Add indexes for better sql query performance.

db/migrate/20090907120012_add_missing_indexes.rb

@@ -0,0 +1,35 @@
+class AddMissingIndexes < ActiveRecord::Migration
+  def self.up
+    add_index "article_prices", ["article_id"]
+    
+    add_index "articles", ["supplier_id"]
+    add_index "articles", ["article_category_id"]
+    add_index "articles", ["type"]
+    
+    add_index "deliveries", ["supplier_id"]
+
+    add_index "financial_transactions", ["ordergroup_id"]
+
+    add_index "group_order_article_quantities", ["group_order_article_id"]
+    add_index "group_orders", ["order_id"]
+    add_index "group_orders", ["ordergroup_id"]
+
+    add_index "invoices", ["supplier_id"]
+    add_index "invoices", ["delivery_id"]
+
+    add_index "order_articles", ["order_id"]
+    
+    add_index "order_comments", ["order_id"]
+    
+    add_index "orders", ["state"]
+
+    add_index "stock_changes", ["delivery_id"] 
+    add_index "stock_changes", ["stock_article_id"] 
+    add_index "stock_changes", ["stock_taking_id"]
+
+    add_index "tasks", ["workgroup_id"]   
+  end
+
+  def self.down
+  end
+end