Question

如此处所述（https://github.com/liquibase/liquibase-hibernate/issues/74）我遇到了使liquibase-hibernate扩展正常工作的问题。我想我已经完成了所有设置，但似乎我一直遇到奇怪的问题。我觉得我错过了一些简单的东西，但我想我已按照提供的所有说明进行操作。

我正在使用liquibase 3.3.2，Hibernate 4.3.0.Final，java 1.7.0_71和liquibase-hibernate4-3.5.jar。我的CLASSPATH环境变量是空的，但liquibase shell脚本会添加一些东西。当我使用正常的liquibase命令进行交互时，我从$ LIQUIBASE_HOME / lib /目录中删除了没有扩展名的扩展名，它可以正常工作。我用DEBUG输出重新启动命令以提供更多信息。

$ echo $CLASSPATH


$ java -version
java version "1.7.0_71"
Java(TM) SE Runtime Environment (build 1.7.0_71-b14)
Java HotSpot(TM) 64-Bit Server VM (build 24.71-b01, mixed mode)

$ liquibase --version
Liquibase Version: 3.3.2

$ liquibase diffChangeLog
//The below is the stuff liquibase is adding to my classpath
.:/c/repos/ServeDirtyLibsInJava/liquibaseLib/liquibase.jar:/c/repos/ServeDirtyLibsInJava/liquibaseLib/lib/liquibase-hibernate4-3.5.jar:/c/repos/ServeDirtyLibsInJava/liquibaseLib/lib/snakeyaml-1.13.jar
WARNING 1/19/15 12:42 AM: liquibase: Can not use class liquibase.ext.hibernate.database.HibernateEjb3Database as a Liquibase service because org.hibernate.dialect.Dialect is not in the classpath
WARNING 1/19/15 12:42 AM: liquibase: Can not use class liquibase.ext.hibernate.database.HibernateSpringDatabase as a Liquibase service because org.hibernate.dialect.Dialect is not in the classpath
WARNING 1/19/15 12:42 AM: liquibase: Can not use class liquibase.ext.hibernate.database.HibernateClassicDatabase as a Liquibase service because org.hibernate.dialect.Dialect is not in the classpath
DEBUG 1/19/15 10:20 AM: liquibase: Connected to root@localhost@jdbc:mysql://localhost:3306/dirtylibs
DEBUG 1/19/15 10:20 AM: liquibase: Setting auto commit to false from true
Unexpected error running Liquibase: java.lang.RuntimeException: Cannot find database driver: Driver class was not specified and could not be determined from the url (hibernate:spring:com.companyname.dirtylibs.persistence.entities?dialect=org.hibernate.dialect.MySQL5Dialect)

SEVERE 1/19/15 10:20 AM: liquibase: java.lang.RuntimeException: Cannot find database driver: Driver class was not specified and could not be determined from the url (hibernate:spring:com.companyname.dirtylibs.persistence.entities?dialect=org.hibernate.dialect.MySQL5Dialect)
liquibase.exception.DatabaseException: liquibase.exception.DatabaseException: java.lang.RuntimeException: Cannot find database driver: Driver class was not specified and could not be determined from the url (hibernate:spring:com.companyname.dirtylibs.persistence.entities?dialect=org.hibernate.dialec
t.MySQL5Dialect)
        at liquibase.integration.commandline.CommandLineUtils.createDatabaseObject(CommandLineUtils.java:69)
        at liquibase.integration.commandline.Main.createReferenceDatabaseFromCommandParams(Main.java:1169)
        at liquibase.integration.commandline.Main.doMigration(Main.java:936)
        at liquibase.integration.commandline.Main.run(Main.java:175)
        at liquibase.integration.commandline.Main.main(Main.java:94)
Caused by: liquibase.exception.DatabaseException: java.lang.RuntimeException: Cannot find database driver: Driver class was not specified and could not be determined from the url (hibernate:spring:com.companyname.dirtylibs.persistence.entities?dialect=org.hibernate.dialect.MySQL5Dialect)
        at liquibase.database.DatabaseFactory.openConnection(DatabaseFactory.java:239)
        at liquibase.database.DatabaseFactory.openDatabase(DatabaseFactory.java:143)
        at liquibase.integration.commandline.CommandLineUtils.createDatabaseObject(CommandLineUtils.java:50)
        ... 4 more
Caused by: java.lang.RuntimeException: Cannot find database driver: Driver class was not specified and could not be determined from the url (hibernate:spring:com.companyname.dirtylibs.persistence.entities?dialect=org.hibernate.dialect.MySQL5Dialect)
        at liquibase.database.DatabaseFactory.openConnection(DatabaseFactory.java:191)
        ... 6 more

我的liquibase.properties文件

driver=com.mysql.jdbc.Driver
classpath=mysql-connector-java-5.1.6.jar
url=jdbc:mysql://localhost:3306/dirtylibs
username=root
password=password
changeLogFile=changelog.xml
#referenceDriver=liquibase.ext.hibernate.database.connection.HibernateDriver
referenceUrl=hibernate:spring:com.companyname.dirtylibs.persistence.entities?dialect=org.hibernate.dialect.MySQL5Dialect
referenceUsername=root
referencePassword=password

如果我取消注释我的referenceDriver，我会得到这个。这里有什么我想念的吗？我以为我拥有所有必需的依赖项，而且我不确定这是否是早期问题的一些表现，其中扩展无法正确加载内容。

$ liquibase diffChangeLog
WARNING 1/19/15 12:49 AM: liquibase: Can not use class liquibase.ext.hibernate.database.HibernateEjb3Database as a Liquibase service because org.hibernate.dialect.Dialect is not in the classpath
WARNING 1/19/15 12:49 AM: liquibase: Can not use class liquibase.ext.hibernate.database.HibernateSpringDatabase as a Liquibase service because org.hibernate.dialect.Dialect is not in the classpath
WARNING 1/19/15 12:49 AM: liquibase: Can not use class liquibase.ext.hibernate.database.HibernateClassicDatabase as a Liquibase service because org.hibernate.dialect.Dialect is not in the classpath
WARNING 1/19/15 12:49 AM: liquibase: Can not use class liquibase.ext.hibernate.snapshot.SequenceSnapshotGenerator as a Liquibase service because org.hibernate.id.factory.IdentifierGeneratorFactory is not in the classpath
WARNING 1/19/15 12:49 AM: liquibase: Can not use class liquibase.ext.hibernate.snapshot.TableSnapshotGenerator as a Liquibase service because org.hibernate.id.factory.IdentifierGeneratorFactory is not in the classpath
Unexpected error running Liquibase: org.hibernate.sql.Alias
SEVERE 1/19/15 10:22 AM: liquibase: org.hibernate.sql.Alias
java.lang.NoClassDefFoundError: org/hibernate/sql/Alias
        at liquibase.ext.hibernate.snapshot.PrimaryKeySnapshotGenerator.<clinit>(PrimaryKeySnapshotGenerator.java:27)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
        at liquibase.snapshot.SnapshotGeneratorFactory.<init>(SnapshotGeneratorFactory.java:29)
        at liquibase.snapshot.SnapshotGeneratorFactory.getInstance(SnapshotGeneratorFactory.java:43)
        at liquibase.snapshot.SnapshotControl.addType(SnapshotControl.java:95)
        at liquibase.snapshot.SnapshotControl.setTypes(SnapshotControl.java:88)
        at liquibase.snapshot.SnapshotControl.<init>(SnapshotControl.java:25)
        at liquibase.command.DiffCommand.createReferenceSnapshot(DiffCommand.java:185)
        at liquibase.command.DiffCommand.createDiffResult(DiffCommand.java:140)
        at liquibase.command.DiffToChangeLogCommand.run(DiffToChangeLogCommand.java:51)
        at liquibase.command.AbstractCommand.execute(AbstractCommand.java:8)
        at liquibase.integration.commandline.CommandLineUtils.doDiffToChangeLog(CommandLineUtils.java:121)
        at liquibase.integration.commandline.Main.doMigration(Main.java:936)
        at liquibase.integration.commandline.Main.run(Main.java:175)
        at liquibase.integration.commandline.Main.main(Main.java:94)
Caused by: java.lang.ClassNotFoundException: org.hibernate.sql.Alias
        at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        ... 18 more

将hibernate jar添加到liquibase / lib文件夹后（这确实是错误的）错误变成了这个。我尝试恢复到旧版本的插件（同时降级liquibase），但它没有帮助。

$ liquibase --logLevel=DEBUG diffChangeLog
.:/c/repos/ServeDirtyLibsInJava/liquibaseLib/liquibase.jar:/c/repos/ServeDirtyLibsInJava/liquibaseLib/lib/hibernate-core-4.3.0.Final.jar:/c/repos/ServeDirtyLibsInJava/liquibaseLib/lib/liquibase-hibernate4-3.5.jar:/c/repos/ServeDirtyLibsInJava/liquibaseLib/lib/snakeyaml-1.13.jar
WARNING 1/19/15 10:38 AM: liquibase: Can not use class liquibase.ext.hibernate.database.HibernateSpringDatabase as a Liquibase service because org.springframework.beans.factory.support.BeanDefinitionRegistry is not in the classpath
DEBUG 1/19/15 10:38 AM: liquibase: Connected to root@localhost@jdbc:mysql://localhost:3306/dirtylibs
DEBUG 1/19/15 10:38 AM: liquibase: Setting auto commit to false from true
WARNING 1/19/15 10:38 AM: liquibase: Unknown database: Hibernate
DEBUG 1/19/15 10:38 AM: liquibase: Connected to null@hibernate:spring:com.companyname.dirtylibs.persistence.entities?dialect=org.hibernate.dialect.MySQL5Dialect
DEBUG 1/19/15 10:38 AM: liquibase: Not adjusting the auto commit mode; it is already false
INFO 1/19/15 10:38 AM: liquibase: Error getting default schema
java.lang.NullPointerException
        at liquibase.executor.jvm.JdbcExecutor$QueryCallableStatementCallback.doInCallableStatement(JdbcExecutor.java:383)
        at liquibase.executor.jvm.JdbcExecutor.execute(JdbcExecutor.java:96)
        at liquibase.executor.jvm.JdbcExecutor.query(JdbcExecutor.java:132)
        at liquibase.executor.jvm.JdbcExecutor.query(JdbcExecutor.java:143)
        at liquibase.executor.jvm.JdbcExecutor.queryForObject(JdbcExecutor.java:151)
        at liquibase.executor.jvm.JdbcExecutor.queryForObject(JdbcExecutor.java:166)
        at liquibase.executor.jvm.JdbcExecutor.queryForObject(JdbcExecutor.java:161)
        at liquibase.database.AbstractJdbcDatabase.getConnectionSchemaName(AbstractJdbcDatabase.java:318)
        at liquibase.database.AbstractJdbcDatabase.getDefaultSchemaName(AbstractJdbcDatabase.java:301)
        at liquibase.CatalogAndSchema.customize(CatalogAndSchema.java:132)
        at liquibase.snapshot.SnapshotGeneratorFactory.createSnapshot(SnapshotGeneratorFactory.java:116)
        at liquibase.command.DiffCommand.createReferenceSnapshot(DiffCommand.java:190)
        at liquibase.command.DiffCommand.createDiffResult(DiffCommand.java:140)
        at liquibase.command.DiffToChangeLogCommand.run(DiffToChangeLogCommand.java:51)
        at liquibase.command.AbstractCommand.execute(AbstractCommand.java:8)
        at liquibase.integration.commandline.CommandLineUtils.doDiffToChangeLog(CommandLineUtils.java:121)
        at liquibase.integration.commandline.Main.doMigration(Main.java:936)
        at liquibase.integration.commandline.Main.run(Main.java:175)
        at liquibase.integration.commandline.Main.main(Main.java:94)
DEBUG 1/19/15 10:38 AM: liquibase: Computed checksum for 1421681927678 as b60efdd1567f2fd4e5407a8d157cb0b6
Unexpected error running Liquibase: java.lang.NullPointerException

SEVERE 1/19/15 10:38 AM: liquibase: java.lang.NullPointerException
liquibase.exception.LiquibaseException: liquibase.command.CommandExecutionException: java.lang.NullPointerException
        at liquibase.integration.commandline.CommandLineUtils.doDiffToChangeLog(CommandLineUtils.java:123)
        at liquibase.integration.commandline.Main.doMigration(Main.java:936)
        at liquibase.integration.commandline.Main.run(Main.java:175)
        at liquibase.integration.commandline.Main.main(Main.java:94)
Caused by: liquibase.command.CommandExecutionException: java.lang.NullPointerException
        at liquibase.command.AbstractCommand.execute(AbstractCommand.java:13)
        at liquibase.integration.commandline.CommandLineUtils.doDiffToChangeLog(CommandLineUtils.java:121)
        ... 3 more
Caused by: java.lang.NullPointerException
        at liquibase.snapshot.jvm.CatalogSnapshotGenerator.getDatabaseCatalogNames(CatalogSnapshotGenerator.java:82)
        at liquibase.snapshot.jvm.CatalogSnapshotGenerator.snapshotObject(CatalogSnapshotGenerator.java:41)
        at liquibase.snapshot.jvm.JdbcSnapshotGenerator.snapshot(JdbcSnapshotGenerator.java:60)
        at liquibase.snapshot.SnapshotGeneratorChain.snapshot(SnapshotGeneratorChain.java:50)
        at liquibase.snapshot.DatabaseSnapshot.include(DatabaseSnapshot.java:163)
        at liquibase.snapshot.DatabaseSnapshot.init(DatabaseSnapshot.java:55)
        at liquibase.snapshot.DatabaseSnapshot.<init>(DatabaseSnapshot.java:37)
        at liquibase.snapshot.JdbcDatabaseSnapshot.<init>(JdbcDatabaseSnapshot.java:25)
        at liquibase.snapshot.SnapshotGeneratorFactory.createSnapshot(SnapshotGeneratorFactory.java:126)
        at liquibase.snapshot.SnapshotGeneratorFactory.createSnapshot(SnapshotGeneratorFactory.java:119)
        at liquibase.command.DiffCommand.createReferenceSnapshot(DiffCommand.java:190)
        at liquibase.command.DiffCommand.createDiffResult(DiffCommand.java:140)
        at liquibase.command.DiffToChangeLogCommand.run(DiffToChangeLogCommand.java:51)
        at liquibase.command.AbstractCommand.execute(AbstractCommand.java:8)
        ... 4 more

Answer 1

我通过将这些罐子添加到我的类路径中来实现它。这非常混乱，没有很好的记录。我经历的过程是：

下载此处找到的正确插件项目的源代码（https://github.com/liquibase/liquibase-hibernate/releases），在我的情况下，它是liquibase-hibernate4-3.5。
运行mvn dependency:copy-dependencies。这会将它们转储到/target/dependency/。复制所有这些罐子并将它们放入LIQUIBASE_HOME/lib目录。
我使用gradle所以我使用自定义任务来复制所有依赖项。如果您正在使用maven，则可以在自己的项目中使用与2相同的步骤来获取所有的depdenencies。我将这些库从输出目录复制到LIQUIBASE_HOME/lib目录。
```
task copyToLib(type: Copy) {
    into "$buildDir/output/libs"
    from configurations.runtime
}
```
我还将正确的hibernate-liquibase-4.3.5.jar放入LIQUIBASE_HOME/lib目录。

这给了我插件所需的所有依赖项。

这是一个令人讨厌的混乱球，但你能做些什么:(

Answer 2

如果检查此插件的源代码，则以下依赖项（所有spring依赖项）在pom中标记为“提供”范围：

spring-test
spring-jdbc
spring-beans
spring-context
spring-orm

因此插件会假设这些已经由您的应用程序在类路径中提供，但这不会自动发生在您的maven构建中，因为它不会使用与您的应用程序相同的类路径运行。

所以，要修复，在插件中添加依赖项，比执行jar文件shuffle更容易：

<plugin>
            <groupId>org.liquibase</groupId>
            <artifactId>liquibase-maven-plugin</artifactId>
            <version>3.4.1</version>
            <dependencies>

                <dependency>
                    <groupId>org.liquibase.ext</groupId>
                    <artifactId>liquibase-hibernate5</artifactId>
                    <version>3.6</version>
                </dependency>
                <dependency>
                    <groupId>org.liquibase</groupId>
                    <artifactId>liquibase-core</artifactId>
                    <version>3.5.3</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-jdbc</artifactId>
                    <version>4.3.2.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-beans</artifactId>
                    <version>4.3.2.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-context</artifactId>
                    <version>4.3.2.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-orm</artifactId>
                    <version>4.3.2.RELEASE</version>
                </dependency>
            </dependencies>
        </plugin>

如果你很热衷，你可以在github repo上做一个pull请求，从pom中删除提供的范围，哦，也可能是这行：

            <role>architect</role>

Answer 3

我尝试过的路径与接受的路径有点不同。我在war的pom.xml中创建了一个dev配置文件（我正在使用maven），它与默认配置文件完全相同，但包含war / WEB-INF / lib下的Liquibase-hibernate依赖jar文件。然后不使用提供的liquibase命令行，而是直接使用liquibase.jar文件，类路径是我的war文件：

java -jar $LIQUIBASE/liquibase.jar --classpath=<WAR FILE HERE>  --defaultsFile=<yourpath>/liquibase.properties --logLevel=info

然后创建了一个connvenience脚本，它将使用liquibase-hibernate配置文件构建我的项目，然后执行diffChangeLog命令。

Answer 4

我得到了同样的错误。我通过删除hibernate.cfg.xml中的hbm2ddl-property来修复它。如果启用此属性，则无法在cfg.xml中读取驱动程序类。在git中liquibase-hibernate wiki中有一个部分，它说“为什么不使用HBM2DDL”，但它并没有真正说明要从cfg.xml中删除它。

Liquibase Hibernate插件不起作用

4 个答案: