Hi Michael,
You put me on the track.
After investigation, I would not define the hashcode well.
I had:
override def hashCode(): Int = {
if (_id == null)
0
else
_id.hashCode()
}
Replaced by:
override def hashCode(): Int = {
if (_id == null)
System.identityHashCode(this)
else
_id.hashCode()
}
I put *0* since I thought that there would never be a case where the
business `_id` would be null, since i use @fetch so when I retrieve an
attached entity, I expected to be fully complete.
That was not the case :) I imagine that the fetch process firstly
initializes the list only with the node id (not the business id of course),
explaining why two elements with 0 as hashcode would be entered in
collision, thus losing one. AND THEN completes them with all the fetched
attributes.
Thanks a lot,
Michael
On Friday, April 18, 2014 6:42:03 AM UTC+2, Michael Hunger wrote:
>
> Perhaps two are the same and so reduced to one in the set
>
> What happens if you add distinct to your cypher query?
>
> Sent from mobile device
>
> Am 18.04.2014 um 03:30 schrieb Michael Azerhad
> <[email protected]<javascript:>
> >:
>
> Hi,
>
> I know that SDN 3.X.X is not full tested yet but I come across this
> potential bug, and I would like to know if it is a "known" one:
>
> I have an acceptance test written using Specs2 (using a pretty DSL)
> containing this:
>
> meetingRepository.findAllParticipants(meetingId) must have size 3
> //works,
> asserting 3, since it's a custom query I wrote in the meetingRepository to
> prove that the second line doesn't work
>
> meetingRepository.findById(meetingId).participants must have size 3 //
> instead of asserting 3, it always displays "containing 2, not 3"
>
> My custom query is:
>
> @Query("MATCH (m:Meeting {_id: {0}})<-[:PARTICIPATES]-(participant)
> return participant")
> def findAllParticipants(meetingId: String): EndResult[Participant]
>
>
> The bug therefore concerns the @Fetch annotation that is above the
> Participants Set, in the class Meeting:
>
> @org.springframework.data.neo4j.annotation.Fetch
> @org.springframework.data.neo4j.annotation.RelatedTo(`type` =
> "PARTICIPATES", direction = Direction.INCOMING)
> var participants: java.util.Set[Participant] = new util.HashSet[
> Participant]
>
> I don't figure out why it doesn't return all the participants but only 2.
> I even test with the Rest mode database, to be sure to see the 3
> participants saved, just before the line "meetingRepository.findById(
> meetingId).participants must have size 3" is executed. And there are the
> 3 elements as expected in the rest database.
>
> Is it possible to check it with a possible SDN unit test ? If there is
> one concerning the fetch annotation of course.
>
> Thanks a lot,
>
> Michael
>
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