Initial commit

db/migrate/20190401121727_update_order_state.rb

@@ -0,0 +1,23 @@
+class UpdateOrderState < ActiveRecord::Migration[5.0]
+  def up
+    case ActiveRecord::Base.connection.adapter_name
+    when 'Mysql2'
+      execute('UPDATE orders SET orders.state = -100 WHERE orders.state = 0')
+    when 'PostgreSQL'
+      execute('UPDATE "orders" SET "state" = -100 WHERE "orders"."state" = 0')
+    else
+      raise "Unsupported adapter: #{ActiveRecord::Base.connection.adapter_name}"
+    end
+  end
+
+  def down
+    case ActiveRecord::Base.connection.adapter_name
+    when 'Mysql2'
+      execute('UPDATE orders SET orders.state = 0 WHERE orders.state = -100')
+    when 'PostgreSQL'
+      execute('UPDATE "orders" SET "state" = 0 WHERE "orders"."state" = -100')
+    else
+      raise "Unsupported adapter: #{ActiveRecord::Base.connection.adapter_name}"
+    end
+  end
+end