休眠错误column0_.id不存在

问题描述

我有一个使用Hibernate映射到postgres数据库的模型类.我的模型课是:

I have a model class that is mapped to a postgres database using hibernate. My model class is:

CheckRes.java

package com.example.demo.model;
import javax.persistence.Id;
import javax.persistence.*;

@Entity
@Table(name="checkers",schema = "public")
public class CheckRes {
    public long getID() {
        return ID;
    }

    public void setID(long ID) {
        this.ID = ID;
    }

    public String getCheck() {
        return check;
    }

    public CheckRes() {
    }

    public void setCheck(String check) {
        this.check = check;
    }

    @Id
    private long ID;

    public CheckRes(String check) {
        this.check = check;
    }

    @Column(name="check")
    private String check;

}

application.properties

spring.jpa.hibernate.naming_strategy=org.hibernate.cfg.EJB3NamingStrategy
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQL9Dialect

spring.jpa.hibernate.ddl-auto = update

下表已存在于db中，其创建脚本为:

The following table is already existing in db with create script as:

CREATE TABLE public."checkers"
(
    "ID" bigint NOT NULL,
    "check" character varying(20),
    CONSTRAINT "checkers_pkey" PRIMARY KEY ("ID")
)

TABLESPACE pg_default;

ALTER TABLE public."checkers"
    OWNER to postgres;

稍后，当我尝试从邮递员调用controller get方法时，出现以下错误.

Later when I am trying to invoke the controller get method from a postman , I am getting the following error.

如果该表不存在，那么休眠将自动创建一个带有'_'的表，并且没有错误.但是我不需要休眠来创建任何表.它只需要使用现有的CRUD操作，我还有其他命名约定吗?

If the table doesnt exist then hibernate automatically creates a table with '_' and there are no errors. But I dont need the hibernate to create any tables. It just needs to use the existing ones for CRUD operations,is there any other naming convention I am missing?

推荐答案

通常，遵循 java命名约定.据此，您应该将 ID 字段重命名为 id .

Generally, this is a good practice to follow java naming conventions. According to that you should rename ID field to id.

然后@ User-Upvotedon'tsayThanks和@a_horse_with_no_name注意到，您应该将 @Column 与引号:

And then as was noticed by @User-Upvotedon'tsayThanks and @a_horse_with_no_name you should use @Column with quotes:

@Id
@Column(name="`ID`")
private long id;

您的获取器和设置器应该遵循 JavaBean约定.因此，对于上述字段，您应该具有以下getter和setter:

Also your getters and setters should follow JavaBean conventions. So, for the above field you should have the following getter and setter:

public long getId() {
   return id;
}
public void setId(long id) {
   this.id = id;
}

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