【发布时间】：2017-12-06 15:27:02
【问题描述】：
我从事 Spring-boot 项目并使用 Flyway 进行数据库迁移。 在开发配置文件中工作时，我想用虚拟数据填充数据库。 为了获得完全相同的初始数据值，我覆盖了 FlywayMigrationStrategy Bean，以便它在迁移开始之前执行 flyway.clean()：
@Bean
@Profile("dev")
public FlywayMigrationStrategy cleanMigrateStrategy() {
FlywayMigrationStrategy strategy = new FlywayMigrationStrategy() {
@Override
public void migrate(Flyway flyway) {
flyway.clean();
flyway.migrate();
}
};
return strategy;
}
我的 Migration 文件夹包含几个版本化的迁移脚本和一个 afterMigrate 回调脚本，用于将数据添加到创建的表中。
现在的问题是，afterMigrate.sql 脚本被调用了两次，您可以从以下日志中看到：
2017-07-03 13:12:42.332 INFO 23222 --- [ main] o.f.core.internal.command.DbClean : Successfully cleaned schema "PUBLIC" (execution time 00:00.031s)
2017-07-03 13:12:42.397 INFO 23222 --- [ main] o.f.core.internal.command.DbValidate : Successfully validated 4 migrations (execution time 00:00.044s)
2017-07-03 13:12:42.413 INFO 23222 --- [ main] o.f.c.i.metadatatable.MetaDataTableImpl : Creating Metadata table: "PUBLIC"."schema_version"
2017-07-03 13:12:42.428 INFO 23222 --- [ main] o.f.core.internal.command.DbMigrate : Current version of schema "PUBLIC": << Empty Schema >>
2017-07-03 13:12:42.430 INFO 23222 --- [ main] o.f.core.internal.command.DbMigrate : Migrating schema "PUBLIC" to version 1 - create users
2017-07-03 13:12:42.449 INFO 23222 --- [ main] o.f.core.internal.command.DbMigrate : Migrating schema "PUBLIC" to version 2 - create address
2017-07-03 13:12:42.464 INFO 23222 --- [ main] o.f.core.internal.command.DbMigrate : Migrating schema "PUBLIC" to version 3 - create patient case
2017-07-03 13:12:42.475 INFO 23222 --- [ main] o.f.core.internal.command.DbMigrate : Migrating schema "PUBLIC" to version 4 - state machine
2017-07-03 13:12:42.498 INFO 23222 --- [ main] o.f.core.internal.command.DbMigrate : Successfully applied 4 migrations to schema "PUBLIC" (execution time 00:00.086s).
2017-07-03 13:12:42.499 INFO 23222 --- [ main] o.f.c.i.c.SqlScriptFlywayCallback : Executing SQL callback: afterMigrate
2017-07-03 13:12:42.502 INFO 23222 --- [ main] o.f.c.i.c.SqlScriptFlywayCallback : Executing SQL callback: afterMigrate
2017-07-03 13:12:42.917 INFO 23222 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
如果我删除 flyway.clean() 函数调用，它只会被调用一次。
有人能告诉我为什么当我调用 flyway.clean() 和 flyway.migrate() 时它被调用了两次，以及如何防止第二次调用？
【问题讨论】：
标签： spring spring-boot flyway