In the second model, how will I find all Articles being reviewed by A and B?
The only way I can think of is adding another derived field in Article:
Article {
HashSet<Review> reviews;
HashSet<Reviewer> reviewers; // keys of Reviewers to help the query "find
all articles reviewed by A and B"
HashSet<String> tags;
int status; // derived from all Reviews' statuses.
}
Review {
Article article;
Reviewer reviewer;
int status;
}
Now I should be able to do "reviewers.contains(A.key) and
reviewers.contains(B.key)". Is that the best way?
On Sat, Aug 22, 2009 at 2:02 PM, Sam Walker <am.sam.wal...@gmail.com> wrote:
> Oh sweet, I didn't know that.
>
> That's awesome! Thanks for the quick reply.
>
>
> On Sat, Aug 22, 2009 at 1:51 PM, datanucleus <andy_jeffer...@yahoo.com>wrote:
>
>>
>> > I dont think I can do sth like (I can't access article.tags,
>> article.status
>> > as far as I know, correct?):
>>
>> Of course you can. JDO spec defines JDOQL, using Java syntax.
>>
>> > query.setFilter("reviewer == reviewerParam && status == statusParam &&
>> > article.tags == tagParam && article.status = articleStatusParam");
>>
>> What is "tagParam" ? an element of the hashSet?
>> You can't do "Collection == element" in Java so you can't in JDOQL.
>> You could do "article.tags.contains(tagParam)"
>> >>
>>
>
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