$value = $obj->$thing

Autoload Technique:

thing           -> what it does in english
                => what it does in code
---------------------------------------------------------------------------
col             -> add a 'col' entry, returns value of col
                => OBJ::Add_Col('col','col')

col_id          -> add a 'cols' entry, returns instance from col table
                -> add a 'col_id' entry,  returns value of col_id
                => OBJ::Add_Col(plural('col'),'col_id','col','col_id')
                => OBJ::Add_Col('col_id','col_id')

name_col_id     -> add a 'names' entry, returns instance from col table
                -> add a 'name_col_id' entry,  returns value of name_col_id
                => OBJ::Add_Col(plural('name'),'name_col_id','col','col_id')
                => OBJ::Add_Col('name_col_id','name_col_id')


By-Hand Version:

  Class::add_col($name, $local_col, $foreign_table, $foreign_col)

$foreign_table and $foreign_col are optional. If they are specified then a
has_a relationship is set up for Class, and a has_many relationship is set up
on the foreign class.

Since 'has_one' and 'might_have' and such aren't part of boring SQL, we don't
care about them either and don't mess with them. That sort of thing can be
dealt with some other way, I believe.