未映射休眠表

Question

我有实体

@Entity
@Table(
        name = SomeEntity.TABLE_NAME,
        uniqueConstraints = {@UniqueConstraint(columnNames = {"first", "second"})}
)
public class SomeEntity extends SomeSuperEntity {
    public static final String TABLE_NAME = "SomeEntity";

    public SomeEntity() {
    }

    public SomeEntity(String first, String second, Integer third) {
        super(first, second, third);
    }
}

此实体的超类

@MappedSuperclass
public abstract class SomeSuperEntity extends SomeSuperAbstractEntity {
    @Column(nullable = false)
    private String first;
    @Column(nullable = false)
    private String second;

    protected SomeSuperEntity () {
    }

    protected SomeSuperEntity (String first, String second, Integer third) {
        super(third);
        this.first= first;
        this.second= second;
    }
}

第二超类

@MappedSuperclass
public abstract class SomeSuperAbstractEntity {
    @Column(nullable = false)
    private Integer third;

    protected SomeSuperAbstractEntity () {
    }

    protected SomeSuperAbstractEntity (Integer third) {
        this.third= third;
    }
}

而且我有这2种方法，首先-用于查找实体

public <T extends SomeSuperEntity > Optional<T> findByFirstAndSecond(String first, String second, Class<T> tClass) {
        String hql = String.format("FROM %s E WHERE E.first = :first AND E.second = :second", getTable(tClass));
        return jpaApi.em().createQuery(hql, tClass)
                .setParameter("first", first)
                .setParameter("second", second)
                .getResultList().stream().findAny();
    }

第二个获取实体名称到hql

private String getTable(Class<? extends SomeSuperEntity > tClass) {
    if (tClass.equals(SomeEntity .class)) {
        return SomeEntity.TABLE_NAME;
    }
    return null;
}

当我尝试调用findByFirstAndSecond（“ 1”，“ 2”，SomeEntity.class）时，出现错误

[[错误] ciSomeMethod-错误：org.hibernate.hql.internal.ast.QuerySyntaxException：未映射SomeEntity [FROM SomeEntity E WHERE E.first =：first AND E.second =：second]]] >

我有实体@Entity @Table（name = SomeEntity.TABLE_NAME，uniqueConstraints = {@UniqueConstraint（columnNames = {“ first”，“ second”}）}））公共类SomeEntity扩展了...

Answer 1

您是否已定义要在应用程序上下文中扫描的软件包？