org.springframework.beans.factory.BeanCreationException：创建名称为 'flywayInitializer' 的 bean 时出错

Question

在学习中flyway出了问题，我按照视频课开始做项目，但是开始后发现flyway和spring的版本都过时了，换了一个版本在 pom.xml 删除创建的类别 table 并且当我尝试上传项目时，版本 e scheme flyway 向我显示此错误。

>     org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'flywayInitializer' defined in class path
> resource
> [org/springframework/boot/autoconfigure/flyway/FlywayAutoConfiguration$FlywayConfiguration.class]:
> Invocation of init method failed; nested exception is
> org.flywaydb.core.api.FlywayException: Validate failed: 
> 
> Migration checksum mismatch for migration version 01
> -> Applied to database : 1894708545
> -> Resolved locally    : -2070596035

Pom.xml之前：

<?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>1.5.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.algaworks.algamoney-api</groupId>
    <artifactId>algamoney-api</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <name>algamoney-api</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</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>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.flywaydb</groupId>
            <artifactId>flyway-core</artifactId>
            <version>3.2.1</version>
            <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>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

Pom.xml 之后：

<?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>2.3.1.RELEASE</version>
<!--        <packaging>jar</packaging> -->
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.algaworks.algamoney-api</groupId>
    <artifactId>algamoney-api</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <name>algamoney-api</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</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>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.flywaydb</groupId>
            <artifactId>flyway-core</artifactId>
            <version>6.4.4</version>
            <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>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</proje

ct>

我的脚本：

CREATE table categoria(
    id BIGINT(20) PRIMARY KEY AUTO_INCREMENT,
    nome VARCHAR(50) NOT NULL
    
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

INSERT INTO categoria (nome) values ('Lazer');
INSERT INTO categoria (nome) values ('Alimentação');
INSERT INTO categoria (nome) values ('Supermercado');
INSERT INTO categoria (nome) values ('Farmácia');
INSERT INTO categoria (nome) values ('Outros');

数据库中没有 table 尚未创建，schema_version 中也没有记录，因为我也删除了它。为什么会出错？谁能告诉我？

Answer 1

如果你查看 Flyway 的发布文档，它说，从 Flyway 4 到 5/6，schema_version table 已更改为 flyway_schema_history。

计算校验和的算法也发生了变化：

版本 3 -

crc32 超过字节：

bytes = resource.loadAsBytes()
...
crc32.update(bytes);


版本 5（不是逐字复制）- crc32 over lines（忽略 CR/LF，并使用 UTF-8 编码）：


BufferedReader bufferedReader = new BufferedReader(new StringReader(resource.loadAsString(configuration.getEncoding())));
[...]
while ((line = bufferedReader.readLine()) != null) {
     crc32.update(line.getBytes("UTF-8"));
 }

flyway在v6中用于校验和计算的class名称是org.flywaydb.core.internal.resolver.ChecksumCalculator

第一个更改（大约 table）可以通过使用以下 属性 来解决：

  flyway.table=schema_version

第二个变化（校验和算法）可以通过在调用 migrate 之前使用 flyway repair 来解决（通过命令行或代码）

Flyway flyway = fluentConfig.schemas(schemaName).load();
flyway.repair();
flyway.migrate();

Answer 2

我的pom：

这是我的 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>2.3.1.RELEASE</version>
        <!-- <packaging>jar</packaging> -->
        <relativePath /> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.algaworks.algamoney-api</groupId>
    <artifactId>algamoney-api</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <name>algamoney-api</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</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>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>2.0.1.Final</version>
        </dependency>
        <dependency>
            <groupId>org.flywaydb</groupId>
            <artifactId>flyway-core</artifactId>
            <version>6.4.4</version>
            <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>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>