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Repeated column in mapping for entity

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franchouze

Post subject: Repeated column in mapping for entity

Posted: Wed Sep 30, 2009 4:34 am

Newbie

Joined: Wed Sep 30, 2009 4:23 am
Posts: 3

Hello,

I am trying to do persistence on object A which contains several instances of 2 objects (B & C). B and C have both an attribute of the same name therefore the mapping does not work. Moreover, as there are several instances of B and C, i can't make it work by using the @Column( name="nameB") in B and @Column( name="nameC") in C.

I am trying to prevent this error by using the @AttributeOverrides annotation but I can't make it work.

I know that I could also make it work simply by changing the name of one of the attribute but I would like to do this in a clean way.

Could someone show me a simple example plz ?

Thx
François

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franchouze

Post subject: Re: Repeated column in mapping for entity

Posted: Wed Sep 30, 2009 5:17 am

Newbie

Joined: Wed Sep 30, 2009 4:23 am
Posts: 3

What I did is :

Classe B

Code:

@Embeddable
public class B implements Serializable {

    @Column(name="NUMERO")
    private Integer numero;

setter & getter...
}

Classe C

Code:

@Embeddable
public class C implements Serializable {

    @Column(name="NUMERO")
    private Integer numero;

setter & getter...
}

class A

Code:

@Embedded
 @AttributeOverrides( {
            @AttributeOverride(name="numero", column = @Column(name="NUMERO_1") )
    } )
    private B B1;


@Embedded
 @AttributeOverrides( {
            @AttributeOverride(name="numero", column = @Column(name="NUMERO_2") )
    } )
    private B  B2;


@Embedded
 @AttributeOverrides( {
            @AttributeOverride(name="numero", column = @Column(name="NUMERO_3") )
    } )
    private C  C1;

But it does not work... still the same error about NUMERO .

Anyone can help plz ?

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franchouze

Post subject: Re: Repeated column in mapping for entity

Posted: Wed Sep 30, 2009 6:22 am

Newbie

Joined: Wed Sep 30, 2009 4:23 am
Posts: 3

one should had in B & C

Code:

@Column(name="NUMERO" , insertable=false, updatable=false)

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