使用JPA NamedQuery获取结果列表

Question

我想使用如下查询获取结果列表：

SELECT x FROM XTreinamentosOrc x WHERE x.codEduca NOT IN (SELECT DISTINCT y.codCurso y FROM XRlz y WHERE y.matricula = :matricula)

我在它的实体 class 中使用了它，但后来我得到了异常：

Caused by: javax.el.PropertyNotFoundException: The class 'br.com.bb.upb.diage.atb_treinamentos.entities.XTreinamentosOrc' does not have the property 'matricula'.

matricula字段在用户登录成功后获取。应该通过CDI在NamedQuery中设置来查询数据库。 matricula 字段位于与此处映射的另一个 table 中。

如何在 XRlzConsolidado class 类型的参数矩阵中设置注入的 sessionChave 字符串？

豆子：

@Named(value = "ExtratoBean")
@RequestScoped
public class ExtratoBean implements Serializable {

@EJB
private XTreinamentosOrcFacade xt;

@Inject
@SessionChave
private String sessionChave;

private List<XTreinamentosOrc> xTreinamentosOrcList;

public List<XTreinamentosOrc> getxTreinamentosOrcList() {
    return QueryExtratoTreinamentos();
}

private List QueryExtratoTreinamentos() {
    List<XTreinamentosOrc> extratoTreinamentosOrcList = null;
    XRlzConsolidado x = new XRlzConsolidado();
    x.setMatricula(sessionChave);
    extratoTreinamentosOrcList = xt.findAllTreinamentosByMatricula(x);
    return extratoTreinamentosOrcList;
}
}

有 3 个实体：XRlz、XRlzConsolidado 和 XTreinamentosOrc。

XRlz:

@Entity
@Table(name = "XRlz", catalog = "diage", schema = "atb")
@XmlRootElement
//named queries

public class XRlz implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@Basic(optional = false)
@NotNull
@Column(name = "id")
private Integer id;
@Size(max = 100)
@Column(name = "nome")
private String nome;
@Column(name = "uorPos")
private Integer uorPos;
@Size(max = 100)
@Column(name = "nomeUorPos")
private String nomeUorPos;
@Column(name = "codCurso")
private Integer codCurso;
@Size(max = 100)
@Column(name = "nomeCurso")
private String nomeCurso;
@Column(name = "qtdCursos2015")
private Integer qtdCursos2015;
@Size(max = 10)
@Column(name = "dtConclusao")
private String dtConclusao;
@JoinColumn(name = "matricula", referencedColumnName = "matricula")
@ManyToOne
private XRlzConsolidado matricula;
@JoinColumn(name = "dtRef", referencedColumnName = "id")
@ManyToOne
private XDatas dtRef;

//GETTERS AND SETTERS

public XRlzConsolidado getMatricula() {
    return matricula;
}

public void setMatricula(XRlzConsolidado matricula) {
    this.matricula = matricula;
}

public XDatas getDtRef() {
    return dtRef;
}

public void setDtRef(XDatas dtRef) {
    this.dtRef = dtRef;
}

//equals/hashcode/toString 

}

XRlzConsolidado:

@Entity
@Table(name = "XRlzConsolidado", catalog = "diage", schema = "atb")
@XmlRootElement
// NamedQueries

public class XRlzConsolidado implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @Basic(optional = false)
    @NotNull
    @Size(min = 1, max = 8)
    @Column(name = "matricula")
    private String matricula;
    @Size(max = 100)
    @Column(name = "nome")
    private String nome;
    @Column(name = "uorPos")
    private Integer uorPos;
    @Size(max = 100)
    @Column(name = "nomeuorPos")
    private String nomeuorPos;
    @Column(name = "capacitacaoGestores")
    private Integer capacitacaoGestores;
    @Column(name = "capacitacaoAssessores")
    private Integer capacitacaoAssessores;
    @Column(name = "horas")
    private Integer horas;
    @Column(name = "bemEstar")
    private Integer bemEstar;
    @Column(name = "inovEfic")
    private Integer inovEfic;
    @Column(name = "qtdCursos2015")
    private Integer qtdCursos2015;
    @OneToMany(mappedBy = "matricula")
    private Collection<XRlz> xRlzCollection;

    public XRlzConsolidado() {
    }

    public XRlzConsolidado(String matricula) {
        this.matricula = matricula;
    }

    public String getMatricula() {
        return matricula;
    }

    public void setMatricula(String matricula) {
        this.matricula = matricula;
    }

// getters and setters

    @XmlTransient
    public Collection<XRlz> getXRlzCollection() {
        return xRlzCollection;
    }

    public void setXRlzCollection(Collection<XRlz> xRlzCollection) {
        this.xRlzCollection = xRlzCollection;
    }

    // hashCode()

    @Override
    public boolean equals(Object object) {
        if (!(object instanceof XRlzConsolidado)) {
            return false;
        }
        XRlzConsolidado other = (XRlzConsolidado) object;
        if ((this.matricula == null && other.matricula != null) || (this.matricula != null && !this.matricula.equals(other.matricula))) {
            return false;
        }
        return true;
    }

    // toString
}

XTreinamentosOrc：

@Entity
@Table(name = "XTreinamentosOrc", catalog = "diage", schema = "atb")
@XmlRootElement
@NamedQueries({
@NamedQuery(name = "XTreinamentosOrc.findAll", query = "SELECT x FROM XTreinamentosOrc x"),
@NamedQuery(name = "XTreinamentosOrc.findAllTreinamentosByMatricula", query = "SELECT x FROM XTreinamentosOrc x WHERE x.codEduca NOT IN (SELECT DISTINCT y.codCurso FROM XRlz y WHERE y.matricula = :matricula)")})

public class XTreinamentosOrc implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @Basic(optional = false)
    @NotNull
    @Column(name = "id")
    private Integer id;
    @Basic(optional = false)
    @NotNull
    @Column(name = "codEduca")
    private int codEduca;
    @Size(max = 100)
    @Column(name = "nomeCurso")
    private String nomeCurso;
    @Column(name = "cargaHoraria")
    private Integer cargaHoraria;
    @JoinColumn(name = "tipo", referencedColumnName = "id")
    @ManyToOne(optional = false)
    private XTipo tipo;
    @JoinColumn(name = "segmento", referencedColumnName = "id")
    @ManyToOne(optional = false)
    private XSegmento segmento;
    @JoinColumn(name = "modalidade", referencedColumnName = "id")
    @ManyToOne
    private XModalidade modalidade;
    @JoinColumn(name = "dtRef", referencedColumnName = "id")
    @ManyToOne
    private XDatas dtRef;

    public XTreinamentosOrc() {
    }

    public XTreinamentosOrc(Integer id) {
        this.id = id;
    }

    public XTreinamentosOrc(Integer id, int codEduca) {
        this.id = id;
        this.codEduca = codEduca;
    }

    // hashCode() {

    @Override
    public boolean equals(Object object) {
        if (!(object instanceof XTreinamentosOrc)) {
            return false;
        }
        XTreinamentosOrc other = (XTreinamentosOrc) object;
        if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
            return false;
        }
        return true;
    }
    }

提前致谢。

Answer 1

你能 post 编码 XRlzConsolidado 吗？它可能包含要与 sessionChave 进行比较的字符串字段。您正在将字段 XRlz.matricula 与字符串值进行比较，但它的类型是 XRlzConsolidado

Answer 2

我认为问题出在您的查询名称上。 findAllTreinamentosByMatricula() 是一个属性表达式，只能引用被管理实体的直接属性。 findAllTreinamentosByMatricula 将在 XTreinamentosOrc class 中查找名为 matricula 的属性。当在 XTreinamentosOrc 中找不到属性时，您会得到异常：

Caused by: javax.el.PropertyNotFoundException: The class 'br.com.bb.upb.diage.atb_treinamentos.entities.XTreinamentosOrc' does not have the property 'matricula'.

您需要将查询名称更改为：

@NamedQuery(name = "XTreinamentosOrc.find", query = "SELECT x FROM XTreinamentosOrc x WHERE x.codEduca NOT IN (SELECT DISTINCT y.codCurso FROM XRlz y WHERE y.matricula = :matricula)")})

（对于可接受的格式，我可能会使用方法名称 'find() so you may need to do some more research'）

查看此文档：

http://docs.spring.io/spring-data/jpa/docs/current/reference/html/#repositories.query-methods.query-property-expressions

使用JPA NamedQuery获取结果列表

Using JPA NamedQuery to obtain result list

java

jpa

named-query