On May 18, 2009, at 8:06 PM, Michael Bayer wrote:

>
> if you want to make a chained join like that, use just primaryjoin(),
> dont use "secondary", and set viewonly=True.

I might be off on the "dont use secondary" advice.   if you do use  
"secondary", "secondary" is the "middle" table, so in this case it  
seems like it would be "tags_table" and the target would be  
"processed_tag_table".

> As an alternative to the above approach, you can also try using
> traditional relations between each class and use the association proxy
> to simplify access from one end to the other.

this advice stlll holds though (as does use viewonly=True).


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