学生提交作品表，以及相关的关系

app/models/homework_common.rb

@@ -8,4 +8,5 @@ class HomeworkCommon < ActiveRecord::Base
   has_one :homework_detail_manual, :dependent => :destroy
   has_one :homework_detail_programing, :dependent => :destroy
   has_many :homework_tests, :dependent => :destroy
+  has_many :student_works, :dependent => :destroy
 end

app/models/student_work.rb

@@ -0,0 +1,7 @@
+#学生提交作品表
+class StudentWork < ActiveRecord::Base
+  attr_accessible :name, :description, :homework_common_id, :user_id, :final_score, :teacher_score, :student_score, :teaching_asistant_score
+
+  belongs_to :homework_common
+  belongs_to :user
+end

app/models/user.rb

@@ -83,6 +83,7 @@ class User < Principal
   # end
   #作业相关关系
   has_many :homework_commons, :dependent => :destroy
+  has_many :student_works, :dependent => :destroy
   #end
 
   has_and_belongs_to_many :groups, :after_add => Proc.new {|user, group| group.user_added(user)},

db/migrate/20150519022200_create_student_works.rb

@@ -0,0 +1,16 @@
+class CreateStudentWorks < ActiveRecord::Migration
+  def change
+    create_table :student_works do |t|
+      t.string :name
+      t.text  :description
+      t.integer :homework_common_id
+      t.integer :user_id
+      t.float :final_score, default: 0
+      t.float :teacher_score, default: 0
+      t.float :student_score, default: 0
+      t.float :teaching_asistant_score, default: 0
+
+      t.timestamps
+    end
+  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 => 20150519020031) do
+ActiveRecord::Schema.define(:version => 20150519022200) do
 
   create_table "activities", :force => true do |t|
     t.integer "act_id",   :null => false
@@ -1198,6 +1198,19 @@ ActiveRecord::Schema.define(:version => 20150519020031) do
     t.integer  "project_id"
   end
 
+  create_table "student_works", :force => true do |t|
+    t.string   "name"
+    t.text     "description"
+    t.integer  "homework_common_id"
+    t.integer  "user_id"
+    t.float    "final_score",             :default => 0.0
+    t.float    "teacher_score",           :default => 0.0
+    t.float    "student_score",           :default => 0.0
+    t.float    "teaching_asistant_score", :default => 0.0
+    t.datetime "created_at",                               :null => false
+    t.datetime "updated_at",                               :null => false
+  end
+
   create_table "students_for_courses", :force => true do |t|
     t.integer  "student_id"
     t.integer  "course_id"