flyway 相关问题

我正在使用非阻塞数据库驱动程序r2dbc开发springboot webflux项目，但是当 Springboot 应用程序启动时，Flyway 不会运行迁移。下面是我的 spring-boot pom.xml 我正在使用非阻塞数据库驱动程序开发 springboot webflux 项目r2dbc，但是当 Springboot 应用程序启动时，Flyway 不会运行迁移。下面是我的 spring-boot 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 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>2.2.2.RELEASE</version> <relativePath/>  </parent> <groupId>com.example</groupId> <artifactId>r2dbmigration</artifactId> <version>0.0.1-SNAPSHOT</version> <name>r2dbmigration</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot.experimental</groupId> <artifactId>spring-boot-starter-data-r2dbc</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-webflux</artifactId> </dependency> <dependency> <groupId>org.flywaydb</groupId> <artifactId>flyway-core</artifactId> </dependency> <dependency> <groupId>io.r2dbc</groupId> <artifactId>r2dbc-postgresql</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.postgresql</groupId> <artifactId>postgresql</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.springframework.boot.experimental</groupId> <artifactId>spring-boot-test-autoconfigure-r2dbc</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>io.projectreactor</groupId> <artifactId>reactor-test</artifactId> <scope>test</scope> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.boot.experimental</groupId> <artifactId>spring-boot-bom-r2dbc</artifactId> <version>0.1.0.M3</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> <repositories> <repository> <id>spring-milestones</id> <name>Spring Milestones</name> <url>https://repo.spring.io/milestone</url> </repository> </repositories> </project> 我的迁移文件是：V1.1__create_file_import_table.sql 内容为 DROP TABLE IF EXISTS file_import; CREATE TABLE file_import ( id BIGINT GENERATED ALWAYS AS IDENTITY, file_key CHARACTER VARYING(255) NOT NULL, created_at TIMESTAMP without time zone NOT NULL, created_by BIGINT NOT NULL, PRIMARY KEY (id) ); 应用程序属性 spring.r2dbc.url= r2dbc:postgresql://localhost:5432/import spring.r2dbc.username=postgres spring.r2dbc.password=password 我的应用程序启动顺利，但没有迁移运行。有人可以帮助我吗？ Github 网址谢谢以下 Java 实现基于 @Sim 的 Kotlin 示例。示例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 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>2.3.0.RC1</version> <relativePath/>  </parent> <groupId>com.example</groupId> <artifactId>flyway</artifactId> <version>0.0.1-SNAPSHOT</version> <name>flyway</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-webflux</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-r2dbc</artifactId> </dependency> <dependency> <groupId>dev.miku</groupId> <artifactId>r2dbc-mysql</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.flywaydb</groupId> <artifactId>flyway-core</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>io.projectreactor</groupId> <artifactId>reactor-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> <repositories> <repository> <id>spring-milestones</id> <name>Spring Milestones</name> <url>https://repo.spring.io/milestone</url> </repository> </repositories> <pluginRepositories> <pluginRepository> <id>spring-milestones</id> <name>Spring Milestones</name> <url>https://repo.spring.io/milestone</url> </pluginRepository> </pluginRepositories> </project> 示例application.yml --- spring: r2dbc: url: r2dbc:pool:mysql://localhost:3306/defaultdb username: <user> password: <pass> flyway: url: jdbc:mysql://localhost:3306/defaultdb user: ${spring.r2dbc.username} password: ${spring.r2dbc.password} baseline-on-migrate: true 添加以下 Spring Boot 配置 - FlywayConfig.java package com.example.flyway; import org.flywaydb.core.Flyway; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.core.env.Environment; // https://stackoverflow.com/a/61412233 @Configuration public class FlywayConfig { private final Environment env; public FlywayConfig(final Environment env) { this.env = env; } @Bean(initMethod = "migrate") public Flyway flyway() { return new Flyway(Flyway.configure() .baselineOnMigrate(true) .dataSource( env.getRequiredProperty("spring.flyway.url"), env.getRequiredProperty("spring.flyway.user"), env.getRequiredProperty("spring.flyway.password")) ); } } 首次执行： : Bootstrapping Spring Data R2DBC repositories in DEFAULT mode. : Finished Spring Data repository scanning in 7ms. Found 0 R2DBC repository interfaces. : Flyway Community Edition 6.4.1 by Redgate : Database: jdbc:mysql://localhost:3306/defaultdb (MySQL 5.5) : Successfully validated 1 migration (execution time 00:00.006s) : Creating Schema History table `defaultdb`.`flyway_schema_history` ... : DB: Name 'flyway_schema_history_pk' ignored for PRIMARY key. (SQL State: 42000 - Error Code: 1280) : Current version of schema `defaultdb`: << Empty Schema >> : Migrating schema `defaultdb` to version 1.0.001 - Initialise database tables : Successfully applied 1 migration to schema `default` (execution time 00:00.036s) : Netty started on port(s): 8080 :Started Application in 1.829 seconds (JVM running for 2.343) 第二次执行： : No active profile set, falling back to default profiles: default : Bootstrapping Spring Data R2DBC repositories in DEFAULT mode. : Finished Spring Data repository scanning in 11ms. Found 0 R2DBC repository interfaces. : Flyway Community Edition 6.4.1 by Redgate : Database: jdbc:mysql://localhost:3306/defaultdb (MySQL 5.5) : Successfully validated 1 migration (execution time 00:00.009s) : Current version of schema `defaultdb`: 1.0.001 : Schema `defaultdb` is up to date. No migration necessary. : Netty started on port(s): 8080 : Started Application in 1.273 seconds (JVM running for 1.695) 回答有点晚了，但您也可以手动设置 Spring bean 来处理迁移。将 Flyway 配置添加到 application.yml（或 .properties）： spring: flyway: url: jdbc:postgresql://localhost:5432/<db-name> user: <user> password: <password> 此代码是 Kotlin，但可以轻松翻译为 Java： import org.flywaydb.core.Flyway import org.springframework.boot.autoconfigure.flyway.FlywayProperties import org.springframework.context.annotation.Bean import org.springframework.context.annotation.Configuration @Configuration class FlywayConfig(private val flywayProperties: FlywayProperties) { @Bean(initMethod = "migrate") fun flyway(): Flyway? { return Flyway(Flyway.configure() .baselineOnMigrate(true) .dataSource(flywayProperties.url, flywayProperties.user, flywayProperties.password) ) } } 这个问题似乎还没有“官方”解决方案，但有一个临时解决方案可以解决这个问题：“R2DBC迁移工具”。 @Nikita Konev 为我们提供了一个很好的临时解决方案来解决这个问题。我一直在用它并且效果很好。请检查： R2DBC 支持 - Flyway：https://github.com/flyway/flyway/issues/2502 R2DBC 迁移工具：https://github.com/nkonev/r2dbc-migrate 示例项目（您可以尝试一下）：https://github.com/nkonev/r2dbc-migrate-example 感谢尼基塔·科内夫通过结合使用 Flyway + JDBC 和 R2DBC 来完成其余的数据库交互，解决了这个问题。应用程序.属性 my.database.url=postgresql://localhost:5432}/my_database spring.r2dbc.url=r2dbc:${my.database.url} spring.r2dbc.username=user spring.r2dbc.password=pass spring.flyway.locations=classpath:db/migration spring.flyway.enabled=true spring.flyway.validate-on-migrate=true spring.flyway.user=${spring.r2dbc.username} spring.flyway.password=${spring.r2dbc.password} spring.flyway.url=jdbc:${my.database.url} 构建.gradle dependencies { ... implementation 'org.springframework.boot:spring-boot-starter-data-r2dbc' runtimeOnly 'org.flywaydb:flyway-core:7.9.1' runtimeOnly 'org.postgresql:postgresql:42.2.20' runtimeOnly 'io.r2dbc:r2dbc-postgresql' runtimeOnly 'org.springframework.boot:spring-boot-starter-jdbc' ... } flyway迁移SQL脚本的位置： src/main/resources/db/migration/V1__create_my_table.sql 这可能是延迟响应，但就我个人而言，我更喜欢只添加弹簧启动器。这对我有用： // build.gradle.kts implementation("org.flywaydb:flyway-core:7.9.1") runtimeOnly("org.springframework.boot:spring-boot-starter-jdbc") runtimeOnly("org.postgresql:postgresql:42.2.20") 那么您的 application.yml 文件可能如下所示： # application.yml spring: r2dbc: url: r2dbc:postgresql://user:pass@host/db flyway: enabled: true validate-on-migrate: true user: user password: pass url: jdbc:postgresql://host:5432/db schemas: ["schema"] 评论中提到：R2DBC 和 Flyway 还不兼容。解决方法是使用 Maven Flyway 插件执行 Flyway 迁移，请注意，您需要提供JDBC-URL。在您的情况下，您可以通过触发迁移 mvn flyway:migrate -Dflyway.url=jdbc:postgresql://localhost:5432/import -Dflyway.user=postgres -Dflyway.password=password 或通过 mvn flyway:migrate 如果您在 pom.xml 中添加插件+配置 <plugin> <groupId>org.flywaydb</groupId> <artifactId>flyway-maven-plugin</artifactId> <version>6.1.3</version> <configuration> <url>jdbc:postgresql://localhost:5432/import</url> <user>postgres</user> <password>password</password> </configuration> </plugin> 通过执行迁移有一个 R2dbc Migrate 项目可以使用 R2dbc API 处理数据库迁移。与传统的 Flyway 等相比，它不需要 Jdbc 驱动，并且您可以在将 r2dbc-migrate-spring-boot-starter 添加到项目依赖项中时直接重用 Spring r2dbc 属性，并且 R2dbc Migrate db 脚本文件格式 100% 兼容飞行路线。如果您有一些 Flyway 经验，很容易迁移到使用 R2dbc Migrate。我已经在实际项目中使用它超过3年了，效果很好。检查我的示例项目：https://github.com/hantsy/spring-r2dbc-sample/tree/master/r2dbc-migrate

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