1、迁移文件增加回滚方法

2、作品表增加所属项目字段

app/models/project.rb

@@ -30,7 +30,7 @@ class Project < ActiveRecord::Base
 
   # Specific overidden Activities
 
-  belongs_to :homework_attach
+  has_many :student_works
   has_many :time_entry_activities
   has_many :members, :include => [:principal, :roles], :conditions => "#{Principal.table_name}.type='User' AND #{Principal.table_name}.status=#{Principal::STATUS_ACTIVE}"
   has_many :memberships, :class_name => 'Member'

app/models/student_work.rb

@@ -6,6 +6,7 @@ class StudentWork < ActiveRecord::Base
   belongs_to :user
   has_many :student_works_evaluation_distributions, :dependent => :destroy
   has_many :student_works_scores, :dependent => :destroy
+  belongs_to :project
 
   acts_as_attachable
 end

db/migrate/20150519012744_create_homework_commons.rb

@@ -1,5 +1,5 @@
 class CreateHomeworkCommons < ActiveRecord::Migration
-  def change
+  def up
     create_table :homework_commons do |t|
       t.string :name
       t.integer  :user_id
@@ -13,4 +13,8 @@ class CreateHomeworkCommons < ActiveRecord::Migration
       t.timestamps
     end
   end
+
+  def down
+    drop_table :homework_commons
+  end
 end

db/migrate/20150519014600_create_homework_detail_manuals.rb

@@ -1,5 +1,5 @@
 class CreateHomeworkDetailManuals < ActiveRecord::Migration
-  def change
+  def up
     create_table :homework_detail_manuals do |t|
       t.float :ta_proportion
       t.integer  :comment_status
@@ -12,4 +12,8 @@ class CreateHomeworkDetailManuals < ActiveRecord::Migration
       t.timestamps
     end
   end
+
+  def down
+    drop_table :homework_detail_manuals
+  end
 end

db/migrate/20150519014639_create_homework_detail_programings.rb

@@ -1,5 +1,5 @@
 class CreateHomeworkDetailProgramings < ActiveRecord::Migration
-  def change
+  def up
     create_table :homework_detail_programings do |t|
       t.string :language
       t.text  :standard_code, :limit => 4294967295
@@ -8,4 +8,8 @@ class CreateHomeworkDetailProgramings < ActiveRecord::Migration
       t.timestamps
     end
   end
+
+  def down
+    drop_table :homework_detail_programings
+  end
 end

db/migrate/20150519020031_create_homework_tests.rb

@@ -1,5 +1,5 @@
 class CreateHomeworkTests < ActiveRecord::Migration
-  def change
+  def up
     create_table :homework_tests do |t|
       t.text :input
       t.text  :output
@@ -8,4 +8,8 @@ class CreateHomeworkTests < ActiveRecord::Migration
       t.timestamps
     end
   end
+
+  def down
+    drop_table :homework_tests
+  end
 end

db/migrate/20150519022200_create_student_works.rb

@@ -1,5 +1,5 @@
 class CreateStudentWorks < ActiveRecord::Migration
-  def change
+  def up
     create_table :student_works do |t|
       t.string :name
       t.text  :description
@@ -9,8 +9,13 @@ class CreateStudentWorks < ActiveRecord::Migration
       t.float :teacher_score, default: 0
       t.float :student_score, default: 0
       t.float :teaching_asistant_score, default: 0
+      t.integer :project_id, default: 0
 
       t.timestamps
     end
   end
+
+  def down
+    drop_table :student_works
+  end
 end

db/migrate/20150519023821_create_student_works_evaluation_distributions.rb

@@ -1,5 +1,5 @@
 class CreateStudentWorksEvaluationDistributions < ActiveRecord::Migration
-  def change
+  def up
     create_table :student_works_evaluation_distributions do |t|
       t.integer :student_work_id
       t.integer  :user_id
@@ -7,4 +7,8 @@ class CreateStudentWorksEvaluationDistributions < ActiveRecord::Migration
       t.timestamps
     end
   end
+
+  def down
+    drop_table :student_works_evaluation_distributions
+  end
 end

db/migrate/20150519030544_create_student_works_scores.rb

@@ -1,5 +1,5 @@
 class CreateStudentWorksScores < ActiveRecord::Migration
-  def change
+  def up
     create_table :student_works_scores do |t|
       t.integer :student_work_id
       t.integer :user_id
@@ -9,4 +9,8 @@ class CreateStudentWorksScores < ActiveRecord::Migration
       t.timestamps
     end
   end
+
+  def down
+    drop_table :student_works_scores
+  end
 end

db/schema.rb

@@ -1207,6 +1207,7 @@ ActiveRecord::Schema.define(:version => 20150519030544) do
     t.float    "teacher_score",           :default => 0.0
     t.float    "student_score",           :default => 0.0
     t.float    "teaching_asistant_score", :default => 0.0
+    t.integer  "project_id",              :default => 0
     t.datetime "created_at",                               :null => false
     t.datetime "updated_at",                               :null => false
   end