Question

DB模式1对象看起来像这样：

open class LicenseAgreementEntity(
    @PrimaryKey
    var licenseAgreementID: String = UUID.randomUUID().toString(),
    var version: String = "",
    var acceptAgreementDate: String = "",
    var acceptAgreementStatus: String = AcceptAgreementStatus.ACCEPTED.name

) : RealmObject()

在数据库模式2中，对象将如下所示：

open class LicenseAgreementEntity(
    @PrimaryKey
    var accountID: String = UUID.randomUUID().toString(),
    var version: String = "",
    var acceptAgreementDate: String = "",
    var acceptAgreementStatus: String = AcceptAgreementStatus.ACCEPTED.name
) : RealmObject()

我的迁移代码如下

realm?.let { transactionRealm ->
            val schema = transactionRealm.schema
            val licenseAgreementSchema = schema.get(TABLE_LICENSE_AGREEMENT_ENTITY) ?: return

            licenseAgreementSchema
                .renameField(FIELD_LICENSE_AGREEMENT_ID, FIELD_ACCOUNT_ID)
                .transform {
                    it.set(FIELD_ACCOUNT_ID, preference.accountID)
                }
        }

问题是在迁移到其他值期间我需要更新该字段。我尝试了添加/删除字段和添加/删除主键的不同变体，但看起来变换操作正在破坏它。关于如何重命名主键字段并在迁移中更改其值的任何想法？

例外：

 Caused by: java.lang.IllegalArgumentException: Primary key field 'accountID' cannot be changed after object was created.

如何在迁移中替换Realm for Android中的主字段

0 个答案: