class AddCourseidToToMembers < ActiveRecord::Migration def change add_column :members, :course_id, :int # 课程成员数据迁移 Member.all.each do |member| project = Project.find_by_id(member.project_id) if project && project.project_type == 1 member.course_id = member.project_id member.project_id = nil member.save end end end end