IOS中的领域：插入对象后无法更改主键

Question

我是使用 Realm 的新手。我有一些代码：

RLMRealm *realm = [RLMRealm defaultRealm];
            [realm transactionWithBlock:^{
                self.object.objectPrimaryKey = someValue;
            }];

此字符串出现异常：self.object.objectPrimaryKey = someValue;，原因：'Primary key can't be changed after an object is inserted.'

objectPrimaryKey is a primary key. What can I do to fix it?

Answer 1

docs关于主键，主键只能设置一次。

密钥一旦设置就无法更改： Override Object.primaryKey() to set the model’s primary key. Declaring a primary key allows objects to be looked up and updated efficiently and enforces uniqueness for each value. Once an object with a primary key is added to a Realm, the primary key cannot be changed.