[英]data.sql file not pumping data to tables in spring boot
If I use the spring-boot-starter-parent version 2.5.0 data.sql file doesn't get executed.如果我使用 spring-boot-starter-parent 版本 2.5.0 data.sql 文件不会被执行。 But if I use version 2.4.1 everything works perfectly.
但如果我使用 2.4.1 版本,一切都会完美运行。 I'm putting my codes below as well.
我也把我的代码放在下面。
Spring Application Runner Class: Spring 应用程序运行器 Class:
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
My Entity Class:我的实体 Class:
package com.example.demo.entities;
import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;
import javax.persistence.*;
@NoArgsConstructor
@AllArgsConstructor
@Getter
@Setter
@Entity
@Table(name = "cars")
public class Car {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
public Integer id;
@Column(name = "car_name")
public String carName;
@Column(name = "car_year")
public Integer carYear;
}
My application.properties File:我的 application.properties 文件:
spring.datasource.url=jdbc:postgresql://localhost:5432/postgres
spring.datasource.username=postgres
spring.datasource.password=admin
spring.jpa.show-sql=true
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
spring.jpa.hibernate.ddl-auto=create
spring.datasource.initialization-mode=always
My data.sql File:我的数据.sql 文件:
INSERT INTO cars(car_name, car_year)
VALUES('car1', 2001);
INSERT INTO cars(car_name, car_year)
VALUES('car2', 2002);
INSERT INTO cars(car_name, car_year)
VALUES('car3', 2003);
INSERT INTO cars(car_name, car_year)
VALUES('car4', 2004);
My pom.xml File:我的 pom.xml 文件:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.5.0</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>
Some extra information with pictures:一些带图片的额外信息:
My project structure and the table created in the database我的项目结构和数据库中创建的表
And also I've never seen these two lines while I was running the application on spring-boot-starter-parent version 2.4.1而且我在 spring-boot-starter-parent 版本 2.4.1 上运行应用程序时从未见过这两行
I'm completely ok with just using spring-boot-starter-parent version 2.4.1 which I was using until now, but I'm also so curious about the reason for this issue.我完全可以只使用我一直使用的 spring-boot-starter-parent 2.4.1 版,但我也很好奇这个问题的原因。
The Spring Boot 2.5 Release Notes says to set Spring Boot 2.5 发行说明说要设置
spring.jpa.defer-datasource-initialization: true
to allow Hibernate to create the schema before loading data.sql.允许 Hibernate 在加载 data.sql 之前创建模式。
I can see they have mentioned it here :我可以看到他们在这里提到过:
By default, data.sql scripts are now run before Hibernate is initialized.
默认情况下,data.sql 脚本现在在 Hibernate 初始化之前运行。 This aligns the behavior of basic script-based initialization with that of Flyway and Liquibase.
这使基于脚本的基本初始化行为与 Flyway 和 Liquibase 的行为保持一致。 If you want to use data.sql to populate a schema created by Hibernate, set spring.jpa.defer-datasource-initialization to true.
If you want to use data.sql to populate a schema created by Hibernate, set spring.jpa.defer-datasource-initialization to true. While mixing database initialization technologies is not recommended, this will also allow you to use a schema.sql script to build upon a Hibernate-created schema before it's populated via data.sql.
虽然不建议混合数据库初始化技术,但这也将允许您使用 schema.sql 脚本在通过 data.sql 填充之前构建 Hibernate 创建的模式。
So you can try所以你可以试试
spring.jpa.defer-datasource-initialization: true
A worth read 9.3.值得一读9.3。 Initialize a Database Using Basic SQL Scripts
使用基本 SQL 脚本初始化数据库
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