emilsolgaard1 / java-api-migrations

Database Migrations

Learning Objectives

• Use database migrations to manage changes to table structures
• Use Flyway to manage database migrations

Instructions

1. Fork this repository
2. Clone your fork to your machine
3. Open the project in IntelliJ

Core Activity

• Following on from the activity we did previously to build a Film Database, start by modifying your Flyway Config to point at the db/migrations directory in this project.
• Connect things up so that you will be creating the database on ElephantSQL as before.
• In the migrations directory use Flyway to initially create a monolithic table to match the structure shown below.

ID	Title	Director	Director Country	Star	Star DOB	Writer	Writer Email	Year	Genre	Score
1	2001: A Space Odyssey	Stanley Kubrick	USA	Keir Dullea	30/05/1936	Arthur C Clarke	[email protected]	1968	Science Fiction	10
2	Star Wars: A New Hope	George Lucas	USA	Mark Hamill	25/09/1951	George Lucas	[email protected]	1977	Science Fiction	7
3	To Kill A Mockingbird	Robert Mulligan	USA	Gregory Peck	05/04/1916	Harper Lee	[email protected]	1962	Drama	10
4	Titanic	James Cameron	Canada	Leonardo DiCaprio	11/11/1974	James Cameron	[email protected]	1997	Romance	5
5	Dr Zhivago	David Lean	UK	Julie Christie	14/04/1940	Boris Pasternak	[email protected]	1965	Historical	8
6	El Cid	Anthony Mann	USA	Charlton Heston	04/10/1923	Frederick Frank	[email protected]	1961	Historical	6
7	Voyage to Cythera	Theodoros Angelopoulos	Greece	Manos Katrakis	14/08/1908	Theodoros Angelopoulos	[email protected]	1984	Drama	8
8	Soldier of Orange	Paul Verhoeven	Netherlands	Rutger Hauer	23/01/1944	Erik Hazelhoff Roelfzema	[email protected]	1977	Thriller	8
9	Three Colours: Blue	Krzysztof Kieslowski	Poland	Juliette Binoche	09/03/1964	Krzysztof Kieślowski	[email protected]	1993	Drama	8
10	Cyrano de Bergerac	Jean-Paul Rappeneau	France	Gerard Depardieu	27/12/1948	Edmond Rostand	[email protected]	1990	Historical	9

• Then work through the process of adding scripts to migrate the database structure until you end up with a normalised database similar to the one you had in the previous activity.
• When you have reached that point, then you can add a further script that will add in the data shown to the completed database.
• For an extra challenge you could make use of some of the data that can be found in the datasets here to use some real data, but don't spend too long on it (also don't try to add to much data to your database).

Extension Activity

• Modify the database structure further to bring in additional tables (such as Cast) which will link together a film id with multiple actors.
• Modify the database so that Actors, Directors and Writers are all references to a Person table (that way the same person can have multiple roles in a film.)