It's probably just something I'm not seeing...
I have two entities in this relationship, Article and Account. Accounts
may have votes recorded for articles, and I track this by a many:many
relationship between Articles and the Accounts that voted. (One account
may vote on many Articles, and Articles may have votes from many
accounts.)
The symptom is that the Set annotated with @ManyToMany is always null and
additions to the Set are not persisted.
I have a join table called article_votes which looks like this:
article_object_id | integer | not null
account_object_id | integer | not null
In Article.java, I've annotated articleVotes like this:
@ManyToMany
@JoinTable(name="article_votes", inverseJoinColumns =
[EMAIL PROTECTED](name = "account_object_id", referencedColumnName =
"object_id")})
private Set<Account> articleVotes;
And in Account.java, I've annotated it like this:
@ManyToMany
@JoinTable(name = "article_votes", joinColumns = [EMAIL PROTECTED](name =
"account_object_id")}, inverseJoinColumns = [EMAIL PROTECTED](name =
"article_object_id")})
private Set<Article> articleVotes;
The problem is that when I read an Article from the database, the
articleVotes set is always null. If I create a HashSet and populated
it and persist the change, OpenJPA performs no insert into the join table.
I can't imagine that Many:Many doesn't work, so it's probably some detail
I'm overlooking.
Any thoughts or suggestions?
Nick
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