App Engine JDO Persistent类从com.google.appengine.api.datastore.Key迁移到Long
16lz
2021-01-22
I've been working to get an app that runs on GAE to support other platforms like a single instance of a Jetty Server.
我一直在努力获得一个在GAE上运行的应用程序,以支持其他平台,例如Jetty Server的单个实例。
A Persistent JDO class with a primary key defined like this:
一个持久的JDO类,其主键定义如下:
@PersistenceCapable(identityType = IdentityType.APPLICATION, detachable = "false")
@Inheritance(strategy = InheritanceStrategy.SUBCLASS_TABLE)
public abstract class Foo implements Bar {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
protected Key key;
The key is a com.google.appengine.api.datastore.Key;
关键是com.google.appengine.api.datastore.Key;
Short of doing a data migration, is it possible to somehow convert this field to a Long or something that's supported in other platforms like mySQL and not needing to use an app-engine library?
没有进行数据迁移,是否有可能以某种方式将此字段转换为Long或其他平台(如mySQL)支持的内容,而不需要使用app-engine库?
1 个解决方案
#1
0
ok looks like it's possible to just convert it to a string and i'm good to go.
好吧看起来可以将它转换为字符串,我很高兴。
@PersistenceCapable(identityType = IdentityType.APPLICATION, detachable = "false")
@Inheritance(strategy = InheritanceStrategy.SUBCLASS_TABLE)
public abstract class EntityStore implements Entity {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
protected String key;