Ruby on Rails

Hi,

I am new to RoR and have been pulling my hair out trying to figure out
associations.

Lets say I have 2 tables: vehicles and vehicle_types. ONE vehicle HAS
ONE vehicle_type. Therefore, in my opinion, vehicle_type belongs_to
vehicle.

Hence, vehicle_types will contain the vehicle foreign key. To me this is
already weird. I would like vehicle_types to be a table containing a
column that lists types of vehicles- "truck", "car", "bus", etc. It does
not need to know what vehicle is associated with it. The vehicles table
needs to know what vehicle_type it is.

I would like to use the vehicle_types table to populate a Select Menu on
a form. If I create the associations as suggested by RoR, with the
foreign key going on the belongs_to table (vehicle_types), the Select
Menu would be populated with duplicate vehicle_types. EG:

vehicle_id vehicle_type_id type
1 1 car
2 2 truck
3 3 car

Does this make sense?

Like I said I have spent days reading over the associations again and
again but I just can't figure it out. Any help would be greatly
appreciated.

Thanks.

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