在Swift中保存CoreData多对数关系 [英] Saving CoreData to-many relationships in Swift

问题描述

我有一对多的关系，如下所示：

I have a one-to-many relationship that looks like so,

我在一个文件中设置了我的模型类以匹配：

I've set up my model classes in a file to match:

import CoreData
import Foundation

class Board: NSManagedObject {
    @NSManaged var boardColor: String
    @NSManaged var boardCustomBackground: AnyObject?
    @NSManaged var boardID: String
    @NSManaged var boardName: String
    @NSManaged var lists: NSSet
}

class List: NSManagedObject {
    @NSManaged var listID: String
    @NSManaged var listName: String
    @NSManaged var board: Board
}

因为我从多个JSON端点提取数据，我必须从我的板子单独保存我的列表。 我想要做的是为具有匹配boardID的电路板创建/更新列表。

Because I'm fetching data from multiple JSON endpoints, I have to save my lists seperately from my boards. What I want to do is create/update a list for a board with a matching boardID.

这里是我多次尝试后的位置： / p>

Here's where I am after multiple attempts:

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