分班的position迁移

db/migrate/20200114071917_migrate_coure_group_position.rb

@@ -6,7 +6,7 @@ class MigrateCoureGroupPosition < ActiveRecord::Migration[5.2]
     courses = Course.where(id: course_ids)
 
     courses.each do |course|
-      CourseGroup.where(coures_id: course.id).reorder("position ASC, CONVERT(course_groups.name USING gbk) COLLATE gbk_chinese_ci ASC").each_with_index do |group, index|
+      CourseGroup.where(course_id: course.id).reorder("position ASC, CONVERT(course_groups.name USING gbk) COLLATE gbk_chinese_ci ASC").each_with_index do |group, index|
         group.update!(position: index+1)
       end
     end