android - Realm Kotlin 迁移 Android String

Question

找不到答案。我正在尝试迁移 Realm 数据库。需要创建一个包含 2 个字段的 DBRequest 表:Int 和 String

if (oldVersion == 5L) {
    val s = scheme.create("DBRequest")
    s.addField("apiCode", Int::class.java)
}

没关系!但是如果我也尝试添加 String 类型

    s.addField("jsonRequest", String::class.java)

它抛出一个错误:

Caused by: io.realm.exceptions.RealmMigrationNeededException: Migration is required due to the following errors: - Property 'DBRequest.jsonRequest' has been made required.

我不知道怎么解决。我试过这样的事情:

s.addField("jsonRequest", String::class.javaPrimitiveType!!)
-or-
s.addField("jsonRequest", String::class.javaObjectType)

没有任何帮助:(

Answer 1

将此添加到迁移

s
    .addField("jsonRequest", String::class.java)
    .setRequired("jsonRequest", true)