Contents
How do I use a flyway with an existing database?
These are the steps to follow to successfully integrate Flyway in a project with an existing database.
- Take a DDL and reference data extract from production.
- Clean all databases containing data you don’t mind losing.
- Align the remaining databases with production.
- Give these databases a baseline version.
- Done !
What is DB migration in spring boot?
Spring Boot makes this integration very simple. You only need to add a dependency for Liquibase or Flyway and put a description of your database update operations in the default folder. Spring Boot then provides a default configuration and triggers the migration.
What does it mean to migrate data from one database to another?
Database migration is the process of migrating data from one or more source databases to one or more target databases by using a database migration service. When a migration is finished, the…
When to apply migrations to a production database?
Whatever your deployment strategy, always inspect the generated migrations and test them before applying to a production database. A migration may drop a column when the intent was to rename it, or may fail for various reasons when applied to a database. The recommended way to deploy migrations to a production database is by generating SQL scripts.
When is a database migration valid in EF Core?
If EF Core’s Model of the database schema does match the database, then you can get errors occurring in queries or writes. I refer to the migration script as creating a “valid” database if it matches EF Core’s Model of that database. The validity of a migrations created by EF Core isn’t in doubt – EF Core created it so it will be valid.
Why did my migration fail in SQL Server?
A migration may drop a column when the intent was to rename it, or may fail for various reasons when applied to a database. The recommended way to deploy migrations to a production database is by generating SQL scripts. The advantages of this strategy include the following: