Rails - Apr 2006 - parent - child help (RoR & MySQL)

I''m having some trouble getting a parent-child relationship working. 
I''ve got 5 tables, 1 being the main table and 4 being lookup tables for
the main.  in the chart below, each of the xxxx_id fields has a 
corresponding table.  I would like to be able to show just the result of 
the relationship.  this is also outlined below.

table_example:

[id_of_object]    object_id    region_id    state_id    vendor_id 
other_info
                      |            |           |            |
                      |            |           |            |
                      |            |           |            |
                     /              \          |           /
                    /                --------- | ----------
                   /                          \|/
                  id   object             same as object

what should show on display:

(id_of_object)    object    region    state    vendor    other_info


Thanks!

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