新的老师布置的作业表添加，以及相关关系定义

app/models/course.rb

@@ -10,7 +10,7 @@ class Course < ActiveRecord::Base
   #belongs_to :project, :class_name => 'Course', :foreign_key => :extra, primary_key: :identifier
   belongs_to :teacher, :class_name => 'User', :foreign_key => :tea_id  # 定义一个方法teacher，该方法通过tea_id来调用User表
   belongs_to :school, :class_name => 'School', :foreign_key => :school_id #定义一个方法school，该方法通过school_id来调用School表
-  has_many :bid
+  # has_many :bid
   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'
   has_many :member_principals, :class_name => 'Member',
@@ -18,7 +18,7 @@ class Course < ActiveRecord::Base
            :conditions => "#{Principal.table_name}.type='Group' OR (#{Principal.table_name}.type='User' AND #{Principal.table_name}.status=#{Principal::STATUS_ACTIVE})"
   has_many :principals, :through => :member_principals, :source => :principal
   has_many :users, :through => :members
-  has_many :homeworks, :through => :homework_for_courses, :source => :bid, :dependent => :destroy
+  # has_many :homeworks, :through => :homework_for_courses, :source => :bid, :dependent => :destroy
   has_many :journals_for_messages, :as => :jour, :dependent => :destroy
   has_many :homework_for_courses, :dependent => :destroy
   has_many :student, :class_name => 'StudentsForCourse', :source => :user
@@ -29,6 +29,8 @@ class Course < ActiveRecord::Base
   has_many :news, :dependent => :destroy, :include => :author
   has_one :course_status, :class_name => "CourseStatus", :dependent => :destroy
 
+  has_many :homework_commons, :dependent => :destroy
+
   has_many :course_groups, :dependent => :destroy
 
   acts_as_taggable

app/models/homework_common.rb

@@ -0,0 +1,7 @@
+#老师布置的作业表
+class HomeworkCommon < ActiveRecord::Base
+  attr_accessible :name, :user_id, :description, :publish_time, :end_time, :homework_type, :late_penalty, :course_id
+
+  belongs_to :course
+  belongs_to :user
+end

app/models/user.rb

@@ -75,13 +75,15 @@ class User < Principal
   has_many :homework_users
   has_many :homework_attaches, :through => :homework_users
   has_many :homework_evaluations
-
   #问卷相关关关系
   has_many :poll_users, :dependent => :destroy
   has_many :poll_votes, :dependent => :destroy
   has_many :poll, :dependent => :destroy #用户创建的问卷
   has_many :answers, :source => :poll, :through => :poll_users, :dependent => :destroy #用户已经完成问答的问卷
   # end
+  #作业相关关系
+  has_many :homework_commons, :dependent => :destroy
+  #end
 
   has_and_belongs_to_many :groups, :after_add => Proc.new {|user, group| group.user_added(user)},
                                    :after_remove => Proc.new {|user, group| group.user_removed(user)}
@@ -92,7 +94,7 @@ class User < Principal
   belongs_to :auth_source
   belongs_to :ucourse, :class_name => 'Course', :foreign_key => :id  #huang
 ## added by xianbo for delete 
-  has_many :biding_projects, :dependent => :destroy
+  # has_many :biding_projects, :dependent => :destroy
   has_many :contesting_projects, :dependent => :destroy
   belongs_to :softapplication, :foreign_key => 'id', :dependent => :destroy
 ##ended by xianbo
@@ -100,7 +102,7 @@ class User < Principal
 #####fq
   has_many :jours, :class_name => 'JournalsForMessage', :dependent => :destroy
   has_many :journals_messages, :class_name => 'JournalsForMessage', :foreign_key => "user_id", :dependent => :destroy
-  has_many :bids, :foreign_key => 'author_id', :dependent => :destroy
+  # has_many :bids, :foreign_key => 'author_id', :dependent => :destroy
   has_many :contests, :foreign_key => 'author_id', :dependent => :destroy
   has_many :softapplications, :foreign_key => 'user_id', :dependent => :destroy
   has_many :journals_for_messages, :as => :jour, :dependent => :destroy
@@ -257,16 +259,6 @@ class User < Principal
     end
   end
   
-  # 判断用户是否加入了竞赛中 fq
-  def join_in_contest?(bid)
-    joined = JoinInContest.where('user_id = ? and bid_id =?', self.id, bid.id)
-    if joined.size > 0
-      true
-    else
-      false
-    end
-  end
-  
   ### fq
   def join_in?(course)
     joined = StudentsForCourse.where('student_id = ? and course_id = ?', self.id, course.id)

db/migrate/20150519012744_create_homework_commons.rb

@@ -0,0 +1,16 @@
+class CreateHomeworkCommons < ActiveRecord::Migration
+  def change
+    create_table :homework_commons do |t|
+      t.string :name
+      t.integer  :user_id
+      t.text :description
+      t.date  :publish_time
+      t.date :end_time
+      t.integer :homework_type,  default: 1
+      t.string  :late_penalty
+      t.integer :course_id
+
+      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 => 20150514133640) do
+ActiveRecord::Schema.define(:version => 20150519012744) do
 
   create_table "activities", :force => true do |t|
     t.integer "act_id",   :null => false
@@ -541,9 +541,21 @@ ActiveRecord::Schema.define(:version => 20150514133640) do
     t.integer  "is_teacher_score", :default => 0
   end
 
-  add_index "homework_attaches", ["bid_id"], :name => "bid_id"
   add_index "homework_attaches", ["bid_id"], :name => "index_homework_attaches_on_bid_id"
 
+  create_table "homework_commons", :force => true do |t|
+    t.string   "name"
+    t.integer  "user_id"
+    t.text     "description"
+    t.date     "publish_time"
+    t.date     "end_time"
+    t.integer  "type",         :default => 1
+    t.string   "late_penalty"
+    t.integer  "course_id"
+    t.datetime "created_at",                  :null => false
+    t.datetime "updated_at",                  :null => false
+  end
+
   create_table "homework_evaluations", :force => true do |t|
     t.string   "user_id"
     t.string   "homework_attach_id"
@@ -556,9 +568,7 @@ ActiveRecord::Schema.define(:version => 20150514133640) do
     t.integer "bid_id"
   end
 
-  add_index "homework_for_courses", ["bid_id"], :name => "bid_id"
   add_index "homework_for_courses", ["bid_id"], :name => "index_homework_for_courses_on_bid_id"
-  add_index "homework_for_courses", ["course_id"], :name => "course_id"
   add_index "homework_for_courses", ["course_id"], :name => "index_homework_for_courses_on_course_id"
 
   create_table "homework_users", :force => true do |t|
@@ -1163,14 +1173,12 @@ ActiveRecord::Schema.define(:version => 20150514133640) do
   create_table "students_for_courses", :force => true do |t|
     t.integer  "student_id"
     t.integer  "course_id"
-    t.datetime "created_at",     :null => false
-    t.datetime "updated_at",     :null => false
-    t.integer  "student_idCopy"
+    t.datetime "created_at", :null => false
+    t.datetime "updated_at", :null => false
   end
 
   add_index "students_for_courses", ["course_id"], :name => "index_students_for_courses_on_course_id"
   add_index "students_for_courses", ["student_id"], :name => "index_students_for_courses_on_student_id"
-  add_index "students_for_courses", ["student_id"], :name => "student_id"
 
   create_table "taggings", :force => true do |t|
     t.integer  "tag_id"