doesnt exist, which is correct.
>>>>
>>>> I guess I assumed it would just do a select on the child table passing
>>>> in
>>>> the value from the parent.
>>>>
>>>> Thanks in advance
>>>>
>>>> --
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>>>>
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>>>
>>>
>>
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