This is a self referential association class Location < ActiveRecordBase has_one :south, :class_name => 'Location', :foreign_key => 'south' end
On Apr 28, 1:58 am, robo <[email protected]> wrote: > ok, I've got a model called Location, the idea being that i have a > bunch of locations aligned to a grid. Each location has a pointer to > it's neighbors, like so > > create_table "locations", :force => true do |t| > t.string "name" > t.text "description" > t.integer "north" > t.integer "northeast" > t.integer "east" > t.integer "southeast" > t.integer "south" > t.integer "southwest" > t.integer "west" > t.integer "northwest" > t.integer "x" > t.integer "y" > t.datetime "created_at" > t.datetime "updated_at" > t.integer "map_id" > end > > whereas all the directions (north, south, east, etc) should all be > references to other locations. > > I know this is probably an easy question, but what kind of > relationship is this, and how would I set it up in my model? like > this? > > has_one :location, :foreign_key => :north > has_one :location, :foreign_key => :northeast > has_one :location, :foreign_key => :east > has_one :location, :foreign_key => :southeast > has_one :location, :foreign_key => :south > has_one :location, :foreign_key => :southwest > has_one :location, :foreign_key => :west > has_one :location, :foreign_key => :northwest > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Talk" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group > athttp://groups.google.com/group/rubyonrails-talk?hl=en. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
