作业动态报500

app/models/student_work.rb

@@ -4,7 +4,7 @@ class StudentWork < ActiveRecord::Base
 
   belongs_to :homework_common
   belongs_to :user
-  has_many :student_work_projects
+  has_many :student_work_projects, :dependent => :destroy
   has_many :student_works_evaluation_distributions, :dependent => :destroy
   has_many :student_works_scores, :dependent => :destroy
   belongs_to :project

db/migrate/20161114092115_delete_null_studnet_work_project.rb

@@ -0,0 +1,17 @@
+class DeleteNullStudnetWorkProject < ActiveRecord::Migration
+  def up
+    count = StudentWorkProject.all.count / 30 + 2
+    transaction do
+      for i in 1 ... count do i
+          StudentWorkProject.page(i).per(30).each do |sp|
+            if !sp.student_work_id.nil? && sp.student_work.nil?
+              sp.destroy
+            end
+          end
+      end
+    end
+  end
+
+  def down
+  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 => 20161111081619) do
+ActiveRecord::Schema.define(:version => 20161114092115) do
 
   create_table "activities", :force => true do |t|
     t.integer  "act_id",                                  :null => false
@@ -325,16 +325,14 @@ ActiveRecord::Schema.define(:version => 20161111081619) do
   add_index "changeset_parents", ["parent_id"], :name => "changeset_parents_parent_ids"
 
   create_table "changesets", :force => true do |t|
-    t.integer  "repository_id",                :null => false
-    t.string   "revision",                     :null => false
+    t.integer  "repository_id", :null => false
+    t.string   "revision",      :null => false
     t.string   "committer"
-    t.datetime "committed_on",                 :null => false
+    t.datetime "committed_on",  :null => false
     t.text     "comments"
     t.date     "commit_date"
     t.string   "scmid"
     t.integer  "user_id"
-    t.integer  "project_id"
-    t.integer  "type",          :default => 0
   end
 
   add_index "changesets", ["committed_on"], :name => "index_changesets_on_committed_on"
@@ -518,6 +516,20 @@ ActiveRecord::Schema.define(:version => 20161111081619) do
     t.integer  "container_id",   :default => 0
   end
 
+  create_table "course_class_post", :id => false, :force => true do |t|
+    t.integer  "班级id",   :default => 0,  :null => false
+    t.string   "班级名"
+    t.integer  "帖子id",   :default => 0,  :null => false
+    t.integer  "主贴id"
+    t.string   "帖子标题",   :default => "", :null => false
+    t.text     "帖子内容"
+    t.integer  "帖子用户id"
+    t.integer  "帖子回复数",  :default => 0,  :null => false
+    t.integer  "最后回帖id"
+    t.datetime "发帖时间",                   :null => false
+    t.datetime "帖子更新时间",                 :null => false
+  end
+
   create_table "course_contributor_scores", :force => true do |t|
     t.integer  "course_id"
     t.integer  "user_id"
@@ -995,10 +1007,6 @@ ActiveRecord::Schema.define(:version => 20161111081619) do
     t.datetime "updated_at",         :null => false
   end
 
-  create_table "innodb_monitor", :id => false, :force => true do |t|
-    t.integer "a"
-  end
-
   create_table "invite_lists", :force => true do |t|
     t.integer  "project_id"
     t.integer  "user_id"