在Django模板中显示未知数量的字段，并将另一条记录的字段内容作为标签

I have a Django app which I want to be able to use in multiple instances. One model (Listing) can have a variable number of fields (for the different instances) but will then always have exactly those extra fields for the instance. I want these extra fields added through admin so I've created models like this:I have a Django app which I want to be able to