历史数据迁移

db/migrate/20161015102324_update_all_rake.rb

@@ -0,0 +1,23 @@
+class UpdateAllRake < ActiveRecord::Migration
+  def up
+    attachments = Attachment.where("is_publish = 0 and publish_time <= #{Date.today}")
+    attachments.update_all(:is_publish => 1)
+
+    exercises = Exercise.where("publish_time is not null and exercise_status = 1 and publish_time <=?",Time.now)
+    exercises.update_all(:exercise_status => 2)
+
+    end_exercises = Exercise.where("end_time <=? and exercise_status = 2",Time.now)
+    end_exercises.each do |exercise|
+      course = exercise.course
+      exercise.update_column('exercise_status', 3)
+      course.student.each do |student|
+        if ExerciseUser.where("user_id = ? && exercise_id = ?",student.student_id,exercise.id).empty?
+          ExerciseUser.create(:user_id => student.student_id, :exercise_id => exercise.id, :start_at => exercise.end_time, :status => true,:score=>0)
+        end
+      end
+    end
+  end
+
+  def down
+  end
+end