i had not thought of a polymorphic association.
works good and does what i needed.


Ar Chron wrote:
> Gone Sail wrote:
>> right this sounds like what i need to do. so your association tables (AB 
>> and AC) have their own unique ids? Xlink is the polymorphic link from AB 
>> and AC to the X table elements? so the Xlink table will have an 
>> xlinkable type and id along with the X table id? thanks.
> 
> Yup.
> 
> AB or AC would have:
>   id
>   a_id
>   b_id or c_id
>   plus other fields
> 
> xlink would have:
>   id (the xlink record id)
>   x_id (the id of the related X record)
>   xlinkable_id (this is the id of the AB/AC join record)
>   xlinkable_type (this is the class name "AB"/"AC" of the join record)

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