Java 节点没有数据类型:org.hibernate.hql.internal.ast.tree.IdentNode hql

Java 节点没有数据类型:org.hibernate.hql.internal.ast.tree.IdentNode hql,java,hibernate,grails,hql,Java,Hibernate,Grails,Hql,在HQL中,我尝试获取没有分类的工件(活动为0时) 每当我运行时,都会出现错误 java.lang.IllegalStateException: No data type for node: org.hibernate.hql.internal.ast.tree.IdentNode \-[IDENT] IdentNode: 'artifact_id' {originalText=artifact_id} 分类定义: class Classification { public st

在HQL中,我尝试获取没有分类的工件(活动为0时)

每当我运行时,都会出现错误

java.lang.IllegalStateException: No data type for node: org.hibernate.hql.internal.ast.tree.IdentNode 
 \-[IDENT] IdentNode: 'artifact_id' {originalText=artifact_id}
分类定义:

class Classification {

    public static final String USER_DEFAULT = "USER"
    public static final String USER_SYSTEM = "SYSTEM"

    TaxonomyNode node
    String artifactId 
    Boolean active
    String createdBy
    String updatedBy
    Date dateCreated
    Date lastUpdated


    static constraints = {
        node nullable:false, blank:false
        artifactId nullable:false, blank:false, unique: ['node']
        active nullable: false, blank: false
        createdBy nullable:false, blank:false
        updatedBy nullable:false, blank:false
    }

    static mapping = {
        id generator:'sequence', params:[sequence:'classification_seq']
        artifactId index: 'classify_by_artifact_node'
        node index: 'classify_by_artifact_node'
        active defaultValue: "1"
    }
}

您可以参考我之前遇到的问题来了解我到底在做什么,并且

SQL查询使用列名,而HQL查询使用类属性。您正在从分类中选择artifact\u id,但分类类没有名为'artifact\u id'的属性。要修复它,请在HQL中使用class属性

SELECT artifactId FROM Classification

当DTO(数据传输对象)缺少关键字“new”时,有时会出现这种情况。

查看分类定义会有所帮助
SELECT artifactId FROM Classification