rails4_has_one

#assuming schema is
# table turbines
#  id integer
#  turbine_type_id integer

# table turbine_types
#  id integer
#  name string

class Turbine < ActiveRecord::Base
  belongs_to :turbine_type # fk is in turbines, so belongs_to belongs here.
end


class TurbineType < ActiveRecord::Base
  has_many :turbines
end

show.html.erb
<p id="notice"><%= notice %></p>

<p>
  <strong>Name:</strong>
  <%= @turbine.name %>
</p>
<p>
  <strong>Type:</strong>
  <%= @turbine.turbine_type.name %>
</p>

<%= link_to 'Edit', edit_turbine_path(@turbine) %> |
<%= link_to 'Back', turbines_path %>