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我在 Grails 中有以下域模型，我试图对其运行查询，但它失败了，说它是一个无效的查询。

查询如下所示：

  StringBuilder queryBuf = new StringBuilder();
    queryBuf.append("select rr.role from ReportRole rr ");
    def newroles = ReportRole.findAll(queryBuf)

而且，域看起来像这样：

package auth

import java.util.Date
import auth.Report
import auth.Role

class ReportRole {
Long id
Report report
Role role
Date dateCreated
Date lastUpdated
Person createdBy

static mapping = {
    table 'CIT_RM_Report_Role'
    version false
    role joinTable:[name:'AU_ROLE_DESCR', key:'role_id', column:'id']
    columns {
        id column:'report_role_id'
        report column:'report_id'
        createdBy column:'created_by'
        dateCreated column:'create_date'
        lastUpdated column:'last_updated'

        }
    }
}

package auth;
class Role {
static hasMany = [people: Person]
Long id;
String authority;
String description;
static mapping = {
    table 'AU_ROLE_DESCR'
    people joinTable:[name:'AU_PERSON_ROLE', key:'AUTHORITY_ID', column:'PERSON_ID']
    version false;
    }
}

谁能告诉我为什么这是无效的。我有一些类似的域，这样的查询可以工作。

4

1 回答 1

2

我想findAll只能返回一个域列表，而不是任何关联/元素。您可以更好地使用executeQuery来实现您所寻求的：

ReportRole.executeQuery("select rr.role from ReportRole rr")
于 2013-10-17T14:22:38.957 回答