Complete refactoring of orders-workflow.

OrderResult tables are removed. Data consistency is now possible through new article.price-history (ArticlePrice).
Balancing-workflow needs to be updated.

db/migrate/20090120184410_refactor_order_logic.rb

@@ -0,0 +1,68 @@
+class RefactorOrderLogic < ActiveRecord::Migration
+  def self.up
+    # TODO: Combine migrations since foodsoft3-development into one file
+    # and try to build a migration path from old data.
+
+    # articles
+    rename_column :articles, :net_price, :price
+    remove_column :articles, :gross_price
+
+    # orders
+    drop_table :orders
+    drop_table :group_order_results
+    drop_table :order_article_results
+    drop_table :group_order_article_results
+    GroupOrder.delete_all; OrderArticle.delete_all; GroupOrderArticle.delete_all; GroupOrderArticleQuantity.delete_all
+
+    create_table :orders do |t|
+      t.references :supplier
+      t.text :note
+      t.datetime :starts
+      t.datetime :ends
+      t.string :state, :default => "open"   # Statemachine ... open -> finished -> closed
+      t.integer :lock_version, :default => 0, :null => false
+      t.integer :updated_by_user_id
+    end
+
+    # invoices
+    add_column :invoices, :order_id, :integer
+    add_column :invoices, :deposit, :decimal, :precision => 8, :scale => 2, :default => 0.0,  :null => false
+    add_column :invoices, :deposit_credit, :decimal, :precision => 8, :scale => 2, :default => 0.0,  :null => false
+
+    # comments
+    drop_table :comments
+    create_table :order_comments do |t|
+      t.references :order
+      t.references :user
+      t.text :text
+      t.datetime :created_at
+    end
+
+    # article_prices
+    create_table :article_prices do |t|
+      t.references :article
+      t.decimal :price, :precision => 8, :scale => 2, :default => 0.0, :null => false
+      t.decimal :tax, :precision => 8, :scale => 2, :default => 0.0, :null => false
+      t.decimal :deposit, :precision => 8, :scale => 2, :default => 0.0, :null => false
+      t.integer :unit_quantity
+      t.datetime :created_at
+    end
+    # Create price history for every Article
+    Article.all.each do |a|
+      a.article_prices.create :price => a.price, :tax => a.tax,
+        :deposit => a.deposit, :unit_quantity => a.unit_quantity
+    end
+    # Every Article has now a Category. Fix it if neccessary.
+    Article.all(:conditions => { :article_category_id => nil }).each do |article|
+        article.update_attribute(:article_category, ArticleCategory.first)
+    end
+    # order-articles
+    add_column :order_articles, :article_price_id, :integer
+
+    # ordergroups
+    add_column :groups, :deleted_at, :datetime
+  end
+
+  def self.down
+  end
+end