Also, I get this error: *Can only filter by properties of a sub-object if
the sub-object is embedded.* when I tried to access article while setting a
fitler: query.setFilter("reviewer == reviewerParam && article.status =
articleStatusParam");
What am I missing?
On Sat, Aug 22, 2009 at 6:02 PM, Sam Walker <am.sam.wal...@gmail.com> wrote:
> 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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