Practical uses for Database Models with Flyway

A database model is a standard document that represents the logical design and structure of a database. If we save a model each time Flyway creates a new version of the database, then we can find out what's in each version, and get an overview of how the database structure changed between versions. This has all sorts of useful applications during development to help us automate those repetitive tasks that otherwise slow down delivery. Read more

Better Database Development: The Role of Test Data Management

Any organization that aims for reliable, online deployment of database changes needs a Test Data Management (TDM) strategy that allows developers to test the database early, thoroughly, and repeatedly, with the right test data. The benefits include more resilient database deployments, fewer bugs, and shorter lead time for changes. Read more

Working with Flyway and Entity Framework Code First: Automation

This article will demonstrate how to automate a hybrid database change management system that uses Entity Framework Code First for development and Flyway for deployments. We automatically convert C# migrations, produced by EF, to the Flyway format and then use Flyway command line to deploy the migrations and save the 'object-level state' of each new database version, so we can track exactly which objects changed, and how, between versions. Read more

Test Data Management for Database Migrations

The main reason why database deployments fail is a lack of rigorous database testing, and the main reason this task is so often avoided, or delayed, is the difficulties of creating and managing all the required test data. This article will help you understand the steps to better test data management, as part of a database emigration strategy. It explains the different types of data required and why, and the most efficient way to create, load and switch between the different required data sets. Read more

The Flyway Desktop CLI: Automate your Database Development Process

We'll explore the Flyway Desktop CLI, also known as "flyway-dev", its capabilities, and how we might use it to automate process of capturing the schema changes made to a development database and then generating a migration script to use in subsequent deployments of those changes. Read more

Infrequently Asked Questions About Flyway

You can have Flyway up and running in minutes if you're a solo developer managing a single database. However, as you seek to 'scale up' Flyway to accommodate more complex database systems, team-based development, and stricter quality controls, you'll need to tackle some knottier questions. Without adequate answers, tasks such as multi-database management, automation and workflow, and Continuous Integration will be difficult. Hopefully, this article will help. Read more

Managing PostgreSQL Extensions Using Flyway

Any reliable DevOps deployment process must not only deliver the right database code but also ensure that the correct conditions exist for the deployment to succeed. For PostgreSQL databases, this includes ensuring that any extensions on which the database code relies are installed, and at the correct version. Fortunately, Flyway will automatically track which extensions are installed on a database and at what version, so we can 'propagate' these changes accurately during deployments and avoid inconsistencies in database behavior and even application breakages. Read more

Using SSDT and DACPACs with Flyway: a Demonstration

The aim of this article is simply to demonstrate that you can use two DACPAC files, representing the source and target versions of a SQL Server database, to create a migration file that can then be used in Flyway. Read more

Running Flyway Pre-Migration Checks on the Database

This article demonstrates how to run a preliminary check that issues a warning, or throws an error, if the conditions aren't met for a Flyway migration to succeed. It provides some example checks for PostgreSQL databases that use Flyway SQL callbacks to ensure the server is running the correct PostgreSQL version, or that the database has a required extension installed. Read more

Maintaining Variants of a Database using Flyway Locations

In this article, I'll explain why we often need to maintain variants of the same database, at a particular version. I'll demonstrate how useful variants can be for creating slightly modified installations of a database, for special uses, or even for the simple task of provisioning multiple copies of the same version. In doing so, I'll show how we can use Flyway locations to overcome problems that would otherwise require complicated solutions. Flyway can make the whole matter of maintaining database variants very easy. Read more

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