如何使用JPA存储库实体模型获取密钥和值数据？

Question

我写了一个查询：

select c.ContactID as key,c.ContactName as value 
from com.seismic.crm.model.Contact c inner join c.account ca 
where ca.accountId = :accountId 

并得到以下异常

org.hibernate.QueryException: could not resolve property: 
account of: com.seismic.crm.model.Contact