每次执行祖先加载查询时都会添加新实体？

Question

所以每次我执行下面的查询api而不是列出用户创建的所有费用时，它会创建一个新的费用吗？

@ApiMethod(
        name = "getMyExpenses",
        path = "getMyExpenses",
        httpMethod = ApiMethod.HttpMethod.POST
)
public List<Expense> getMyExpenses(final User user) throws UnauthorizedException {
    if (user == null) {
        throw new UnauthorizedException("You need to authorisation");
    }
    String userId = user.getUserId();
    Key<Person> personKey = Key.create(Person.class, userId);
    return ofy().load().type(Expense.class).ancestor(personKey).list();
}

我不确定为什么会这样。任何帮助表示赞赏。

问题可能在于我如何尝试定义父关系？这是我的Expense模型类。

@Entity
public class Expense {
    @Id Long ExpenseId;
    String name;
    @Parent
    Ref<Person> ExpenseCreator;
    int amount;

    private  Expense() {}
    public Expense(Long expenseId, String name, int amount) {
        ExpenseId = expenseId;
        this.name = name;
        this.amount = amount;
    }

    public Long getExpenseId() {
        return ExpenseId;
    }

    public String getName() {
        return name;
    }



    public int getAmount() {
        return amount;
    }


}