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https://issues.jboss.org/browse/FORGE-974?page=com.atlassian.jira.plugin....
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Vineet Reynolds commented on FORGE-974:
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Some technical details:
Collection members of an entity are displayed in a datatable. When an item is deleted from
this table, it is deleted from the underlying collection through an EL expression:
{noformat}
#{_collection.remove(_item)}
{noformat}
This EL expression is not aware of the participation of the collection in a bi-directional
relationship. When the composing entity is merged back into the persistence context, any
deletions of instances from the collection are not recorded since they need to be done on
both sides.
Faces scaffolding does not correctly update collection members
involved in bi-directional relationships when saving an edited entity
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Key: FORGE-974
URL:
https://issues.jboss.org/browse/FORGE-974
Project: Forge
Issue Type: Bug
Components: Scaffold
Affects Versions: 1.3.1.Final
Reporter: Vineet Reynolds
Assignee: Vineet Reynolds
The generated scaffold does not contain any logic to update collection properties of a
JPA entity. This results in incorrect behavior when the collection is part of a
bi-directional relationship in JPA.
This is because no logic exists to remove both sides of the relationship when an entity
instance is removed from the collection. The result of this absence in logic is that
removal of entities from collection properties do not succeed. Upon save, the collection
returns to it's previous state.
Addition of members to the collection property are however performed correctly. Since the
Faces scaffold does not allow updates to properties of the the individual members in the
collection, no other issue is observed, except for the inability to update the collection
state correctly.
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