spring Boot中如何解决sql语法异常和Unknown column 'id'

Question

**** customer Class Model*********   
        @Entity
        @Table(name="customer")
        @NamedQuery(name="Customer.findAll", query="SELECT c FROM Customer c")
        public class Customer implements Serializable {
            private static final long serialVersionUID = 1L;

            @Id
            @GeneratedValue(strategy=GenerationType.AUTO)
            @Column(unique=true, nullable=false)
            private int idCustomer;

            @Column(nullable=false, length=45)
            private String name;


            //bi-directional many-to-one association to Login
            @OneToMany(mappedBy="customer")
            private Set<Login> logins;

            //bi-directional many-to-one association to Transaction
            @OneToMany(mappedBy="customer")
            private Set<Transaction> transactions;

            public Customer() {
            }

            public int getIdCustomer() {
                return this.idCustomer;
            }

            public void setIdCustomer(int idCustomer) {
                this.idCustomer = idCustomer;
            }

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

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

            public Set<Login> getLogins() {
                return this.logins;
            }

            public void setLogins(Set<Login> logins) {
                this.logins = logins;
            }

            public Login addLogin(Login login) {
                getLogins().add(login);
                login.setCustomer(this);

                return login;
            }

            public Login removeLogin(Login login) {
                getLogins().remove(login);
                login.setCustomer(null);

                return login;
            }
        }

****** 登录 Class 型号*********

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

    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    @Column(unique=true, nullable=false)
    private int idLogin;

    @Column(length=45)
    private String password;

    @Column(length=45)
    private String uName;

    //bi-directional many-to-one association to Customer
    @ManyToOne
    @JoinColumn(name="idCustomer", nullable=false)
    private Customer customer;

    public Login() {
    }

    public int getIdLogin() {
        return this.idLogin;
    }

    public void setIdLogin(int idLogin) {
        this.idLogin = idLogin;
    }

    public String getPassword() {
        return this.password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getUName() {
        return this.uName;
    }

    public void setUName(String uName) {
        this.uName = uName;
    }

    public Customer getCustomer() {
        return this.customer;
    }

    public void setCustomer(Customer customer) {
        this.customer = customer;
    }

}

我的控制器方法在数据库中保存登录和客户对象

@RequestMapping(value="/save",method=RequestMethod.POST)public StringsaveCust(
    @ModelAttribute("cust") 
    @Valid Customer cust,
    BindingResult result,
    @RequestParam("pass") String pass , 
    @RequestParam("user") String user){


                if (result.hasErrors()) {
                    return "redirect:/customer";
                } 

                cust = custRepo.save(cust);//using spring DAO to save the object
                Login log = new Login(); //creaing a new login
                log.setUName(user); //setting the user
                log.setPassword(pass); //setting the pass
                log.setCustomer(cust); //setting the customer
                logRepository.save(log); //doesnt save the login . bt customer is saved 
                return "success";

            }

我已经提交了我在我的 springBoot 应用程序中使用的两个模型类。在我的数据库中有 2 个表 customer 和 login，其中 login customerID 是一个外键。当我尝试将我的 2 类保存在数据库中时，客户已保存而且我的登录名没有保存。我收到一条错误消息

Unknown column 'id_customer' in 'field list'

我在项目中使用 thymeleaf，我在浏览器中看到的错误是

SQLGrammarException:

我想我在控制器方法中做错了什么。谁能解释一下如何解决这个问题。

Answer 1

idCustomer 的列名称是什么？您没有将 name="COLUMN_NAME" 放在 @Column 注释中，因此 Hibernate 将您的 camelCaseParameter 默认为名为 camel_case_parameter 的列。具体来说，假设 idCustomer 映射到名为 id_customer.

的列

@Id
@GeneratedValue(strategy=GenerationType.AUTO)
@Column(unique=true, nullable=false) // missing name="COLUMN_NAME"
private int idCustomer;

spring Boot中如何解决sql语法异常和Unknown column 'id'

How to Solve sql grammar exception and Unknown column 'id' in springBoot

hibernate

jpa

spring-boot

spring-data

java-ee-7