[Hibernate-JIRA] Created: (HBX-1034) Need a way to have a "native-if-not-assigned" IdentifierGenerator
10:41 p.m.
Need a way to have a "native-if-not-assigned" IdentifierGenerator
-----------------------------------------------------------------
Key: HBX-1034
URL: http://opensource.atlassian.com/projects/hibernate/browse/HBX-1034
Project: Hibernate Tools
Issue Type: New Feature
Reporter: Paul Shemansky
Attachments: hibernate-native-or-assigned-patch.diff
NOTE: I believe I have explored every documented possibility in achieving the desired
functionality. If I have misused Hibernate, the forum, or Google, I humbly apologize and
stand to be corrected.
With that being said, I believe this may be desired:
--------------------------------------------------------------------
By setting the Hibernate configuration's primary key column to use a
"native" implementation, Hibernate ALWAYS generates the entity's id when a
save() is being called. There is no way to "override" the generated id.
The attached patch creates an IdentityGenerator which allows a programmer to override the
"generated" id, with an "assigned" id at runtime simply by setting the
primary key property.
The patch also changes the IdentifierGeneratorFactory to allow the short-name selection of
the generator via a configuration file.
Furthermore, the English documentation is patched to describe the generator, accordingly.
Possibly related issues and reference material:
The documentation does not seem to provide a solution for a native-if-not-assigned
generator; you seem to only have one, or the other:
http://www.hibernate.org/hib_docs/reference/en/html/mapping.html#mapping-...
A scenario which describes a typical use case that warrants the proposed new feature:
http://forum.hibernate.org/viewtopic.php?t=982560&highlight=native+id...
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9:03 a.m.
New subject: [Hibernate-JIRA] Closed: (HBX-1034) Need a way to have a "native-if-not-assigned" IdentifierGenerator
[
http://opensource.atlassian.com/projects/hibernate/browse/HBX-1034?page=c...
]
Max Rydahl Andersen closed HBX-1034.
------------------------------------
Resolution: Rejected
Two things:
1) This is not for Hibernate Tools but Hibernate Core
2) This is exactly what custom id generators are for; putting it in as a default provided
id generator would be bad since you cannot gurantee id overlap
3) have you looked at session.replicate() ?
4) you could put this on the wiki to share it with others.
Need a way to have a "native-if-not-assigned"
IdentifierGenerator
-----------------------------------------------------------------
Key: HBX-1034
URL: http://opensource.atlassian.com/projects/hibernate/browse/HBX-1034
Project: Hibernate Tools
Issue Type: New Feature
Reporter: Paul Shemansky
Attachments: hibernate-native-or-assigned-patch.diff
Original Estimate: 10 minutes
Remaining Estimate: 10 minutes
NOTE: I believe I have explored every documented possibility in achieving the desired
functionality. If I have misused Hibernate, the forum, or Google, I humbly apologize and
stand to be corrected.
With that being said, I believe this may be desired:
--------------------------------------------------------------------
By setting the Hibernate configuration's primary key column to use a
"native" implementation, Hibernate ALWAYS generates the entity's id when a
save() is being called. There is no way to "override" the generated id.
The attached patch creates an IdentityGenerator which allows a programmer to override the
"generated" id, with an "assigned" id at runtime simply by setting the
primary key property.
The patch also changes the IdentifierGeneratorFactory to allow the short-name selection
of the generator via a configuration file.
Furthermore, the English documentation is patched to describe the generator,
accordingly.
Possibly related issues and reference material:
The documentation does not seem to provide a solution for a native-if-not-assigned
generator; you seem to only have one, or the other:
http://www.hibernate.org/hib_docs/reference/en/html/mapping.html#mapping-...
A scenario which describes a typical use case that warrants the proposed new feature:
http://forum.hibernate.org/viewtopic.php?t=982560&highlight=native+id...
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6:55 p.m.
New subject: [Hibernate-JIRA] Commented: (HBX-1034) Need a way to have a "native-if-not-assigned" IdentifierGenerator
[
http://opensource.atlassian.com/projects/hibernate/browse/HBX-1034?page=c...
]
radhakrishna commented on HBX-1034:
-----------------------------------
-I wanted to override the default ID hibernate generates when saving using session.save()
method, my mapping was defined as
<id name="Id" type="java.lang.Long">
<column name="ID" precision="11" scale="0"
/>
<generator class="increment" />
</id>
-and saving as
obj.setId(myCustomLongId);
org.hibernate.Session.save(obj)
created a huge problem as save would not even throw an exception that the ID in the object
being persisted will be overridden by the PK-generator defined in the entity mapping file.
SaveOrUpdate(), however, if the PK is already defined and if there is no persisted record
in the database with this ID would surely throw an exception. Shouldn't save() also
throw an exception when you change the user's ID while persisting a so called detached
instance?
Anyways, I am successfully able to use session.replicate(obj, ReplicationMode.EXCEPTION)
because I do know that the object does not exist in the database. What I do not understand
is
"This operation cascades to associated instances if the association is mapped with
cascade="replicate"."
Although I did not try saving (using replicate) an entity with an associated instance such
as a child collection each with it's own custom ID, I am curious what would happen in
such a case, because I am not sure where I should be mentioning the
cascade="replicate" as it is defined as cascade="all-delete-orphan"
and I would want to use it.
public void replicate(Object object,
ReplicationMode replicationMode)
throws HibernateException
Persist the state of the given detached instance, reusing the current identifier
value. This operation cascades to associated instances if the association is mapped with
cascade="replicate".
Parameters:
object - a detached instance of a persistent class
Throws:
HibernateException
Need a way to have a "native-if-not-assigned"
IdentifierGenerator
-----------------------------------------------------------------
Key: HBX-1034
URL: http://opensource.atlassian.com/projects/hibernate/browse/HBX-1034
Project: Hibernate Tools
Issue Type: New Feature
Reporter: Paul Shemansky
Attachments: hibernate-native-or-assigned-patch.diff
Original Estimate: 10 minutes
Remaining Estimate: 10 minutes
NOTE: I believe I have explored every documented possibility in achieving the desired
functionality. If I have misused Hibernate, the forum, or Google, I humbly apologize and
stand to be corrected.
With that being said, I believe this may be desired:
--------------------------------------------------------------------
By setting the Hibernate configuration's primary key column to use a
"native" implementation, Hibernate ALWAYS generates the entity's id when a
save() is being called. There is no way to "override" the generated id.
The attached patch creates an IdentityGenerator which allows a programmer to override the
"generated" id, with an "assigned" id at runtime simply by setting the
primary key property.
The patch also changes the IdentifierGeneratorFactory to allow the short-name selection
of the generator via a configuration file.
Furthermore, the English documentation is patched to describe the generator,
accordingly.
Possibly related issues and reference material:
The documentation does not seem to provide a solution for a native-if-not-assigned
generator; you seem to only have one, or the other:
http://www.hibernate.org/hib_docs/reference/en/html/mapping.html#mapping-...
A scenario which describes a typical use case that warrants the proposed new feature:
http://forum.hibernate.org/viewtopic.php?t=982560&highlight=native+id...
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hibernate-issues@lists.jboss.org
2 comments
3 participants
participants (3)
-
Max Rydahl Andersen (JIRA) -
Paul Shemansky (JIRA)
-
radhakrishna (JIRA)