Ruby on Rails

Heinz Strunk wrote:
> Hello,
>
> I've been googling for about two hours already but not successful yet so
> I hope you guys can help me out.
>
> I need some kind of n:m polymorphic relation like this:
> building_types: living, shops
> block_types: residential, commercial
>
> activity_types: act1, act2
>
> So now I need a connection table e.g. activity_scope so I can for
> example allow
> act1 only for living and residential and act2 for commercial and shops
>
> Any ideas?

This doesn't sound like a polymorphic relationship (at least not in
terms of tables). Are living, shop, residential and commercial each
models, or just attribute values for a building model (living or shop)
and a block model (residential or commercial)?

It feels like this is more just a case of a complex validation where you
need to check the building type of a related building and the block_type
of a related block according to the activity type.

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