问题

我有一个Job模型，其中包含以下字段：

`@Persisted var assigned: Person?`

Person模型：

```swift
class Person: Object, Identifiable {
    
    var id: ObjectId { _id }
    
    @Persisted(primaryKey: true) var _id: ObjectId
    @Persisted var name: String = ""
    
    convenience init(name: String) {
       self.init()
       self.name = name
    }
    
}

我有一个SwiftUI选择器，允许选择一个人，然后将其保存到Job模型。这在创建时运行良好，但在更新时我收到以下错误：

Terminating app due to uncaught exception 'RLMException', reason: 'Can't set object of type 'Person' to property of type 'Person'

这似乎毫无道理，因为错误本身表明数据类型是相同的。我已经将它们都打印出来，它们是相同的。这里发生了什么？

我尝试过显式转换为Person。我确信我只需将字段设置为新的Person记录即可。

<details>
<summary>英文:</summary>

I have a Job model with the following field:

`@Persisted var assigned: Person?`

Person Model:

class Person: Object, Identifiable {

var id: ObjectId { _id }

@Persisted(primaryKey: true) var _id: ObjectId
@Persisted var name: String = ""

convenience init(name: String) {
   self.init()
   self.name = name
}

}

I have a SwiftUI picker to allow a person to be selected, then it's saved to the Job model. This works fine on create, but on update I get the following error:

`Terminating app due to uncaught exception 'RLMException', reason: 'Can't set object of type 'Person' to property of type 'Person'`

Which doesn't seem to make sense as the error itself states the DataTypes are the same. I have printed them both out and they're identical. What is going on here?


I have tried explicitly casting to person. I'm sure I should just be able to set the field to a new person record.

</details>


# 答案1
**得分**: 1

我搞定了。我从我用来填充Picker的@ObservedResults中获取了所选的Person对象：

```swift
@ObservedResults(Person.self) private var people

我将其更改为从现有的Jobs对象获取realm，然后使用该realm实例运行查询以获取Person记录。然后，将此结果添加到Jobs对象中，没有错误。

@ObservedResults(Person.self) private var people