General purpose migration framework.
This is a light weight open source package for NodeJS written with TypeScript. It's actively maintained, well tested and already used in production environments. The source code is available on GitHub where you can also find our issue tracker.
Run the command below to install the package.
$ npm install --save migratable
This package uses promises thus you need to use Promise polyfill when promises are not supported.
The package provides two core classes. The Migrator class is used for running migrations and the Seeder is used for performing seed operations.
Migrations are performed in a sequence based on the index parameter. If you pass a context object into Migrator class the object will be passed to each migration method. Methods upgrade and downgrade runs migration recipes and memorizes the last successfully performed migration index value inside the ./migratable.cache file (don't forget to add this path to .gitignore).
import { Migrator } from 'migratable';
// initialize migration class
const migrator = new Migrator({
ctx: { foo: "foo" }, // optional
cacheFilePath: "./migratable.cache", // optional
});
// register migrations (you could move this object into a separate file)
migrator.add({
index: 0, // sequence number
upgrade: async (ctx) => { /* do something */ },
downgrade: async (ctx) => { /* do something */ },
});
// run `upgrade` migrations
migrator.upgrade().then((index) => { // upgrade optionally accepts the number of steps to perform
console.log("Done!");
}).catch((err) => {
console.log(err);
});
// or `downgrade` migrations
migrator.downgrade().then((index) => { // upgrade optionally accepts the number of steps to perform
console.log("Done!");
}).catch((err) => {
console.log(err);
});You can also use migrator.addDir("./seeds") to load migrations from folder.
Seed operations are similar to migrations. The difference is only that they can be performed multiple times.
import { Seeder } from 'migratable';
// initialize migration class
const seeder = new Seeder(
ctx: { foo: "foo" }, // optional
);
// register migrations (you could move this object into a separate file)
seeder.add({
index: 0, // sequence number
perform: async (ctx) => { /* do something */ },
});
// run `perform` methods
seeder.perform().then(() => {
console.log("Done!");
}).catch((err) => {
console.log(err);
});You can also use seeder.addDir("./seeds") to load seeds from folder.
Copyright (c) 2017+ Kristijan Sedlak <xpepermint@gmail.com>
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