编程作业表增加question_id字段

db/migrate/20150709071731_add_question_id_to_homework.rb

@@ -0,0 +1,9 @@
+class AddQuestionIdToHomework < ActiveRecord::Migration
+  def up
+    add_column :homework_detail_programings, :question_id, :integer
+  end
+
+  def down
+    remove_column :homework_detail_programings, :question_id
+  end
+end