Re: many-to-many relationship

On Tue, Oct 07, 2008 at 05:16:39PM -0700, Steve Midgley wrote:
>
> I think the relationship tables method works pretty well but I have
> another suggestion. You could store the Foreign table name within image
> table as well as the Foreign key.
>
> |id|image_url|f_table|f_key
> |1 |url......|person |1234
> |2 |url2.....|event |5678
>
> I think this is called a "polymorphic join" but I could be wrong about
> that. I'd guess you could construct a rule or trigger to validate the
> foreign key data on insert/update but that's out of my skill area.

Hi Steve,

So in your solution the f_table column is just text which needs to be
validated by a custom trigger?

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