0
我为管理面板安装'rails_admin'gem。我已经'will_paginate-bootstrap'宝石。 This is my admin panel未定义的方法`per'for#<Customer :: ActiveRecord_Relation:0x007f6ef6d11b60> for rails_admin gem and will_paginate-bootstrap gem on admin panel
当我点击型号名称Error for my page
此错误occour。