我有一个现有的数据库。我创建了两个迁移
$ ls src/main/resources/db/migration/
V1__create_stats.sql V2__create_sources.sql
我在application.properties
# Prevent complaints when starting migrations with existing tables.
flyway.baselineOnMigrate = true
否则会出现错误org.flywaydb.core.api.FlywayException: Found non-empty schema
galaxybadge without metadata table! Use baseline() or set baselineOnMigrate to true to initialize the metadata table.
当我尝试启动应用时,它会跳过迁移并且不会执行它们!我在MySQL中使用show tables;
并看到它们不存在!
>mvn spring-boot:run
...
2018-05-09 18:43:03.671 INFO 24520 --- [ restartedMain] o.f.core.internal.util.VersionPrinter : Flyway 3.2.1 by Boxfuse
2018-05-09 18:43:04.420 INFO 24520 --- [ restartedMain] o.f.c.i.dbsupport.DbSupportFactory : Database: jdbc:mysql://localhost:3306/galaxybadge (MySQL 5.5)
2018-05-09 18:43:04.486 INFO 24520 --- [ restartedMain] o.f.core.internal.command.DbValidate : Validated 0 migrations (execution time 00:00.030s)
2018-05-09 18:43:04.704 INFO 24520 --- [ restartedMain] o.f.c.i.metadatatable.MetaDataTableImpl : Creating Metadata table: `galaxybadge`.`schema_version`
2018-05-09 18:43:05.116 INFO 24520 --- [ restartedMain] o.f.core.internal.command.DbBaseline : Schema baselined with version: 1
2018-05-09 18:43:05.145 INFO 24520 --- [ restartedMain] o.f.core.internal.command.DbMigrate : Current version of schema `galaxybadge`: 1
2018-05-09 18:43:05.146 INFO 24520 --- [ restartedMain] o.f.core.internal.command.DbMigrate : Schema `galaxybadge` is up to date. No migration necessary.
我看了this answer但它没有帮助,似乎给了错误的属性名称。这是它创建的schema_version
表。
> select * from schema_version;
+--------------+----------------+---------+-----------------------+----------+-----------------------+----------+--------------+---------------------+----------------+---------+
| version_rank | installed_rank | version | description | type | script | checksum | installed_by | installed_on | execution_time | success |
+--------------+----------------+---------+-----------------------+----------+-----------------------+----------+--------------+---------------------+----------------+---------+
| 1 | 1 | 1 | << Flyway Baseline >> | BASELINE | << Flyway Baseline >> | NULL | root | 2018-05-09 18:43:05 | 0 | 1 |
+--------------+----------------+---------+-----------------------+----------+-----------------------+----------+--------------+---------------------+----------------+---------+
Spring Boot 1.5.6,FlyWay Core 3.2.1
答案 0 :(得分:0)
好的,我发现了这个https://flywaydb.org/documentation/existing
但没有遵循它。相反,我将迁移从V1__*
和V2__*
移至V2...
和V3...
,并将生产架构下载到V1__initialize.sql
。
mysqldump -h project.us-east-1.rds.amazonaws.com -u username -p --no-data --skip-add-drop-table --compact --skip-set-charset databasename > V1__initialize.sql
然后,当我运行Spring mvn spring-boot:run
时,它运行了迁移。
(实际上有很多SQL的调试,我不得不多次删除表并从schema_verion
中删除行并删除target/.../migration/
中的旧文件名,但是这样做了#39}。另一个故事。)
我相信可以设置
flyway.baselineVersion=0
并根据以下信息跳过SQL转储(初始化):https://flywaydb.org/documentation/configfiles。但是,为未来的开发人员提供模式似乎是正确的方法。
我仍然不明白为什么它没有从原始问题中进行V2__...
迁移。如果从1开始,则仍可以运行迁移2。如果它按预期工作,那么我可能会更快地理解这个问题。
答案 1 :(得分:0)
对于已经具有现有数据库的Spring Boot应用程序,请在您的
application.yml
:
flyway:
baseline-on-migrate: true
baseline-version: 0
然后从1开始迁移脚本,例如:V1__script_description.sql
,V2__script_description.sql
,...