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? -- http://www.lesculturelles.net -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
