Question

每当我的应用程序启动时，我都会不断收到以下错误消息：

Caused by: org.h2.jdbc.JdbcSQLException: Unique index or primary key violation: "PRIMARY KEY ON PUBLIC.SERMON_SESSION(ID)"; SQL statement:
INSERT INTO SERMON_SESSION (id, session_enum) VALUES ('1', 'SUN_MRN'), ('2', 'SUN_EVE'), ('3', 'TUE_BIB'), ('4', 'FRI_BIB'), ('5', 'WKD_CNF') [23505-197]

我该如何解决？我必须自己分配讲道会话ID，因为在以后的专栏中将使用它。

application.properties

spring.h2.console.enabled=true
spring.h2.console.path=/h2
spring.datasource.url=jdbc:h2:mem:erc;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE
spring.datasource.driver-class-name=org.h2.Driver
spring.datasource.username=sa
spring.datasource.password=
spring.datasource.initialization-mode=embedded
spring.jpa.properties.hibernate.hbm2ddl.import_files=classpath://resources/data.sql
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.H2Dialect
spring.jpa.show-sql=false
spring.jpa.hibernate.ddl-auto=create-drop
spring.jpa.properties.hibernate.hbm2ddl.import_files_sql_extractor=org.hibernate.tool.hbm2ddl.MultipleLinesSqlCommandExtractor
logging.level.com.erc.api.*=DEBUG
logging.level.org.hibernate=OFF
logging.level.org.hibernate.SQL=INFO
logging.level.org.hibernate.type.descriptor.sql=INFO
logging.level.org.jaudiotagger=WARN
spring.servlet.multipart.max-file-size=60MB
spring.servlet.multipart.max-request-size=60MB
application.sermon_path=classpath://resources/files/sermons/}

SermonSession.java

@Table(name = "sermon_session", uniqueConstraints = @UniqueConstraint(columnNames = {"id", "sessionEnum"}))
@Entity
public class SermonSession {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(updatable = false, nullable = false, unique = true)
    private int id;
    @Enumerated(EnumType.STRING)
    @Column(unique = true)
    private SessionEnum sessionEnum;

    public SermonSession(String session) {
        setSessionEnum(session);
    }

    public SermonSession() {
        this.sessionEnum = null;
    }

    public String toString() {
        return String.format("{ id: %d, session_enum: %s }", getId(), getSessionEnum());
    }

    String getSessionEnum() {
        return this.sessionEnum.getSession();
    }

    private void setSessionEnum(String session) {
        this.sessionEnum = SessionEnum.fromSession(session);
    }

    private int getId() {
        return id;
    }

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

data.sql

INSERT INTO SERMON_SESSION (id, session_enum)
VALUES ('1', 'SUN_MRN'),
       ('2', 'SUN_EVE'),
       ('3', 'TUE_BIB'),
       ('4', 'FRI_BIB'),
       ('5', 'WKD_CNF');

将data.sql更改为：

INSERT INTO SERMON_SESSION (session_enum)
VALUES ('SUN_MRN'),
       ('SUN_EVE'),
       ('TUE_BIB'),
       ('FRI_BIB'),
       ('WKD_CNF');

产生以下错误消息：

Caused by: org.h2.jdbc.JdbcSQLException: Unique index or primary key violation: "UK_AA7KWY8HO9GLHF1VI4HDB61X8_INDEX_8 ON PUBLIC.SERMON_SESSION(SESSION_ENUM) VALUES ('SUN_MRN', 1)"; SQL statement:
INSERT INTO SERMON_SESSION (session_enum) VALUES ('SUN_MRN'), ('SUN_EVE'), ('TUE_BIB'), ('FRI_BIB'), ('WKD_CNF') [23505-197]

Answer 1

@GeneratedValue(strategy = GenerationType.IDENTITY)将允许自动生成唯一的ID，而无需自己放置。

以下内容应该足够了

DELETE FROM SERMON_SESSION;
INSERT INTO SERMON_SESSION (session_enum)
VALUES ('SUN_MRN'),
       ('SUN_EVE'),
       ('TUE_BIB'),
       ('FRI_BIB'),
       ('WKD_CNF');

Answer 2

我最近有一个类似的问题。问题可能是，当您没有优雅地关闭应用程序时（没有向终端发布消息以关闭应用程序），会话管理器可能没有机会执行删除操作（请参阅本主题：Spring boot ddl auto generator ）。

我们发现的解决方案是手动删除数据库并将spring.jpa.hibernate.ddl-auto=create更改为spring.jpa.hibernate.hbm2ddl.auto=create。

那到底是为什么？我还在这里等待answer。

唯一索引或主键冲突：“ PUBLIC.xxx上的PRIMARY KEY”； SQL语句

2 个答案: