数据库修改以及一对一，一对多，多对多等关系的确立

app/models/exercise.rb

@@ -3,5 +3,5 @@ class Exercise < ActiveRecord::Base
   belongs_to :user
   has_many :exercise_questions, :dependent => :destroy,:order => "#{ExerciseQuestion.table_name}.question_number"
   has_many :exercise_users, :dependent => :destroy
-  has_many :users, :through => :exercise_users #该文件被哪些用户提交答案过
+  has_many :users, :through => :exercise_users #该测试被哪些用户提交答案过
 end

app/models/exercise_answer.rb

@@ -4,5 +4,5 @@ class ExerciseAnswer < ActiveRecord::Base
 
   belongs_to :user
   belongs_to :exercise_question
-  belongs_to :exercise_choices
+  belongs_to :exercise_choice
 end

app/models/exercise_choice.rb

@@ -1,4 +1,4 @@
-class ExerciseChoices < ActiveRecord::Base
+class ExerciseChoice < ActiveRecord::Base
   include Redmine::SafeAttributes
 
   belongs_to :exercise_question

app/models/exercise_question.rb

@@ -2,7 +2,7 @@ class ExerciseQuestion < ActiveRecord::Base
   include Redmine::SafeAttributes
 
   belongs_to :exercise
-  has_many :exercise_choiceses, :order => "#{ExerciseChoices.table_name}.choice_position",:dependent => :destroy
+  has_many :exercise_choices, :order => "#{ExerciseChoice.table_name}.choice_position",:dependent => :destroy
   has_many :exercise_answers, :dependent => :destroy
   has_many :exercise_standard_answers, :dependent => :destroy
 end

app/models/exercise_standard_answer.rb

@@ -3,5 +3,5 @@ class ExerciseStandardAnswer < ActiveRecord::Base
   include Redmine::SafeAttributes
 
   belongs_to :exercise_question
-  belongs_to :exercise_choices
+  belongs_to :exercise_choice
 end

app/models/user.rb

@@ -82,10 +82,10 @@ class User < Principal
   has_many :answers, :source => :poll, :through => :poll_users, :dependent => :destroy #用户已经完成问答的问卷
   # end
   #在线测验相关关系
-  has_many :exercise_users, :dependent => :destroy  #答卷中间表
-  has_many :exercise_answers, :dependent => :destroy  #针对每个题目学生的答案
+  has_many :exercise_user, :dependent => :destroy  #答卷中间表
+  has_many :exercise_answer, :dependent => :destroy  #针对每个题目学生的答案
   has_many :exercises, :dependent => :destroy  #创建的试卷
-  has_many :exercises_answers, :source => :exercises, :through => :exercise_users, :dependent => :destroy #用户已经完成问答的试卷
+  has_many :exercises_answers, :source => :exercise, :through => :exercise_user, :dependent => :destroy #用户已经完成问答的试卷
   #end
   #作业相关关系
   has_many :homework_commons, :dependent => :destroy

db/migrate/20151113025341_exercise.rb

@@ -1,6 +1,6 @@
 class Exercise < ActiveRecord::Migration
   def up
-    create_table :exercise do |t|
+    create_table :exercises do |t|
       t.string :exercise_name
       t.text :exercise_description
       t.integer :course_id

db/migrate/20151113025459_exercise_question.rb

@@ -1,6 +1,6 @@
 class ExerciseQuestion < ActiveRecord::Migration
   def up
-    create_table :exercise_question do |t|
+    create_table :exercise_questions do |t|
       t.string :question_title
       t.integer :question_type
       t.integer :question_number

db/migrate/20151113025549_exercise_standard_answer.rb

@@ -1,8 +1,8 @@
 class ExerciseStandardAnswer < ActiveRecord::Migration
   def up
-    create_table :exercise_standard_answer do |t|
+    create_table :exercise_standard_answers do |t|
       t.integer :exercise_question_id
-      t.integer :exercise_choices_id
+      t.integer :exercise_choice_id
       t.text :answer_text
       t.timestamps
     end

db/migrate/20151113025721_exercise_answer.rb

@@ -1,9 +1,9 @@
 class ExerciseAnswer < ActiveRecord::Migration
   def up
-    create_table :exercise_answer do |t|
+    create_table :exercise_answers do |t|
       t.integer :user_id
       t.integer :exercise_question_id
-      t.integer :exercise_choices_id
+      t.integer :exercise_choice_id
       t.text :answer_text
       t.timestamps
     end

db/migrate/20151113025751_user_exercise.rb

@@ -1,6 +1,6 @@
 class UserExercise < ActiveRecord::Migration
   def up
-    create_table :exercise_user do |t|
+    create_table :exercise_users do |t|
       t.integer :user_id
       t.integer :exercise_id
       t.integer :score

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20151112072948) do
+ActiveRecord::Schema.define(:version => 20151113025751) do
 
   create_table "activities", :force => true do |t|
     t.integer  "act_id",                                  :null => false
@@ -572,6 +572,60 @@ ActiveRecord::Schema.define(:version => 20151112072948) do
   add_index "enumerations", ["id", "type"], :name => "index_enumerations_on_id_and_type"
   add_index "enumerations", ["project_id"], :name => "index_enumerations_on_project_id"
 
+  create_table "exercise_answers", :force => true do |t|
+    t.integer  "user_id"
+    t.integer  "exercise_question_id"
+    t.integer  "exercise_choices_id"
+    t.text     "answer_text"
+    t.datetime "created_at",           :null => false
+    t.datetime "updated_at",           :null => false
+  end
+
+  create_table "exercise_choices", :force => true do |t|
+    t.integer  "exercise_question_id"
+    t.text     "choice_text"
+    t.integer  "choice_position"
+    t.datetime "created_at",           :null => false
+    t.datetime "updated_at",           :null => false
+  end
+
+  create_table "exercise_questions", :force => true do |t|
+    t.string   "question_title"
+    t.integer  "question_type"
+    t.integer  "question_number"
+    t.integer  "exercise_id"
+    t.datetime "created_at",      :null => false
+    t.datetime "updated_at",      :null => false
+  end
+
+  create_table "exercise_standard_answers", :force => true do |t|
+    t.integer  "exercise_question_id"
+    t.integer  "exercise_choices_id"
+    t.text     "answer_text"
+    t.datetime "created_at",           :null => false
+    t.datetime "updated_at",           :null => false
+  end
+
+  create_table "exercise_users", :force => true do |t|
+    t.integer  "user_id"
+    t.integer  "exercise_id"
+    t.integer  "score"
+    t.datetime "start_at"
+    t.datetime "created_at",  :null => false
+    t.datetime "updated_at",  :null => false
+  end
+
+  create_table "exercises", :force => true do |t|
+    t.string   "exercise_name"
+    t.text     "exercise_description"
+    t.integer  "course_id"
+    t.integer  "exercise_status"
+    t.integer  "user_id"
+    t.integer  "time"
+    t.datetime "created_at",           :null => false
+    t.datetime "updated_at",           :null => false
+  end
+
   create_table "first_pages", :force => true do |t|
     t.string   "web_title"
     t.string   "title"