class AddCourseidToToMembers < ActiveRecord::Migration
  def change
    add_column :members, :course_id, :int
    change_column_null(:members, :project_id, true)
    remove_index :members, name: 'index_members_on_user_id_and_project_id'
    add_index "members", ["user_id", "project_id","course_id"], :name => "index_members_on_user_id_and_project_id", :unique => true

    Member.where('project_id IN (SELECT id FROM projects WHERE project_type=1)').update_all("course_id = project_id")
    Member.where('project_id IN (SELECT id FROM projects WHERE project_type=1)').update_all(project_id: -1)

    # 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 = -1
    #   member.save
    #  end
    #end
  end
end