Add AdjustmentMetadata, for holding info about enterprise fee adjustments at time of creation

app/models/adjustment_metadata.rb

@@ -0,0 +1,4 @@
+class AdjustmentMetadata < ActiveRecord::Base
+  belongs_to :adjustment, class_name: 'Spree::Adjustment'
+  belongs_to :enterprise
+end

app/models/spree/adjustment_decorator.rb

@@ -1,5 +1,7 @@
 module Spree
   Adjustment.class_eval do
+    has_one :metadata, class_name: 'AdjustmentMetadata'
+
     scope :enterprise_fee, where(originator_type: 'EnterpriseFee')
   end
 end

db/migrate/20130809075103_create_adjustment_metadata.rb

@@ -0,0 +1,13 @@
+class CreateAdjustmentMetadata < ActiveRecord::Migration
+  def change
+    create_table :adjustment_metadata do |t|
+      t.integer :adjustment_id
+      t.integer :enterprise_id
+      t.string :fee_name
+      t.string :fee_type
+      t.string :enterprise_role
+    end
+
+    add_index :adjustment_metadata, :adjustment_id
+  end
+end

db/schema.rb

@@ -11,7 +11,17 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20130809045637) do
+ActiveRecord::Schema.define(:version => 20130809075103) do
+
+  create_table "adjustment_metadata", :force => true do |t|
+    t.integer "adjustment_id"
+    t.integer "enterprise_id"
+    t.string  "fee_name"
+    t.string  "fee_type"
+    t.string  "enterprise_role"
+  end
+
+  add_index "adjustment_metadata", ["adjustment_id"], :name => "index_adjustment_metadata_on_adjustment_id"
 
   create_table "carts", :force => true do |t|
     t.integer "user_id"

spec/factories.rb

@@ -97,6 +97,14 @@ FactoryGirl.define do
     calculator { FactoryGirl.build(:itemwise_calculator) }
   end
 
+  factory :adjustment_metadata, :class => AdjustmentMetadata do
+    adjustment { FactoryGirl.create(:adjustment) }
+    enterprise { FactoryGirl.create(:distributor_enterprise) }
+    fee_name 'fee'
+    fee_type 'packing'
+    enterprise_role 'distributor'
+  end
+
   factory :itemwise_calculator, :class => OpenFoodWeb::Calculator::Itemwise do
   end
 

spec/models/adjustment_metadata_spec.rb

@@ -0,0 +1,6 @@
+describe AdjustmentMetadata do
+  it "is valid when build from factory" do
+    adjustment = create(:adjustment)
+    adjustment.should be_valid
+  end
+end

spec/models/adjustment_spec.rb

@@ -0,0 +1,8 @@
+module Spree
+  describe Adjustment do
+    it "has metadata" do
+      adjustment = create(:adjustment, metadata: create(:adjustment_metadata))
+      adjustment.metadata.should be
+    end
+  end
+end