Re: [xwiki-devs] why hasn't the class deletion been implemented?

Pascal Voitot wrote: We don't know what to do with the data. Adding a property is simple, existing objects will not have a property and it will be added when the object is saved. But when you delete a property, what do we do? Leave it there? Delete it from all the objects? If we keep it there, it will be "shadowed", as the persistence layer will not know that it exists. More, if we add back that property with the same name and another type, we'll have errors because we'll have two instances with the same identifier in two places (this is what happened when switching number types or the multiselect metaproperty of a list property). If we remove it, then we'll completely remove a lot of data. And is a warning enough for that? Probably we need a mass rollback utility that is able to revert bulk changes. My take is that we should remove the data, but what do others think? -- Sergiu Dumitriu http://purl.org/net/sergiu/