4

在 Spring Boot，Spring Data JPA 项目中，我有一个名为Country的实体类，它的列数很少。我生成了更改日志并使用以下命令应用它

$ mvn process-test-resources

$ mvn process-resources

它使用 liquibase 和 liquibase-hibernate5 插件创建表

国家.java

package com.liquibasedemo.model;

import com.fasterxml.jackson.annotation.JsonIgnore;
import lombok.Data;

import javax.persistence.*;


@Entity
@Table(name = "country")
@Data
public class Country
{
    @Id
    @Column(name = "id")
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

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

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

    @Column(name = "iso_code")
    private String isoCode;

    @Column(name = "test_code")
    private String testCode;


    @ManyToOne
    @JoinColumn(name = "region_id")
    @JsonIgnore
    private Region region;

}

我将testCodeCountry 类中的列数据类型从 Long 更新为 String，并使用上述命令生成变更集。应用变更集后，数据类型保持不变。这是 pom.xml 文件

pom.xml

<?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 http://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>2.1.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com</groupId>
    <artifactId>liquibasedemo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>liquibasedemo</name>
    <description>Liquibase Demo project with Spring Boot and Spring Data</description>

    <properties>
        <spring-boot.version>2.1.5.RELEASE</spring-boot.version>
        <hibernate.version>5.4.3.Final</hibernate.version>
        <liquibase-maven-plugin.version>3.5.5</liquibase-maven-plugin.version>
        <liquibase-hibernate5.version>3.6</liquibase-hibernate5.version>
        <validation-api.version>2.0.1.Final</validation-api.version>
        <javassist.version>3.24.0-GA</javassist.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-envers</artifactId>
            <version>${hibernate.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
        </dependency>

        <dependency>
            <groupId>org.liquibase</groupId>
            <artifactId>liquibase-core</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </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>
            </plugin>

            <plugin>
                <groupId>org.liquibase</groupId>
                <artifactId>liquibase-maven-plugin</artifactId>
                <version>${liquibase-maven-plugin.version}</version>
                <configuration>
                    <propertyFile>src/main/resources/liquibase.properties</propertyFile>
                    <changeLogFile>src/main/resources/db/db.changelog-master.xml</changeLogFile>
                    <diffChangeLogFile>src/main/resources/db/changelog/${maven.build.timestamp}_changelog.xml</diffChangeLogFile>
                    <logging>info</logging>
                </configuration>

                <executions>
                    <execution>
                        <id>update-profile</id>
                        <phase>process-resources</phase>
                        <goals>
                            <goal>update</goal>
                        </goals>
                    </execution>
                    <execution>
                        <id>diff-profile</id>
                        <phase>process-test-resources</phase>
                        <goals>
                            <goal>diff</goal>
                        </goals>
                    </execution>
                </executions>

                <dependencies>
                    <dependency>
                        <groupId>org.liquibase.ext</groupId>
                        <artifactId>liquibase-hibernate5</artifactId>
                        <version>${liquibase-hibernate5.version}</version>
                    </dependency>
                    <dependency>
                        <groupId>org.springframework.boot</groupId>
                        <artifactId>spring-boot-starter-data-jpa</artifactId>
                        <version>${spring-boot.version}</version>
                    </dependency>
                    <dependency>
                        <groupId>javax.validation</groupId>
                        <artifactId>validation-api</artifactId>
                        <version>${validation-api.version}</version>
                    </dependency>
                    <dependency>
                        <groupId>org.javassist</groupId>
                        <artifactId>javassist</artifactId>
                        <version>${javassist.version}</version>
                    </dependency>

                </dependencies>
            </plugin>
        </plugins>
    </build>
</project>
4

1 回答 1

6

This generation of changeset using liquibase-hibernate5 does not include the field type changes. If you can see into the changeset file you will not find the changeset generated regarding your field type change. It seems to be not supported by the liquibase-hibernate5 plugin.

  1. Have a look at the comments in this class

  2. The developer of this plugin is discussing about it at link

    The reason these tend to be ignored is because how hibernate represents the datatype is usually different than how the database represents the datatype even when they are actually the same. I'm looking at ways to improve this with Liquibase 4.

  3. Solution for now would be to add the diff manually. The following code is taken from link

    <changeSet author="liquibase-docs" id="modifyDataType-example">
    <modifyDataType catalogName="cat"
            columnName="id"
            newDataType="int"
            schemaName="public"
            tableName="person"/>
</changeSet>
于 2019-06-06T15:51:09.357 回答