spring mvc model error mapping

Question

我正在使用spring mvc并在2个表之间创建一对多的关系。我有2个型号：

1. ContractHeader 1：很多
2. ContractEntitlement many：1

ContractHeader.java

@Entity
@Table(name = "CONTRACT_HEADER")
public class ContractHeader {

    @Id
    @Column(name = "id")
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;

    @OneToMany(mappedBy = "contractHeader", cascade = CascadeType.ALL)
    private List<ContractEntitlement> contractEntitlements;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }


    public List<ContractEntitlement> getContractEntitlements() {
        return contractEntitlements;
    }

    public void setContractEntitlements(List<ContractEntitlement> contractEntitlements) {
        this.contractEntitlements = contractEntitlements;
    }

}

ContractEntitlement.java

@Entity
@Table(name = "CONTRACT_ENTITLEMENT")
public class ContractEntitlement {

    @Id
    @Column(name = "id")
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;

    @ManyToOne
    @JoinColumn(name = "id")
    private ContractHeader contractHeader; 

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public ContractHeader getContractHeader() {
        return contractHeader;
    }

    public void setContractHeader(ContractHeader contractHeader) {
        this.contractHeader = contractHeader;
    }

}

我在eclipse sts中发布时遇到错误：

deploy is failing=Error occurred during deployment: Exception while loading the app : java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: org.apache.catalina.LifecycleException: org.hibernate.MappingException: Repeated column in mapping for entity: com.at.ccts.model.ContractEntitlement column: id (should be mapped with insert="false" update="false"). Please see server.log for more details.

有什么想法吗？

Answer 1

在您的实体 ContractHeader 中，您的映射会为表提供两列名称为 id 的列，更改@JoinColumn中的name属性

@ManyToOne
@JoinColumn(name = "idContractHeader")
private ContractHeader contractHeader; 

Answer 2

你应该使用这个链接： -

@OneToMany(mappedBy = "ContractHeader", cascade = CascadeType.ALL)
private List<ContractEntitlement> contractEntitlements;