课程表的数据迁移

db/migrate/20160220100507_update_course_term.rb

@@ -0,0 +1,19 @@
+class UpdateCourseTerm < ActiveRecord::Migration
+  def up
+    count = Course.all.count / 30 + 2
+    transaction do
+      for i in 1 ... count do i
+      Course.page(i).per(30).each do |course|
+        if course.end_time.nil? && course.end_term.nil?
+          course.end_time = course.time
+          course.end_term = course.term
+          course.save
+        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 => 20160202034530) do
+ActiveRecord::Schema.define(:version => 20160220100507) do
 
   create_table "activities", :force => true do |t|
     t.integer  "act_id",                                  :null => false
@@ -1219,7 +1219,6 @@ ActiveRecord::Schema.define(:version => 20160202034530) do
   create_table "org_members", :force => true do |t|
     t.integer  "user_id"
     t.integer  "organization_id"
-    t.string   "role"
     t.datetime "created_at",      :null => false
     t.datetime "updated_at",      :null => false
   end