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By: a guest on Jun 17th, 2012  |  syntax: None  |  size: 0.33 KB  |  hits: 17  |  expires: Never
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  1. help with datastore query
  2. **playlist**
  3. songs = db.ListProperty(db.Key)
  4.  
  5. **Song**
  6. artist = db.ReferenceProperty(Artist,collection_name='songs')
  7.  
  8. **Artist**
  9. Key Name = john-lennon
  10.        
  11. songs = GqlQuery('SELECT __key__ FROM song WHERE artist = :1', 'john-lennon')
  12. playlists = GqlQuery('SELECT * FROM playlist WHERE songs IN :1', songs)
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