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POJPA how to select objects wich has no multiple attributes
 

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  1. POJPA how to select objects wich has no multiple attributes
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    <p>I use hibernate 3.5.4-final. I have two JPA classes. </p> <pre><code> @Entity @Table(name = "SPI_V_OP_OBJ_SUBJECT_VR") public class OpSubject_vr extends PersistenceEntity implements Serializable { private static final long serialVersionUID = 1858749317461707015L; /** id */ @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name = "ID", nullable = false) private Long id; /** name */ @Column(name = "F_NAME") private String f_name; /** type */ @Column(name = "SUBJECT_TYPE") private String subject_type; /** okved */ @ManyToMany @JoinTable(name = "SPI_V_OP_OBJ_SUBJECT_VR_OKVED", joinColumns = {@JoinColumn(name = "OBJECT_ID", referencedColumnName = "ID", nullable = false)}, inverseJoinColumns = {@JoinColumn(name = "SPR_ID", referencedColumnName = "ID", nullable = false)}) private List&lt;OpSprOkved&gt; okved_id_mult = new ArrayList&lt;&gt;(); } </code></pre> <p>and </p> <pre><code>@Entity @Table(name = "SPI_V_OP_SPR_OKVED") public class OpSprOkved extends PersistenceEntity implements Serializable { /** id */ @Id @Column(name = "ID", nullable = false) private Long id; /** code*/ @Column(name = "CODE") private String code; /** name*/ @Column(name = "name") private String name; } </code></pre> <p>Attribute okved_id_mult is multiple. I want to select objects OpSubject_vr with empty attribute okved_id_mult. </p> <p>I tryed</p> <p>select ent from OpSubject_vr ent where okved_id_mult is empty; (hibernate error)</p> <p>select ent from OpSubject_vr ent where okved_id_mult is null; (hibernate error)</p> <p>select distinct ent from OpSubject_vr ent join ent.okved_id_mult i1 where i1.code is null;(return 0 objects)</p>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USAlexander
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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    1. This table or related slice is empty.
    1. CO"(hibernate error)" is not really useful for anyone to be able to help you. The second form is illegal. The third form is not at all getting the data you say that you want. The first form should be fine. So what is the error you are given?
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      1. POJPA how to select objects wich has no multiple attributes
      1. USSteve Ebersole
    2. COin first form i get this error: Caused by: org.hibernate.hql.ast.QuerySyntaxException: okved_id_mult is not mapped [select ent from ru.spi2.irule.javaee.server.models.rfm.operations.domain.objects.OpSubject_vr ent where okved_id_mult is empty]
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      1. POJPA how to select objects wich has no multiple attributes
      1. USAlexander
 

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