you should not use the name of a relationship in a user alias, in the best case it will have no effect ;)
when you do not define your own alias ojb uses the name of the relationship as 'internal' alias.
i'll have a look at your problem using an empty criteria.
hth jakob
Michael Hart wrote:
In response to myself:
Criteria main_crit = new Criteria();
main_crit.setAlias("project");
Criteria persons_crit = new Criteria();
persons_crit.setAlias("persons");
persons_crit.addEqualTo("persons.id","2");
main_crit.addAndCriteria(persons_crit);
Query query = new QueryByCriteria(Project.class, main_crit);
Generates this:
SELECT A0.TITLE,A0.DESCRIPTION,A0.ID
FROM PROJECT A0
INNER JOIN PERSON_PROJECT A1 ON A0.ID=A1.PROJECT_ID
INNER JOIN PERSON A2 ON A1.PERSON_ID=A2.ID
WHERE A4.ID = 2
I've just played some more, and putting the main_crit.setAlias at the end of the code block works fine (this is true for the other examples as well):
Criteria main_crit = new Criteria();
Criteria persons_crit = new Criteria();
persons_crit.setAlias("persons");
persons_crit.addEqualTo("persons.id","2");
main_crit.addAndCriteria(persons_crit);
main_crit.setAlias("project");
All works...
So this, plus the other examples, leads me to the following rule-of-thumb:
********* If you are going to set aliases for a particular set of Criteria, you must ensure that the name of the first alias you set reflects the name of a property of the class you wish to query. After that, you may set alias names to be whatever you wish. *********
Does that sound right to you, or have I just generated some really weird test cases?
In any case, I still think it's slightly, slightly buggy... ? (But much better)
Cheers,
Michael
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