Make all calculators use FlatPercentPerItem instead of FlatPercentItemTotal

db/migrate/20160819065331_swap_calculator_to_flat_percent_per_item.rb

@@ -0,0 +1,29 @@
+class SwapCalculatorToFlatPercentPerItem < ActiveRecord::Migration
+  class Spree::Calculator < ActiveRecord::Base
+  end
+
+  def up
+    Spree::Calculator.where(calculable_type: "EnterpriseFee", type: 'Spree::Calculator::FlatPercentItemTotal').each do |c|
+      swap_calculator_type c, 'Calculator::FlatPercentPerItem'
+    end
+  end
+
+  def down
+    Spree::Calculator.where(calculable_type: "EnterpriseFee", type: 'Spree::Calculator::FlatPercentPerItem').each do |c|
+      swap_calculator_type c, 'Calculator::FlatPercentItemTotal'
+    end
+  end
+
+
+  private
+
+  def swap_calculator_type(calculator, to_class)
+    value = calculator.preferred_flat_percent
+
+    calculator.type = to_class
+    calculator.save
+
+    calculator = Spree::Calculator.find calculator.id
+    calculator.preferred_flat_percent = value
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20160713013358) do
+ActiveRecord::Schema.define(:version => 20160819065331) do
 
   create_table "account_invoices", :force => true do |t|
     t.integer  "user_id",    :null => false
@@ -582,9 +582,9 @@ ActiveRecord::Schema.define(:version => 20160713013358) do
     t.string   "email"
     t.text     "special_instructions"
     t.integer  "distributor_id"
+    t.integer  "order_cycle_id"
     t.string   "currency"
     t.string   "last_ip_address"
-    t.integer  "order_cycle_id"
     t.integer  "cart_id"
     t.integer  "customer_id"
   end