Migration

Migration

A Migration provides functionality for adding and rolling back changes to the schema of a relational database.

public protocol Migration

Requirements

up(schema:​)

The schema changes that should be run when applying this migration to a database.

func up(schema: Schema)

Parameters

• schema: The schema to build changes on.

down(schema:​)

The schema changes that should be run when rolling back this migration to a database.

func down(schema: Schema)

Parameters

• schema: The schema to build changes on.