如何在groovy / grails中为嵌套对象创建条件? [英] How to create criteria in groovy/grails for nested object?

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问题描述

我需要帮助创建嵌套对象的hibernate标准。例如:

I need help on creating hibernate criteria for nested object. For example :

class office{
    Integer id;
    OfficeDetails cmdData ;
}

class OfficeDetails {
    Integer id;
    Region region;

}

class Region {
    Integer id;
    Integer regionNum;
}

现在,我从服务类(officeService) :

Now, from the service class ( officeService) I am trying to pull up all of the offices that matches a certain region as :

List<Office> findAllByRegion( Integer regionNumber){
    def criteria =  {  eq ( 'cmdData.region.regionNum', regionNumber ) }
    def allOfficesInTheRegion =  Office.findAll(criteria)

    return allOfficesInTheRegion
}

总是收到异常:org.hibernate.QueryException:无法解析属性:
我需要找出正确的方式来为这个查询创建标准。任何人都可以帮忙吗?

Always getting exception :"org.hibernate.QueryException: could not resolve property:" I need to find out right way to create criteria for this query.Can anyone help?

推荐答案

根据用户指南的条件部分,查询关联:

See "querying associations" under the criteria section of the user guide:

def criteria = {
  cmdData {
    region {
      eq('regionNum', regionNumber)
    }
  }
}

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