Sorry for that second posting. I sent this before I subscribed to the
list, so I thought it will not be posted (now, with a latency of nearly
one day)
Regards,
Georg
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To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional
hi,
as far as i understand this, you try to differentiate by the value of
adress.type whether an adress is a home wor work adress?
well, i have no solution for that, but i tried it here with a similair data
structur, and it didn't work either.
to be honest i'm not sure if this is the intended use
Hi,
not sure that I understand the problem.
Each User has two Address attributes ('home' and 'work'), both are of
the same type 'Address' (both 1:1 references), you don't use extension
classes AddressHome and AddressWork objects. Address use a composite PK
('login' and 'type').
In this case
As far as I understand he wants to use a reference that refers to a
class with a compound primarykey, where one of the foreignkey values
is fixed:
reference-descriptor name=homeAddress
class-ref=Address
auto-update=true
Thomas Dudziak wrote:
As far as I understand he wants to use a reference that refers to a
class with a compound primarykey, where one of the foreignkey values
is fixed:
reference-descriptor name=homeAddress
class-ref=Address
auto-update=true
when showing how to implement your own ClassDescriptor. cool stuff!
kr,
guenther
-Original Message-
From: Georg Müller [mailto:[EMAIL PROTECTED]
Sent: Thursday, March 03, 2005 11:33 PM
To: OJB Users List
Subject: Re: Mapping question
Thomas Dudziak wrote:
As far as I understand he
I now have a running version, but the way Thomas proposed would be much
nicer.
I have added a collection descriptor
collection-descriptor
name=addresses
element-class-ref=Adress
auto-update=true
auto-delete=true
inverse-foreignkey field-ref=login/
/collection-descriptor
and he returns
: Re: Mapping question
Hi Daniel,
I had a look at the extents now. I think this will basically work. The
problem I see is, that the database has 110 tables and all are using a
globally generated OID. In my basic class I would have to list all other
classes as extents of this one.
What does
To simplify my question:
I have a table containing a foreign key column and the foreign key of a
row points to different tables based on the first three letters of the
foreign key. E.g. when it starts with art then it points to a record
in the article table. When it starts with cat then it
]
Subject: Re: Mapping question
To simplify my question:
I have a table containing a foreign key column and the foreign key of a
row points to different tables based on the first three letters of the
foreign key. E.g. when it starts with art then it points to a record
in the article table. When
types extend it. It would pick
the right class based on whichever table has an item with that primary key.
Daniel.
-Original Message-
From: news [mailto:[EMAIL PROTECTED] Behalf Of Sebastian
Sent: 02 June 2004 17:07
To: [EMAIL PROTECTED]
Subject: Re: Mapping question
To simplify my question
Hello Florent,
I understand this as a question about the typeB collection or the typeA
collection exclusively in the C instance?
Then you can't even model this in UML (or so I think), so I don't think you
can in OJB.
The only workaround I know without having two collections in C is a
My english is not good ;-)
What I want is in C object 2 collections one with typeA Object and one with
typeB Object. My question is how to do a mapping with OJB that can make this
kind of switch on type field.
In other word when I load A objects collection of a C object the query is :
SELECT
Hello again,
If you want C.foreignId = A.idA then the 1:n - relation between C and A
is the other way round: C would be the n-class.
But if you simply want C having two collections as attributes, it is
described in tutorial 3, mapping 1:n relations.
Was that the answer?
regards,
Birgitta
Hi Patrick.
Is the field doc_id in download_pal_model actually meant to be model_id?
Otherwise I am a touch confused :)
Also, I assume you've checked out the advanced O/R mapping stuff at
http://db.apache.org/ojb/tutorial3.html - if not, do it now!
Idea #1:
For download - model
ooops, I guess attachments are not allowed in this mailing list.
here's a link to the picture:
http://homepage.hispeed.ch/tabalooga/datamodel.jpg
the same problem of course also exists for the keyword table.
Thank you, Patrick
What do I have to do to get this join?
Thanks,
Norbert.
-Original Message-
From: eric barbe [mailto:[EMAIL PROTECTED]
Sent: Freitag, 28. November 2003 15:08
To: OJB Users List
Subject: RE: Mapping question
Hi,
I don't really understand you're pb. ;o(
Is it : any field from my class A can
]
Objet : RE: Mapping question
Thanks, I defined it like that, but:
If A is 1 and B is n.
In A class descriptor write :
collection-descriptor name=relation_name_in_A_class
element-class-ref=url.B
inverse-foreignkey field-ref=mykey/
/collection-descriptor
And in B class descriptor write
Thanks, I defined it like that, but:
If A is 1 and B is n.
In A class descriptor write :
collection-descriptor name=relation_name_in_A_class
element-class-ref=url.B
inverse-foreignkey field-ref=mykey/
/collection-descriptor
And in B class descriptor write this
field-descriptor
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