我们如何创建一个编码字符串的父键?例如:类型编码字符串的父键?
class Parent {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
@Extension(vendorName="datanucleus", key="gae.encoded-pk", value="true")
private String mEncKey;
}
class Child {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
@Extension(vendorName="datanucleus", key="gae.encoded-pk", value="true")
private String mEncKey;
// In the doc examples, they have Key as the type here.
@Persistent
@Extension(vendorName="datanucleus", key="gae.parent-pk", value="true")
private String mParentEncKey;
}
亲爱的,我不知道如何使mParentEncKey编码字符串类型,因为已被使用的“钥匙”的标签?我需要类似的东西?:
key="gae.parent-pk.encoded-pk"
不确定 - 这是可能的吗?
感谢