The query certainly looks fishy. I suspect this may be related to
this issue:
http://issues.apache.org/cayenne/browse/CAY-447
Now the question is whether your relationship problem is also related
to that. I guess it would help if you post your DataMap XML subset
containing the 4 entities in question.
Andrus
On Jun 19, 2006, at 8:32 PM, Arturo Perez wrote:
Andrus Adamchik <andrus <at> objectstyle.org> writes:
On Jun 19, 2006, at 5:13 PM, Arturo Perez wrote:
Iterator i = articleCategory.getArticles().iterator();
while (i.hasNext()) {
ArticleCategoryLink acl = (ArticleCategoryLink)i.next();
ArticleMeta am = acl.getLatestArticle();
Article a = am.getArticle();
}
The article is null but if I run an Expression I get what I expect:
Expression exp =
ExpressionFactory.matchExp("activeArticle.categories.category",
category);
exp = exp.andExp(
Expression.fromString("latestArticle.article
activeArticle.article"));
The last expression looks strange (I am surprised it compiles). What
SQL is generated for the query?
Andrus
It looks like the equal sign went away. It should be
"latestArticle.article = activeArticle.article"
That last expression is intended to limit results to the current
articles.
Everything has backissues that should be ignored for the above.
The SQL
is a 4-way join:
2006-06-19 12:25:21,249 [http-8316-Processor24] WARN
org.objectstyle.cayenne.access.QueryLogger- SELECT DISTINCT
t0.ARTICLE_ID,
t0.ARTICLE_META_ID FROM ARTICLE t0, ARTICLE_META t1,
ARTICLE_CATEGORY_LINK t2, ARTICLE_META t3 WHERE t0.ARTICLE_ID =
t1.ACTIVE_ARTICLE_ID AND t1.ARTICLE_META_ID = t2.ARTICLE_META_ID AND
t0.ARTICLE_META_ID = t3.ARTICLE_META_ID AND ((t2.CATEGORY_ID = ?) AND
(t1.ACTIVE_ARTICLE_ID = t1.ACTIVE_ARTICLE_ID)) [bind: 1042]
2006-06-19 12:25:23,608 [http-8316-Processor24] WARN
org.objectstyle.cayenne.access.QueryLogger- === returned 91 rows.
- took
2359 ms.
I suppose I should change the above to a matchInExp to cut down on
the join
but I'm more concerned about the null. Although, looking at that
SQL, the
last AND clause seems incorrect.
-arturo
