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我试图在Google App Engine数据存储区(本地测试系统)中存储带有嵌入实体Range
的实体Job
。当我坚持一个新的实体时,我可以看到嵌入实体的属性是持久的。但是,如果我通过Id或查询加载实体,范围属性为空。嵌入式实体未加载
@PersistenceCapable
public class Job {
// embedded entity
@PersistenceCapable
@EmbeddedOnly
public static class Range {
@Persistent
private long start;
@Persistent
private long length;
public long getLength() {
return this.length;
}
public void setStart(long start) {
this.start = start;
}
public long getStart() {
return start;
}
}
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key key;
@Persistent
@Embedded
private Range range;
// getters and setters ...
}