Hi,
I have an object User who has 2 addresses, home and work.
User is mapped to a table user (no problem here).
Both home and work address are mapped to a table address.
This table has a composite primary key: login and type
- login from table user as a foreign key
- type is a string (or enum)
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
also interested in a solution for that!
kr,
guenther
-Original Message-
From: Georg Müller [mailto:[EMAIL PROTECTED]
Sent: Wednesday, March 02, 2005 9:24 PM
To: ojb-user@db.apache.org
Subject: Mapping question
Hi,
I have an object User who has 2 addresses, home and work.
User is mapped
:[EMAIL PROTECTED]
Sent: Wednesday, March 02, 2005 9:24 PM
To: ojb-user@db.apache.org
Subject: Mapping question
Hi,
I have an object User who has 2 addresses, home and work.
User is mapped to a table user (no problem here).
Both home and work address are mapped to a table address.
This table has
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
Hi,
I have an object User who has 2 addresses, one for home and one for work.
User is mapped to a table user (no problem here).
Both home and work address are mapped to a table address.
This table has a composite primary key: login and type
- login from table user as a foreign key
- type is a
: 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,
I want to know if it's possible (and how could I do that) to map this kind of
relation in OJB.
Table A
idA
otherFields
Table B
idB
otherFields
Table C
idC
foreignId
type
otherFields
Relation : C - A 1:n
C - B 1:n
example :
A
a1 ...
a2 ...
B
b1 ...
b2 ...
C
c1 b1
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
2004 06:22
To: [EMAIL PROTECTED]
Subject: Simple 1:n mapping question
Hi Everybody,
I have a 1:n relationship between
Person Application tables.
I have Person Application valueobjects
representing the tables respectively.
I want to search on the join of these
tables with criteria pertaining
Hi Everybody,
I have a 1:n relationship between
Person Application tables.
I have Person Application valueobjects
representing the tables respectively.
I want to search on the join of these
tables with criteria pertaining to both
tables.
In the Person value object I have a
Collection
Downloads/Documents (i.e decomposed M:N) but you can keep the
existing table stuff.
Others may have better ideas :)
Good Luck,
Rob :)
-Original Message-
From: Patrick Scheuerer [mailto:[EMAIL PROTECTED]
Sent: Friday, 2 January 2004 2:56 p.m.
To: OJB Users List
Subject: Mapping
Hi,
Please see the attached image of my data model for reference (I'm sorry for the
attachment but it's kind of complicated to describe the scenario otherwise. A
picture says more than a thousand words :-) ).
How do I map the relationship between pal_model - download and pal_model - document?
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
Hi,
I've got a 1:n mapping from table A to table B. But the foreign key field of
table A is not it's primary key. I can't find how to tell OJB to use another
field to join table B.
Thanks for help, Norbert.
-
To unsubscribe,
]
Envoyé : jeudi 27 novembre 2003 16:57
À : [EMAIL PROTECTED]
Objet : Mapping question
Hi,
I've got a 1:n mapping from table A to table B. But the foreign key field of
table A is not it's primary key. I can't find how to tell OJB to use another
field to join table B.
Thanks for help, Norbert
Natural Resources Research Center/USGS
[EMAIL PROTECTED]
(970)226-9291
List-Id: OJB Users List ojb-user.db.apache.org
Subject: o/r mapping question
Date: Thu, 30 Oct 2003 21:14:16 -0500
Thread-Topic: o/r mapping question
From: Robert J Celestino [EMAIL PROTECTED]
To: OJB Users List [EMAIL PROTECTED
Still no clue on what is wrong with this.
- Original Message -
From: [EMAIL PROTECTED]
Date: Friday, October 31, 2003 3:19 pm
Subject: Re: RE: Another silly newbie mapping question
Thank you Robert, but Offers are permanent pieces of information
in the database whereas OrderItems
and I want to
understand this just for the sake of understanding.
JohnE
- Original Message -
From: [EMAIL PROTECTED]
Date: Sunday, November 2, 2003 5:24 pm
Subject: Re: RE: Another silly newbie mapping question
Still no clue on what is wrong with this.
- Original Message
I have worked out much harder mapping problems then this, but for some reason I am
still a bit new on this stuff and making no headway. I would appreciate a more
seasoned glance.
Problem: OfferVO is not being materialized after succesfully retrieving the
Collection of OrderItemVO by using
implementation.
From the archives it seemed ok to map multiple primary keys to one primary key.
- Original Message -
From: [EMAIL PROTECTED]
Date: Friday, October 31, 2003 2:49 am
Subject: Re: Another silly newbie mapping question
Still no luck. I noticed that my primary key order might
silly newbie mapping question
I give up for the night. BTW I am using Release Candidate 2.
Not sure it matters, but I am using
PersistentFieldClass=org.apache.ojb.broker.metadata.fieldacc
ess.PersistentNestedFieldMaxPerformanceImpl so that I could
use '-' Single Table
plum out of them.
JohnE
- Original Message -
From: Robert J Celestino [EMAIL PROTECTED]
Date: Friday, October 31, 2003 10:11 am
Subject: RE: Another silly newbie mapping question
Hello John,
I think you want auto-update=true instead of false here:
reference
Hello all,
I am stumped by what is posibly a very simple mapping problem.
Consider something like this
Person is stored in the person table
Person has-a AddressGroup. AddressGroup is not stored in the DB
AddressGroup has a list of Addresses
Address is stored in
Message-
From: Robert J Celestino [mailto:[EMAIL PROTECTED]
Sent: Thursday, October 30, 2003 8:14 PM
To: OJB Users List
Subject: o/r mapping question
Hello all,
I am stumped by what is posibly a very simple mapping problem.
Consider something like this
Person is stored in the person
Solution 1:
Implement AddressGroup as a custom collection (implementing Manageable
Collection) used to hold the address instances. This muddies the domain
model a bit as AddressGroup then needs to know about
ManageableCollection.
Solution 2:
Map two classes to the same table (I used an
Hi Brian,
I have fixed the OTM bug (M:N relations wasn't updated).
Thanks for detailed bug report.
Regards,
Oleg
On Tuesday 14 October 2003 14:16, Brian McCallister wrote:
On Tuesday, October 14, 2003, at 09:33 AM, [EMAIL PROTECTED] wrote:
Hej Brian,
-Original Message-
From:
I have mixed and matched the value, but it hasn't mattered. I had
thought it might care so I tried various combinations. It in this vase
being a nebulous entity who thwarts my plans, as to my knowledge
neither OJB nor Postgres care about case of table names.
Will experiment on that one further
Hej Brian,
-Original Message-
From: Brian McCallister [mailto:[EMAIL PROTECTED]
I have mixed and matched the value, but it hasn't mattered. I had
thought it might care so I tried various combinations. It in
this vase
being a nebulous entity who thwarts my plans, as to my
On Tuesday, October 14, 2003, at 09:33 AM, [EMAIL PROTECTED] wrote:
Hej Brian,
-Original Message-
From: Brian McCallister [mailto:[EMAIL PROTECTED]
I have mixed and matched the value, but it hasn't mattered. I had
thought it might care so I tried various combinations. It in
this vase
Hello Brian,
-Original Message-
From: Brian McCallister [mailto:[EMAIL PROTECTED]
Which concrete class is instantiated
for the list field?
Default - I don't specify anything so should be a Vector.
I bet this is the problem. You'd probably better
use one of the managed
On Tuesday, October 14, 2003, at 10:29 AM, [EMAIL PROTECTED] wrote:
I bet this is the problem. You'd probably better
use one of the managed collections. Could you please
check by outputting xxx.getClass().getName() somewhere?
On retrieved collections it uses:
Follow up.. Changing the OTM Test to use PB style QueryByCriteria also
fails:
public void testRequestFriendOTMTwo() throws Exception
{
OTMConnection conn =
SimpleKit.getInstance().acquireConnection(PersistenceBrokerFactory.getDe
faultKey());
I am having problems getting a class to properly persist collections of
instances of the same class (see configs later in the email). Using the
M:N mapping seems to be the way to do this, but it isn't actually
working. If the relations exist in the database the data loads fine,
however it
Note that the package names *do* match in the actual code - Changed the
one in place in the email and not the other =)
-Brian
On Sunday, October 12, 2003, at 10:38 PM, Brian McCallister wrote:
I am having problems getting a class to properly persist collections
of instances of the same class
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