Hi, according to Ultimate Portfolio app I have tried to make own small project. It is just database of shops and categories. Even if I went through manual several time, I still have two problems. First is when I click on button Delete Data, view Shops updates just when I turn off / on app. Second is when click on Vopi shop and delete Category by swipe left it makes temporary New Category. Last one is when I click on + , I have to go back to shops then back and category is there. Could you help mi please? Here is my project: http://www.internetstream.cz/transfer/shops.zip

hi Jiří,

i can help with the second and the third problems:

Second is when click on Vopi shop and delete Category by swipe left it makes temporary New Category. Last one is when I click on + , I have to go back to shops then back and category is there.

in your CategoriesView, you have let shop: Shop, but you should instead have

@ObservedObject var shop: Shop

i'll continue to look at solving the first problem involving batch deletions on its own, although Shop deletions can certainly be solved by writing this

        let fetchRequest: NSFetchRequest<Shop> = Shop.fetchRequest()
        do {
            let shops = try container.viewContext.fetch(fetchRequest)
            for shop in shops {
                delete(shop)
            }
        } catch let error as NSError {
            print("Error: \(error.localizedDescription)")
        }

and the same would work for Categories (although if you mark the Delete rule for Shop.categories as "Cascade," all categories would as well be deleted just by running the code above).

hope that helps,

DMG

Thanks a lot DMG, so "stupid" beginner mistake :-) Have a great day! Jiri