使用JPA和Hibernate插入记录时重复键

时间：2015-03-05 16:09:36

标签： java hibernate postgresql jpa

美好的一天。我在开始编程之前正在测试我的数据库。在此测试中，我有四个实体：员工，产品， SaleBill 和 SaleBilsDetail 。

ER很简单（我还不能放图像）：

http://i.imgur.com/ZegrAuO.png

比林斯的过程是这样的：

  • 每个销售账单由一名员工制作。
  • 每张销售单都有很多细节。
  • 每个销售单详细信息都有一个产品。

员工 

import java.io.Serializable;

import javax.persistence.*;

import java.util.Date;


@Entity
@Table(name="employees")
@NamedQuery(name="Employee.findAll", query="SELECT e FROM Employee e")
public class Employee implements Serializable {
    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    @Column(name="id_employee")
    private Integer idEmployee;

    private String address;

    @Temporal(TemporalType.DATE)
    @Column(name="birth_date")
    private Date birthDate;

    @Temporal(TemporalType.DATE)
    @Column(name="created_at")
    private Date createdAt;

    @Column(name="dni", columnDefinition="bpchar")
    private String dni;

    private String email;

    private String names;

    @Column(name="state", columnDefinition="bpchar")
    private String state;

    private String surnames;

    @Temporal(TemporalType.DATE)
    @Column(name="updated_at")
    private Date updatedAt;

    public Employee() {
    }

    public Integer getIdEmployee() {
        return this.idEmployee;
    }

    public void setIdEmployee(Integer idEmployee) {
        this.idEmployee = idEmployee;
    }

    public String getAddress() {
        return this.address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public Date getBirthDate() {
        return this.birthDate;
    }

    public void setBirthDate(Date birthDate) {
        this.birthDate = birthDate;
    }

    public Date getCreatedAt() {
        return this.createdAt;
    }

    public void setCreatedAt(Date createdAt) {
        this.createdAt = createdAt;
    }

    public String getDni() {
        return this.dni;
    }

    public void setDni(String dni) {
        this.dni = dni;
    }

    public String getEmail() {
        return this.email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getNames() {
        return this.names;
    }

    public void setNames(String names) {
        this.names = names;
    }

    public String getState() {
        return this.state;
    }

    public void setState(String state) {
        this.state = state;
    }

    public String getSurnames() {
        return this.surnames;
    }

    public void setSurnames(String surnames) {
        this.surnames = surnames;
    }

    public Date getUpdatedAt() {
        return this.updatedAt;
    }

    public void setUpdatedAt(Date updatedAt) {
        this.updatedAt = updatedAt;
    }


}

产品 

import java.io.Serializable;

import javax.persistence.*;

import java.math.BigDecimal;
import java.util.Date;


@Entity
@Table(name="products")
@NamedQuery(name="Product.findAll", query="SELECT p FROM Product p")
public class Product implements Serializable {
    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    @Column(name="id_product")
    private Integer idProduct;

    @Temporal(TemporalType.DATE)
    @Column(name="created_at")
    private Date createdAt;

    private String description;

    @Column(name="id_category")
    private Integer idCategory;

    private String name;

    private BigDecimal price;

    @Column(name="state", columnDefinition="bpchar")
    private String state;

    private Short stock;

    @Temporal(TemporalType.DATE)
    @Column(name="updated_at")
    private Date updatedAt;

    public Product() {
    }

    public Integer getIdProduct() {
        return this.idProduct;
    }

    public void setIdProduct(Integer idProduct) {
        this.idProduct = idProduct;
    }

    public Date getCreatedAt() {
        return this.createdAt;
    }

    public void setCreatedAt(Date createdAt) {
        this.createdAt = createdAt;
    }

    public String getDescription() {
        return this.description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public Integer getIdCategory() {
        return this.idCategory;
    }

    public void setIdCategory(Integer idCategory) {
        this.idCategory = idCategory;
    }

    public String getName() {
        return this.name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public BigDecimal getPrice() {
        return this.price;
    }

    public void setPrice(BigDecimal price) {
        this.price = price;
    }

    public String getState() {
        return this.state;
    }

    public void setState(String state) {
        this.state = state;
    }

    public Short getStock() {
        return this.stock;
    }

    public void setStock(Short stock) {
        this.stock = stock;
    }

    public Date getUpdatedAt() {
        return this.updatedAt;
    }

    public void setUpdatedAt(Date updatedAt) {
        this.updatedAt = updatedAt;
    }


}

SaleBill 

import java.io.Serializable;

import javax.persistence.*;

import java.util.Date;
import java.util.List;


@Entity
@Table(name="sale_bills")
@NamedQuery(name="SaleBill.findAll", query="SELECT s FROM SaleBill s")
public class SaleBill implements Serializable {
    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    @Column(name="id_sale_bill")
    private Integer idSaleBill;

    @Column(name="company_name")
    private String companyName;

    @Column(name="company_ruc", columnDefinition="bpchar")
    private String companyRuc;

    @Temporal(TemporalType.DATE)
    @Column(name="sale_date")
    private Date saleDate;

    @Column(name="state", columnDefinition="bpchar")
    private String state;

    @ManyToOne(/*fetch = FetchType.EAGER,*/ optional=false)
    @JoinColumn(name="id_employee")
    private Employee employee;

    @OneToMany(cascade = CascadeType.ALL, /*fetch = FetchType.EAGER,*/ targetEntity = SaleBillsDetail.class)
    @JoinColumn(name="id_sale_bill_details")
    private List<SaleBillsDetail> saleBillsDetails;

    public SaleBill() {
    }

    public Integer getIdSaleBill() {
        return this.idSaleBill;
    }

    public void setIdSaleBill(Integer idSaleBill) {
        this.idSaleBill = idSaleBill;
    }

    public String getCompanyName() {
        return this.companyName;
    }

    public void setCompanyName(String companyName) {
        this.companyName = companyName;
    }

    public String getCompanyRuc() {
        return this.companyRuc;
    }

    public void setCompanyRuc(String companyRuc) {
        this.companyRuc = companyRuc;
    }

    public Date getSaleDate() {
        return this.saleDate;
    }

    public void setSaleDate(Date saleDate) {
        this.saleDate = saleDate;
    }

    public String getState() {
        return this.state;
    }

    public void setState(String state) {
        this.state = state;
    }

    public Employee getEmployee() {
        return this.employee;
    }

    public void setEmployee(Employee employee) {
        this.employee = employee;
    }

    public List<SaleBillsDetail> getSaleBillsDetails() {
        return this.saleBillsDetails;
    }

    public void setSaleBillsDetails(List<SaleBillsDetail> saleBillsDetails) {
        this.saleBillsDetails = saleBillsDetails;
    }

    public SaleBillsDetail addSaleBillsDetail(SaleBillsDetail saleBillsDetail) {
        getSaleBillsDetails().add(saleBillsDetail);
        saleBillsDetail.setSaleBill(this);

        return saleBillsDetail;
    }

    public SaleBillsDetail removeSaleBillsDetail(SaleBillsDetail saleBillsDetail) {
        getSaleBillsDetails().remove(saleBillsDetail);
        saleBillsDetail.setSaleBill(null);

        return saleBillsDetail;
    }

}

SaleBillsDetail 

import java.io.Serializable;
import javax.persistence.*;


@Entity
@Table(name="sale_bills_details")
@NamedQuery(name="SaleBillsDetail.findAll", query="SELECT s FROM SaleBillsDetail s")
public class SaleBillsDetail implements Serializable {
    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    @Column(name="id_sale_bill_details")
    private Integer idSaleBillDetails;

    @Column(name="cuantity", nullable=false)
    private Short cuantity;

    @ManyToOne(/*fetch = FetchType.EAGER,*/ optional=false)
    @JoinColumn(name="id_product")
    private Product product;

    @ManyToOne
    @JoinColumn(name="id_sale_bill")
    private SaleBill saleBill;

    public SaleBillsDetail() {
    }

    public Integer getIdSaleBillDetails() {
        return this.idSaleBillDetails;
    }

    public void setIdSaleBillDetails(Integer idSaleBillDetails) {
        this.idSaleBillDetails = idSaleBillDetails;
    }

    public Short getCuantity() {
        return this.cuantity;
    }

    public void setCuantity(Short cuantity) {
        this.cuantity = cuantity;
    }

    public Product getProduct() {
        return this.product;
    }

    public void setProduct(Product product) {
        this.product = product;
    }

    public SaleBill getSaleBill() {
        return this.saleBill;
    }

    public void setSaleBill(SaleBill saleBill) {
        this.saleBill = saleBill;
    }

}

测试 

import java.util.ArrayList;
import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.persistence.Persistence;

import org.jboss.logging.Logger;

public class Test {

    @SuppressWarnings("unchecked")
    public static void main(String[] args) {
        EntityManagerFactory emf = Persistence
                .createEntityManagerFactory("BillingTest");
        EntityManager em = null;
        EntityTransaction tx = null;
        final Logger logger = Logger.getLogger(Test.class.getName());

        try {
            em = emf.createEntityManager();
            tx = em.getTransaction();
            tx.begin();

            List<Product> products = em.createQuery("SELECT p FROM Product p")
                    .getResultList();
            List<Employee> employees = em.createQuery(
                    "SELECT e FROM Employee e").getResultList();

            SaleBill sale = new SaleBill();
            sale.setCompanyName("Centro de entrenamiento animal REX E.I.R.L");
            sale.setCompanyRuc("04844013110");
            sale.setSaleDate(new java.util.Date());
            sale.setState("1");
            sale.setEmployee(employees.get(0));

            SaleBillsDetail saleDetail = new SaleBillsDetail();
            List<SaleBillsDetail> details = new ArrayList<>();

            saleDetail.setSaleBill(sale);
            saleDetail.setProduct(products.get(0));
            saleDetail.setCuantity(Short.valueOf(3 + ""));
            details.add(saleDetail);

            saleDetail = new SaleBillsDetail();
            saleDetail.setSaleBill(sale);
            saleDetail.setProduct(products.get(1));
            saleDetail.setCuantity(Short.valueOf(5 + ""));
            details.add(saleDetail);

            sale.setSaleBillsDetails(details);
            em.persist(sale);
            em.flush();
            tx.commit();
        } catch (Exception ex) {
            logger.warn(ex.getMessage());
            System.exit(0);
        } finally {
            if(em != null) em.close();
            if(emf != null) emf.close();
        }

    }

}

异常消息：

INFO: HHH000037: Columns: [id_product, id_sale_bill_details, id_sale_bill, cuantity]
Hibernate: select product0_.id_product as id_produ1_1_, product0_.created_at as created_2_1_, product0_.description as descript3_1_, product0_.id_category as id_categ4_1_, product0_.name as name5_1_, product0_.price as price6_1_, product0_.state as state7_1_, product0_.stock as stock8_1_, product0_.updated_at as updated_9_1_ from products product0_
Hibernate: select employee0_.id_employee as id_emplo1_0_, employee0_.address as address2_0_, employee0_.birth_date as birth_da3_0_, employee0_.created_at as created_4_0_, employee0_.dni as dni5_0_, employee0_.email as email6_0_, employee0_.names as names7_0_, employee0_.state as state8_0_, employee0_.surnames as surnames9_0_, employee0_.updated_at as updated10_0_ from employees employee0_
Hibernate: insert into sale_bills (company_name, company_ruc, id_employee, sale_date, state) values (?, ?, ?, ?, ?)
Hibernate: insert into sale_bills_details (cuantity, id_product, id_sale_bill) values (?, ?, ?)
Hibernate: insert into sale_bills_details (cuantity, id_product, id_sale_bill) values (?, ?, ?)
Hibernate: update sale_bills_details set id_sale_bill_details=? where id_sale_bill_details=?
Hibernate: update sale_bills_details set id_sale_bill_details=? where id_sale_bill_details=?
mar 05, 2015 10:40:40 AM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
WARN: SQL Error: 0, SQLState: 23505
mar 05, 2015 10:40:40 AM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
ERROR: ERROR: duplicate key violates unique constraint «pk_sale_bill_details»
  Detail: Key is already exists (id_sale_bill_details)=(14).
mar 05, 2015 10:40:40 AM org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl release
INFO: HHH000010: On release of batch it still contained JDBC statements
mar 05, 2015 10:40:40 AM com.company.billing.model.entities.Test main
WARN: org.hibernate.exception.ConstraintViolationException: could not execute statement

我不明白为什么更新句子：update sale_bills_details设置id_sale_bill_details =？其中id_sale_bill_details =？

感谢您的阅读。我很感激任何帮助。

1 个答案:

答案 0 :(得分：0)

删除@JoinColumn并在mappedBy课程中添加SaleBill：

@OneToMany(cascade = CascadeType.ALL,
           /*fetch = FetchType.EAGER,*/
           targetEntity = SaleBillsDetail.class,
           mappedBy="saleBill")
private List<SaleBillsDetail> saleBillsDetails;

@OneToMany（所以@ManyToOne）映射应仅由关系的一方管理。
通过在mappedBy中使用 saleBill ，您告诉Hibernate此关系的所有者是 SaleBillsDetail 类中包含的 saleBill 字段（即从 saleBillsDetails 字段类型中扣除，即List<SaleBillsDetail>）。你只在@Many方面使用@JoinColumn。

在此处阅读更多相关信息：
Can someone please explain mappedBy in hibernate?

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