Dzmitry Kazimirchyk created CAY-1802:
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Summary: Records present in multiple prefetch paths are not merged
correctly into final result
Key: CAY-1802
URL: https://issues.apache.org/jira/browse/CAY-1802
Project: Cayenne
Issue Type: Bug
Components: Core Library
Affects Versions: 3.1B2
Reporter: Dzmitry Kazimirchyk
Attachments: CAY-1802-test.patch
If same records getting prefetched through multiple prefetch paths, the final
result will content corrupted records with relationships set to null. Example:
Paintings are present in one prefetch path:
SelectQuery q = new SelectQuery(Artist.class);
q.addPrefetch(Artist.PAINTING_ARRAY_PROPERTY);
q.addPrefetch(Artist.PAINTING_ARRAY_PROPERTY + "." +
Painting.TO_PAINTING_INFO_PROPERTY);
artist.getPaintingArray().get(0).getPaintingInfo() will contain correct non
null PaintingInfo record.
But if paintings are present in multiple prefetch paths:
SelectQuery q = new SelectQuery(Artist.class);
q.addPrefetch(Artist.PAINTING_ARRAY_PROPERTY);
q.addPrefetch(Artist.PAINTING_ARRAY_PROPERTY + "." +
Painting.TO_PAINTING_INFO_PROPERTY);
q.addPrefetch(Artist.ARTIST_EXHIBIT_ARRAY_PROPERTY);
q.addPrefetch(Artist.ARTIST_EXHIBIT_ARRAY_PROPERTY + "." +
ArtistExhibit.TO_EXHIBIT_PROPERTY);
q.addPrefetch(Artist.ARTIST_EXHIBIT_ARRAY_PROPERTY + "." +
ArtistExhibit.TO_EXHIBIT_PROPERTY + "." + Exhibit.TO_GALLERY_PROPERTY);
q.addPrefetch(Artist.ARTIST_EXHIBIT_ARRAY_PROPERTY + "." +
ArtistExhibit.TO_EXHIBIT_PROPERTY + "." + Exhibit.TO_GALLERY_PROPERTY + "." +
Gallery.PAINTING_ARRAY_PROPERTY);
artist.getPaintingArray().get(0).getPaintingInfo() will return null even if
there is PaintingInfo associated with painting.
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