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

2022-08-31 20:05:50

我有HQL,我试图获取没有分类的工件(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]);

每当我运行时,我都会收到错误

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"
    }
}

您可以参考我以前遇到的问题,以了解我到底在尝试执行任务1任务2


答案 1

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_id,但分类类没有名为“artifact_id”的属性。若要修复此问题,请在 HQL 中使用类属性。

SELECT artifactId FROM Classification

答案 2

当DTO(数据传输对象)缺少关键字“new”时,有时会发生这种情况。


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