增加系统评分

db/migrate/20150815030833_add_system_score_to_student_work.rb

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

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20150814031258) do
+ActiveRecord::Schema.define(:version => 20150815030833) do
 
   create_table "activities", :force => true do |t|
     t.integer "act_id",                                  :null => false
@@ -1276,6 +1276,7 @@ ActiveRecord::Schema.define(:version => 20150814031258) do
     t.datetime "updated_at",                                                   :null => false
     t.integer  "late_penalty",                                  :default => 0
     t.integer  "absence_penalty",                               :default => 0
+    t.integer  "system_score"
   end
 
   create_table "student_works_evaluation_distributions", :force => true do |t|