elemMatch of Class Criteria fails to build special cirteria [DATAMONGO-1068]

[spring-projects-issues]

Wizard Zhang opened DATAMONGO-1068 and commented

There is an entity like this:

public class Room {
     private String name;
     private List<Date> occupied;
}

I need to issue a criteria to fetch all documents in which none of elements of occupied falls into a specified date range. The query JSON is:

{
     occupied : {
          $not : {
               $elemMatch : {
                        $gte : start,
                        $lte : end
               }
          }
     }
}

Then, I tried on

Criteria c1 = new Criteria().gte(start).lte(end);
Criteria c = Criteria.where("occupied").not().elemMatch(c1);

But the serialization to JSON for c is:

	
{
	occupied : {
		$not : {
			$elemMatch : {
			}
		}
	}
}

It seems that c1 will be explained to empty Map by invoking elemMatch(Criteria) because I haven't assign a key to it. But really no key I can assign to it

---

Affects: 1.5.4 (Dijkstra SR4)

Referenced from: pull request #232

Backported to: 1.6.1 (Evans SR1), 1.5.5 (Dijkstra SR5)

[spring-projects-issues]

Thomas Darimont commented

Fixed in master. Back ported to 1.6.x, 1.5.x