On Sep 9, 2008, at 7:27 PM, GustaV wrote:
>
> t4 = session.query(Tile).get(4)
> print t4.neighbors[0]._data
>
>
> will print None
you have to adjust the other mapping appropriately:
related_tiles = mapper(Tile, tile_alias, non_primary=True, properties={
'_data':tile_alias.c.data
})
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