Make sure some columns are never null.

db/migrate/20121204220661_acts_as_loggable_bike_actions_migration.rb

@@ -2,7 +2,7 @@ class ActsAsLoggableBikeActionsMigration < ActiveRecord::Migration
 
   def self.up
     create_table :bike_actions do |t|
-      t.string :action, :limit => 128
+      t.string :action, :limit => 128, :null => false
       t.timestamps
     end
   end

db/migrate/20121204220662_acts_as_loggable_user_actions_migration.rb

@@ -2,7 +2,7 @@ class ActsAsLoggableUserActionsMigration < ActiveRecord::Migration
 
   def self.up
     create_table :user_actions do |t|
-      t.string :action, :limit => 128
+      t.string :action, :limit => 128, :null => false
       t.timestamps
     end
   end

db/migrate/20121204220663_acts_as_loggable_transaction_actions_migration.rb

@@ -2,7 +2,7 @@ class ActsAsLoggableTransactionActionsMigration < ActiveRecord::Migration
 
   def self.up
     create_table :transaction_actions do |t|
-      t.string :action, :limit => 128
+      t.string :action, :limit => 128, :null => false
       t.timestamps
     end
   end

db/migrate/20121204221242_create_bike.rb

@@ -2,16 +2,16 @@ class CreateBike < ActiveRecord::Migration
   def change
     create_table :bikes do |t|
       t.string   "serial_number"
-      t.integer  "bike_brand_id"
-      t.integer  "bike_model_id"
+      t.integer  "bike_brand_id", :null => false
+      t.integer  "bike_model_id", :null => false
       t.string   "color"
-      t.integer  "bike_style_id"
+      t.integer  "bike_style_id", :null => false
       t.float    "seat_tube_height"
       t.float    "top_tube_length"
       t.integer  "wheel_size"
       t.float    "value"
-      t.string   "bike_condition_id"
-      t.integer  "bike_status_id"
+      t.string   "bike_condition_id", :null => false
+      t.integer  "bike_status_id", :null => false
       t.timestamps
     end
   end

db/migrate/20121204223403_create_user_profile.rb

@@ -1,7 +1,7 @@
 class CreateUserProfile < ActiveRecord::Migration
   def change
     create_table :user_profiles do |t|
-      t.integer "user_id"
+      t.integer "user_id", :null => false
       t.string "first_name"
       t.string "last_name"
       t.string "addrStreet1"

db/migrate/20121205024701_create_bike_statuses.rb

@@ -1,7 +1,7 @@
 class CreateBikeStatuses < ActiveRecord::Migration
   def change
     create_table :bike_statuses do |t|
-      t.string "status"
+      t.string "status", :null => false
       t.timestamps
     end
   end

db/migrate/20121205040602_create_bike_models.rb

@@ -1,8 +1,8 @@
 class CreateBikeModels < ActiveRecord::Migration
   def change
     create_table :bike_models do |t|
-      t.integer "bike_brand_id"
-      t.string "model"
+      t.integer "bike_brand_id", :null => false
+      t.string "model", :null => false
       t.timestamps
     end
   end

db/migrate/20121205040829_create_bike_styles.rb

@@ -1,7 +1,7 @@
 class CreateBikeStyles < ActiveRecord::Migration
   def change
     create_table :bike_styles do |t|
-      t.string "style"
+      t.string "style", :null => false
       t.timestamps
     end
   end

db/migrate/20121205041000_create_bike_conditions.rb

@@ -1,7 +1,7 @@
 class CreateBikeConditions < ActiveRecord::Migration
   def change
     create_table :bike_conditions do |t|
-      t.string "condition"
+      t.string "condition", :null => false
       t.timestamps
     end
   end