迁移多个领域 - 领域版本大于模式版本异常

时间:2015-11-20 14:14:32

标签: ios realm

为什么会抛出此异常(当我尝试迁移多个领域时)?

bool ObjectStore::is_schema_at_version(Group *group, uint64_t version) {
    uint64_t old_version = get_schema_version(group);
    if (old_version > version && old_version != NotVersioned) {
        throw ObjectStoreException(ObjectStoreException::Kind::RealmVersionGreaterThanSchemaVersion,
                                   {{"old_version", to_string(old_version)}, {"new_version", to_string(version)}});
    }
    return old_version != version;
}

1 个答案:

答案 0 :(得分:2)

首先,我需要以正确的方式实例化realmconfig。

RLMRealmConfiguration *someOtherConfig = [[RLMRealmConfiguration defaultConfiguration] copy];

而不是:

RLMRealmConfiguration *someOtherConfig = [[RLMRealmConfiguration alloc] init];

我需要删除其他schemaVersion配置和冗余迁移块:

config.schemaVersion = migrationVersion;

在执行实际迁移之前:

[RLMRealm migrateRealm:someOtherConfig];