First start at Bike Model

app/models/bike.rb

@@ -0,0 +1,29 @@
+class Bike < ActiveRecord::Base
+  attr_accessible :serial_number, :bike_brand_id, :bike_model_id, :color, :bike_style_id, :seat_tube_height,
+    :top_tube_length, :wheel_size, :value, :bike_condition_id, :bike_status_id
+
+  has_one :owner, :class_name => 'User'
+  has_one :brand, :class_name => 'BikeBrand'
+  has_one :model, :class_name => 'BikeModel'
+  has_one :style, :class_name => 'BikeStyle'
+  has_one :condition, :class_name => 'BikeCondition'
+  has_one :status, :class_name => 'BikeStatus'
+
+  validates :serial_number, :uniqueness => true, :length => { :minimum => 3 }
+  validates :bike_brand_id, :presence => true
+  validates :bike_model_id, :presence => true
+  validates :color, :presence => true
+  validates :bike_style_id, :presence => true
+  validates :seat_tube_height, :presence => true
+  validates :top_tube_length, :presence => true
+  validates :wheel_size, :presence => true
+  #validates :value, :presence => true
+  validates :bike_condition_id, :presence => true
+  validates :bike_status_id, :presence => true
+
+  self.per_page = 15
+
+  def to_s
+    "#{brand} - #{model} - #{style}"
+  end
+end