没有节点的数据类型：org.hibernate.hql.internal.ast.tree.IdentNode HQL

我有HQL，我试图获得没有分类的工件（当活动为0时）

artifacts = Artifact.findAll("FROM Artifact WHERE id NOT IN ( SELECT artifact_id FROM Classification WHERE active = 1) AND document_id = :docid",[docid:document.id], [max:limit, offset:startIndex]); 

每当我跑，我得到错误

 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，以了解我究竟想要做什么Quest 1和Quest 2

Answer 1

SQL查询使用列名，而HQL查询使用Class属性。 您正在从Classification中选择artifact_id，但Classification类没有名为’artifact_id’的属性。 要修复它，请在HQL中使用class属性。

 SELECT artifactId FROM Classification