增加迁移文件

db/migrate/20150702073245_add_late_penalty_to_studnet_work.rb

@@ -0,0 +1,9 @@
+class AddLatePenaltyToStudnetWork < ActiveRecord::Migration
+  def up
+    add_column :student_works, :late_penalty, :integer, default: 0
+  end
+
+  def down
+    remove_column :student_works, :late_penalty
+  end
+end

db/migrate/20150702073308_add_absence_penalty_to_studnet_work.rb

@@ -0,0 +1,9 @@
+class AddAbsencePenaltyToStudnetWork < ActiveRecord::Migration
+  def up
+    add_column :student_works, :absence_penalty, :integer, default: 0
+  end
+
+  def down
+    remove_column :student_works, :absence_penalty
+  end
+end