合并

Question

我有一个2列组成关系的两个表，我的第一个实体是：

public class NfCabeca implements java.io.Serializable { 

    @Id 
    @SequenceGenerator(name = "nf_cabeca_sequencial_seq", sequenceName = "nf_cabeca_sequencial_seq", schema = "mobile", allocationSize = 1, initialValue = 1) 
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "nf_cabeca_sequencial_seq") 
    @Column(name = "sequencial", insertable = false, updatable = false) 
    private long sequencial; 

    @ManyToOne 
    @NotFound(action=NotFoundAction.IGNORE) 
    @MapsId("nf_cabeca_id") 
    @JoinColumns({ 
     @JoinColumn(name = "sequencial" , referencedColumnName="nf_cabeca"), 
     @JoinColumn(name= "protocolo", referencedColumnName="protocolo")}) 
    private NFeProtocolo protocolo; 

    @OneToMany(mappedBy = "nf_cabeca_id", cascade = CascadeType.ALL) 
    private List<NFeProtocolo> protocolos = new ArrayList<NFeProtocolo>(); 

public void setProtocolo(NFeProtocolo protocolo) { 
    this.protocolo = protocolo; 
    protocolos.remove(protocolo); 
    protocolo.setNf_cabeca_id(this); 
    protocolos.add(protocolo); 
    } 
} 

我的第二个实体是：

public class NFeProtocolo implements Serializable { 



/** 
    * 
    */ 
    private static final long serialVersionUID = 2092981840170296102L; 

    @Id 
    @ManyToOne 
    @JoinColumn(name = "nf_cabeca" , referencedColumnName="sequencial", updatable = false) 
    private NfCabeca nf_cabeca_id; 

    @Id 
    @Column(name = "protocolo", length = 100) 
    private String protocolo; 

    @Column(name = "operacao", length = 15, nullable = false) 
    @Enumerated(EnumType.STRING) 
    private NFeProtocoloOperacao operacao; 

    @Temporal(TemporalType.TIMESTAMP) 
    @Column(name = "data_hora", length = 29, nullable = false) 
    private Date dataHora; 

    @Column(name = "status", length = 10) 
    private String status; 
} 

的问题是当我设置NFeProtocolo内NFCabeca

NFeProtocolo nFeProtocolo = new NFeProtocolo(protocolo, operacao, dataProtocolo, status); 
nFeProtocolo.setNf_cabeca_id(nf); 

nf.setProtocolo(nFeProtocolo); 
merge(nf); 

我得到一个错误：

error message saying the column nf_cabeca cannot be set to null

真的不行，但是我在设置nf_cabeca值时做错了什么？ 当观看对象nFeProtocolo时，它没有暴露nf_cabeca_id。

Protocolos内容：

[NFeProtocolo [protocolo=333170000339533, operacao=CRIACAO, dataHora=Wed Aug 09 09:19:11 BRT 2017, status=100]]

为什么不设置外nf_nf_cabeca_id？

Answer 1

的解决方案是创建一个

public void setProtocolos(List<NFeProtocolo> protocolos) { 
    this.protocolos = protocolos; 
} 

在NfCabeca和NfeProtocolo改变nf_cabeca_id到

@ManyToOne 
@JoinColumn(name = "nf_cabeca") 
private NfCabeca nf_cabeca_id;