Question

我在Realm中创建了一个模型如下：

 
open class Contact() : RealmObject() {

    @PrimaryKey
    @Required
    open var id: String = ""

    @Required
    @Index
    open var firstName: String = ""
    @Required
    @Index
    open var lastName: String = ""
    @Required
    @Index
    open var fullName: String = ""

    ...
}

更新对象时如何生成fullName？

我知道在CoreData中你可以在调用willSave:_时改变属性。这对Realm有什么用？

我尝试过提供一个getter，但这会破坏RealmObject的行为。

谢谢！

Answer 1

您可以使用custom setters in RealmObjects

@Required
@Index
open var firstName: String = ""
    set(value) {
        field = value
        updateFullName()
    }

@Required
@Index
open var lastName: String = ""
    set(value) {
        field = value
        updateFullName()
    }

private fun updateFullName() {
    fullName = "$firstName $lastName"
}

@Required
@Index
open var fullName: String = ""

将生成的值添加到RealmObject

1 个答案: