IOS领域：插入对象后无法更改主键

Question

我在使用Realm方面有些新知识。我有一些代码：

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

此字符串self.object.objectPrimaryKey = someValue;发生异常，原因为：'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，您只能设置一次主键。

设置密钥后便无法更改： 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.