[Middlegen-user] VALUEOBJECT_REFACTORING_BRANCH and relations

[Markus Härnvi]

Hi!

I'm trying out Middlegen and the Value Object branch. I can't find any methods
in the entity facade for adding child objects. I read in JIRA
(http://jira.codehaus.org/secure/ViewIssue.jspa?key=MIDDLEGEN-3) that middlegen
currently can't handle relations automatically.

But how do I add/list/remove related entities through the facade in it's current
form? Lets say I have a Person object that has a 1..* relation to some Address
objects.

Thanks in advance!

/Markus

[Eivind Waaler]

As far as I remember, we made the update methods in the facade take the
light version of the value object. That means to update relationships you
have to update the actual id on the light value object and run update with
the facade:

AddressValue address =3D addressFacade.findByPrimaryKey(aId);
PersonValue person =3D personFacade.findByPrimaryKey(pId);
person.setAddressIdFk(address.getPrimaryKey());
person =3D personFacade.update(person);

Something like that.. Kind of unconvenient, but at least this will work.

=2Eeivind

=20
Hi!
=20
I'm trying out Middlegen and the Value Object branch. I can't find any me=

thods

in the entity facade for adding child objects. I read in JIRA
(http://jira.codehaus.org/secure/ViewIssue.jspa?key=3DMIDDLEGEN-3) that m=

iddlegen

currently can't handle relations automatically.
=20
But how do I add/list/remove related entities through the facade in it's =

current

form? Lets say I have a Person object that has a 1..* relation to some Ad=

dress

objects.
=20
Thanks in advance!
=20
/Markus
=20
=20
=20
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[Markus Härnvi]

Hi!

I got the 1..* working. Thanks.

LogMessageLightValue logValue =
logFacade.create("Foo");
logDetail = new LogDetailLightValue();
logDetail.setLogid(logValue.getLogid());
logDetail = detailFacade.create(logDetail);

Now I have a many-to-many relation between two entity beans (Group and Node). I
am using a mapping table to handle the relation. Middlegen finds the mapping
table and everything seems OK.

I can get the related beans through the facade, if I work with pre-existing data
in the tables:

Collection groups = groupFacade.findByPrimaryKey(pk);
...
NodeLightValue [] nodes = group.getNodes();

But how do I create new relations? I can add NodeLightValue to GroupValue:

groupValue.addNode(node);
groupFacade.update(groupValue);

But the update() method in the facade only take GroupLightValue, and the light
VO doesn't contain the relations.

/Markus

Post by Eivind Waaler
As far as I remember, we made the update methods in the facade take the
light version of the value object. That means to update relationships you
have to update the actual id on the light value object and run update with
AddressValue address = addressFacade.findByPrimaryKey(aId);
PersonValue person = personFacade.findByPrimaryKey(pId);
person.setAddressIdFk(address.getPrimaryKey());
person = personFacade.update(person);
Something like that.. Kind of unconvenient, but at least this will work.
.eivind

Post by Markus Härnvi
Hi!
I'm trying out Middlegen and the Value Object branch. I can't find any

methods

Post by Markus Härnvi
in the entity facade for adding child objects. I read in JIRA
(http://jira.codehaus.org/secure/ViewIssue.jspa?key=MIDDLEGEN-3) that

middlegen

Post by Markus Härnvi
currently can't handle relations automatically.
But how do I add/list/remove related entities through the facade in it's

current

Post by Markus Härnvi
form? Lets say I have a Person object that has a 1..* relation to some

Address

Post by Markus Härnvi
objects.
Thanks in advance!
/Markus

[Eivind Waaler]

Hmm, good point.

I think the only way to do it with the current version is to reverse it:

node.setGroupId(groupId);
nodeFacade.update(node);

Don't if this would work for your example?

I suggest you log this as a bug in the JIRA issue tracker. It has a
separate version called 2.0-beta-2-VALUEOBJECT_REFACTORING_BRANCH:

http://jira.codehaus.org/secure/BrowseProject.jspa?id=3D10110

=2Eeivind

=20
Hi!
=20
I got the 1..* working. Thanks.=20
=20
LogMessageLightValue logValue =3D
logFacade.create("Foo");
logDetail =3D new LogDetailLightValue();
logDetail.setLogid(logValue.getLogid());
logDetail =3D detailFacade.create(logDetail);
=20
Now I have a many-to-many relation between two entity beans (Group and No=

de). I

am using a mapping table to handle the relation. Middlegen finds the mapp=

ing

table and everything seems OK.
=20
I can get the related beans through the facade, if I work with pre-existi=

ng data

=20
Collection groups =3D groupFacade.findByPrimaryKey(pk);
...
NodeLightValue [] nodes =3D group.getNodes();
=20
But how do I create new relations? I can add NodeLightValue to GroupValue=

:=20

=20
groupValue.addNode(node);=20
groupFacade.update(groupValue);
=20
But the update() method in the facade only take GroupLightValue, and the =

light

VO doesn't contain the relations.=20
=20
/Markus
=20

Post by Eivind Waaler
As far as I remember, we made the update methods in the facade take the
light version of the value object. That means to update relationships y=

ou

Post by Eivind Waaler
have to update the actual id on the light value object and run update w=

ith

Post by Eivind Waaler
=20
AddressValue address =3D addressFacade.findByPrimaryKey(aId);
PersonValue person =3D personFacade.findByPrimaryKey(pId);
person.setAddressIdFk(address.getPrimaryKey());
person =3D personFacade.update(person);
=20
Something like that.. Kind of unconvenient, but at least this will work=

=2E

Post by Eivind Waaler
=20
.eivind
=20
=20

=20
Hi!
=20
I'm trying out Middlegen and the Value Object branch. I can't find an=

y

Post by Eivind Waaler
methods

in the entity facade for adding child objects. I read in JIRA
(http://jira.codehaus.org/secure/ViewIssue.jspa?key=3DMIDDLEGEN-3) th=

at

Post by Eivind Waaler
middlegen

currently can't handle relations automatically.
=20
But how do I add/list/remove related entities through the facade in i=

t's

Post by Eivind Waaler
current

form? Lets say I have a Person object that has a 1..* relation to som=

e

Post by Eivind Waaler
Address

objects.
=20
Thanks in advance!
=20
/Markus

=20
=20
=20
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This sf.net email is sponsored by:ThinkGeek
Welcome to geek heaven.
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_______________________________________________
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=20