Swift Realm 属性“*”已添加到最新的对象模型迁移中

Question

我在 RLMObject 中添加了新的数组属性，并且

public class Student: RLMObject {
    dynamic var id = 0
    dynamic var name = ""
    dynamic var resultList = RLMArray(objectClassName:Result.className())
}

public class Result: RLMObject {
}

错误日志：

由于以下原因，对象类型“学生”需要迁移 错误： - 属性“resultList”已添加到最新的对象模型中。

尝试失败：

let configuration:RLMRealmConfiguration = RLMRealmConfiguration.defaultConfiguration()

migration.enumerateObjects(Student.className()) { oldObject, newObject in
    newObject!["resultList"] = RLMArray(objectClassName: Result.className())
}

编辑：

  let configuration:RLMRealmConfiguration = RLMRealmConfiguration.defaultConfiguration()
    print("Realm db current version: \(configuration.schemaVersion)")
    configuration.schemaVersion = 1
    configuration.migrationBlock = {(migration:RLMMigration, oldSchemaVersion: UInt64) in
        print("Realm db migration start")
        if oldSchemaVersion < 1 {
            print("Schema version: 1 - Rename fields")
            migration.enumerateObjects(Student.className()) { oldObject, newObject in
                newObject!["creationDate"] = oldObject!["createdAt"]
                newObject!["modifiedDate"] = oldObject!["updatedAt"]
            }
        }
        print("Realm db migration finish")
    }
    RLMRealmConfiguration.setDefaultConfiguration(configuration)
    let realm = RLMRealm.defaultRealm()

解决方案：

将您的版本更新为 +1

configuration.schemaVersion += 1

Answer 1

您必须增加您的schemaVersion 并在您的RLMRealmConfiguration 上提供migrationBlock。在那里你可以迁移表。但是在您的特定情况下，您不需要它。可以自动处理属性的添加。你仍然需要一个空块。

let config = RLMRealmConfiguration.defaultConfiguration()
config.schemaVersion = 1
config.migrationBlock = { (migration, oldSchemaVersion) in
    // nothing to do
}
RLMRealmConfiguration.setDefaultConfiguration(config)