MOC | An APP | Portfolio library

I have a simple entity with identifier (constraint) and name fields. In ViewController I try to add data to the database without worrying about duplicates and there really is no duplicate data in the database, but when I try to get records, I get twice as many of them. As I found out, this only happens when I try to write something to the database, and regardless of whether the attempt was successful, the data goes to my NSFetchRequestResult. What is the reason for this behavior?

DB content now:

ViewController:

I'm currently developing an application using SwiftUI.

I want to reload data from CoreData in a widget to update newer data every when I close a host App.

But in my codes, the data doesn't get reloaded...

How could I solve that?

TimerApp.swift (Host APP)

I started using CoreData for the first time today, but keep getting this bug.

Thread 1: "An NSManagedObject of class 'MenuRPG.Inventory' must have a valid NSEntityDescription."

However, I'm not really sure how I could fix this.

• Changing Entity module to Current Product Module
• Checking Entity name and class name
• Deleting my Entity and remaking it

But every time I try to add new info into my datamode, my app crashes and shows that error.

I'm calling a @FetchRequest inside of the AdminView struct, where I wish to present the data inside of a List using a ForEach. I'm Requesting all User entity data but when I run the app, the list shows my 2 existing entry results but it also shows about 40 entries that default to the Optional String "TEST" for some reason.

I'm trying to understand how I can get the List to only show the two User Entries without showing the default String in the list.

Much appreciated!

Here is the relevant code:

The problem has been solved by 'hackingwithswift' website

Just follow the steps on the link! "https://www.hackingwithswift.com/books/ios-swiftui/one-to-many-relationships-with-core-data-swiftui-and-fetchrequest"

original ask

I would like to use elements of [relationship]
But whatever I try, it doesn't work..
There is something, what I missed and, sadly I don't know what that would be until now :/

First of all, I want to show my core data model and code.

Core Data Model Image

Entity: Page, Attribute: name(String), relationship: toCard
Entity: Card, Attribute: title(String), price(Double), relationship: toPage

Scenario: Page has multiple cards
One to Many (One page to many cards)

I get nil error since I changed my project to use 'objectWillChange.send()'. Because I needed to update the view manually since it doesn't update itself for custom carousel view(because of core data?).

If I write "1" and tap the next button(NavigationLink)

Console log
page.name: 1
catch error: nilError

Here is the codes.

AddPage Class

I was following an introductory tutorial for using the KDE Framework and ran into problems when compiling. The code is the same as in the tutorial. The compiler outputs:

fatal error: KXmlGuiWindow: No such file or directory

My first thought was that I am simply missing a package so I used apt-cache search to search for kxml and installed libkf5xmlgui-dev. Despite that the error persists. I could not references to this error anywhere online. Has the import path been changed? Is another package required?

I am running Kubuntu 20.04.

I previously had to install other packages for compiling the "Hello World" program that did not yet include KXmlGuiWindow, but when I had installed them everything worked fine.

Edit: find /usr -name KXmlGuiWindow gave me the output /usr/include/KF5/KXmlGui/KXmlGuiWindow. I use Atom for my code editor so I compile the program from a terminal by running the commands given in the tutorial which is cmake .. && make (from a build directory in the project's root directory).

The full output pf that command is

I have a CoreData ManagedObject type Event with the properties name:Sting and date:Date.

I want to fetch all EventObject, with the name containing a filter. If more than one object with the same name matches the filter, only the object with the latest date should be returned.

Just to clarify what I want. In a table based approach I would query in SQL like:

I have two nib files each with its own window populated by data from the same Core Data Managed Object Context (MOC) but each bound to a different array-controller. The problem is that when I delete a data object in one of the window's array-controller, it persists in the other window's array-controller even after saving the common MOC and restarting the program. To permanently remove the unwanted data object, I must remove it at each window separately. This doesn't seem the way Core Data should work. Shouldn't array controllers using the same MOC have a common source of persistent data?