休眠:无法执行对JDBC目标的架构管理

时间:2018-08-07 10:06:19

标签: java spring hibernate

我真的被困在这里,需要帮助,我一直在尝试运行我的应用程序,让休眠状态使用我的java实体创建表,但是它不断引发此异常:

无法对JDBC目标执行架构管理[创建表答案(id_answer bigint不为null的auto_increment,订单整数,文本varchar(255),question_id_question bigint,主键(id_answer))]

说我的SQL语法有错误,即使我没有编写任何sql,我也让休眠处理了这一切。

以下是我的课程和配置:

Answer.java:

package com.sfm.elearn.business.entities;

    import java.io.Serializable;
    import java.util.List;
    import javax.persistence.CascadeType;
    import javax.persistence.Entity;
    import javax.persistence.FetchType;
    import javax.persistence.GeneratedValue;
    import javax.persistence.Id;
    import javax.persistence.ManyToOne;
    import javax.persistence.OneToMany;
    import javax.persistence.OneToOne;
    import com.fasterxml.jackson.annotation.JsonIgnore;
    @Entity
    public class Answer implements Serializable {
        @Id @GeneratedValue
        private Long idAnswer;
        private String text;
        private Integer order;
        @ManyToOne
        @JsonIgnore
        private Question question;
        public Answer() {
            super();
            // TODO Auto-generated constructor stub
        }
        public Answer(String text, Integer order, Question question) {
            super();
            this.text = text;
            this.order = order;
            this.question = question;
        }
        public Long getIdAnswer() {
            return idAnswer;
        }
        public void setIdAnswer(Long idAnswer) {
            this.idAnswer = idAnswer;
        }
    }

这是我的配置:

spring.datasource.url=jdbc:mysql://localhost:3306/ElearningBase

spring.datasource.username=root
spring.datasource.password=654321
spring.datasource.testWhileIdle=true
spring.datasource.validationQuery=SELECT 1

spring.jpa.show-sql=true

spring.jpa.hibernate.ddl-auto=update

spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5Dialect

编辑:我发现了错误,属性“ order”是导致错误的原因,它是保留的SQL关键字,更改变量名称即可解决问题!

1 个答案:

答案 0 :(得分:0)

如果Hibernate正在为您创建表,则应将hibernate.ddl-auto属性设置为'create'或'create-drop'。更新选项意味着Hibernate希望您的表已经存在。参见:Hibernate hbm2ddl.auto possible values and what they do?