npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

migrate-orm2

v5.0.0

Published

A library providing migrations using ORM2's model DSL leveraging Visionmedia's node-migrate.

Downloads

21

Readme

migrate-orm2

Known Vulnerabilities

Migrations using ORM2's model DSL leveraging Visionmedia's node-migrate.

Heads up ! v3 introduce some major changes, make sure you check the changelog

Installation

npm install migrate-orm2

Usage

The example below uses MySQL. Locomote uses migrate-orm2 with Postgres. Testing was also done with SQLite3, though some driver issues were encountered.

Build a connection & construct the migrate-orm2 Task object:

const orm         = require('orm');
const MigrateTask = require('migrate-orm2');

orm.connect(connectionString, function (err, connection) {
  if (err) throw err;

  const task = new MigrateTask(connection.driver, { extensions: ['js', 'ts'] });
});

Options

  • coffee: enable coffeescript v1 support (default: false)
  • dir: migrations directory (default: "migrations")
  • extensions: file extensions of supported migration files (default: ['js'])
  • logger: defaults to using console

The Task constructor function can support options allowing for a custom migrations directory and/or coffeescript support (see 'Usage - opts' below).

A Task object offers three operations - generate, up and down.

Usage - generate

> task.generate('create-users', function(err, result){});
>   create : /Users/nicholasf/code/locomote/node-migrate-orm2/migrations/001-create-users.js

The 'migrations' folder is the default but can be overridden in the opts argument (see 'Usage - opts' below).

A skeleton migration file now exists and can be populated with the ORM2 DSL.

A simple example, taken from the tests:

exports.up = function (next) {
  this.createTable('test_table', {
    id     : { type : "serial", key: true }, // auto increment
    name   : { type : "text", required: true }
  }, next);
};

exports.down = function (next){
  this.dropTable('test_table', next);
};

You can also write Promise-based migrations, same example, but with no callbacks specified:

exports.up = function () {
  return this.createTable('test_table', {
    id     : { type : "serial", key: true }, // auto increment
    name   : { type : "text", required: true }
  });
};

exports.down = function (){
  return this.dropTable('test_table');
};

Both createTable and dropTable, along with other MigrationDSL methods return promises if callback is not specified. Look here for more examples.

Another example for adding or dropping a column:

exports.up = function(next){
  this.addColumn('agency', preferredProvider: {type: "text", defaultValue: '1G', required: true}, next);
}

exports.down = function(next){
  this.dropColumn('agency', 'preferredProvider', next);
}

An example of adding an index:

exports.up = function (next) {
  this.addIndex('agency_email_idx', {
    table: 'agency',
    columns: ['email'],
    unique: true
  }, next);
};

exports.down = function (next) {
  this.dropIndex('agency_email_idx', 'agency', next);
};

There are no built-in operations for inserting, updating, or deleting row data contained in tables. The execQuery operation, which can be used to execute any custom queries, can however be used to perform such actions:

exports.up = function (next) {
  this.execQuery('INSERT INTO agency (email) VALUES (?)', ['[email protected]'], next);
};

exports.down = function (next) {
  this.execQuery('DELETE FROM agency WHERE email = ?', ['[email protected]'], next);
};

The full list of operations available through this:

  • createTable
  • renameTable
  • dropTable
  • addColumn
  • dropColumn
  • addIndex
  • dropIndex
  • addPrimaryKey
  • dropPrimaryKey
  • addForeignKey
  • addForeignKeyConstraint
  • dropForeignKey
  • dropForeignKeyConstraint
  • execQuery

These operations are depicted in the examples folder.

We would like to add modifyColumn functionality in the future.

Usage - up

> task.up(function(e,r){});
>   up : migrations/001-create-users.js
  migration : complete

Alternatively, when there are many migrations, a filename can be specified:

> task.generate('create-servers', function(err, result){});
>   create : /Users/nicholasf/code/locomote/node-migrate-orm2/migrations/002-create-servers.js

> task.up('001-create-users.js', function(e,r){})
>   up : migrations/001-create-users.js
  migration : complete

This means 'run up to this migration then execute its up function, then stop.'

Usage - down

> task.down(function(e,r){});
>   down : migrations/001-create-users.js
  migration : complete

This means 'rollback the last migration'.

If there are many migrations to rollback a limit can be specified.

> task.down('001-create-users.js', function(e,r){});
>   down : migrations/001-create-users.js
  migration : complete

This means 'rollback all migrations including 001-create-users.js'

Usage - the orm_migrations table

Migrate-orm2 maintains an internal orm_migrations table which allows it to run from previous state.

The table contains a list of migrations applied to the database. By comparing these and the migration files, we can decide on which migrations to run.

mysql> select * from orm_migrations;
+---------------------+
| migration           |
+---------------------+
| 001-create-users.js |
+---------------------+
1 rows in set (0.00 sec)

Usage - opts

The Task object can be modified to work from a different directory or to generate and cooperate with coffee-script migrations.

var task = new Task(connection, {dir: 'data/migrations', coffee: true});

Usage - orm-migrate

See https://github.com/nicholasf/node-orm-migrate for a command line tool.

♪  node-orm-migrate git:(master) ✗ migrate --help

  Usage: migrate [options]

  Options:

    -h, --help      output usage information
    -V, --version   output the version number
    -g, --generate  Generate a migration
    -u, --up        Run up migrations
    -d, --down      Run down migrations

Usage - Promises

Task methods (up, down, generate) now support Promises allong with callback. In case if you don't pass callback to those methods, they will return a Promise.

In this example task.down() will return a Promise:

> task.down();
>   down : migrations/001-create-users.js
  migration : complete

Same approach works for task.up and task.generate.

Usage - grunt

We handcraft grunt and our tasks looks this.

Firstly, we have a helper file which knows how to build the connection and opts and invoke the Task object:

var MigrationTask = require('migrate-orm2');
var orm = require('orm');

exports.runMigration = function (operation, grunt, done) {
  orm.settings.set("connection.debug", true);
  orm.connect('mysql://root@localhost/ninja', function (err, connection) {
    if (err) throw(err);

    var migrationTask = new MigrationTask(
      connection.driver,
      { dir: 'data/migrations'}
    );
    migrationTask[operation](grunt.option('file'), done);
  });
};

Registering the Grunt tasks looks like this:

grunt.registerTask('migrate:generate', '', function () {
  var done = this.async();
  require('./tasks/db').runMigration('generate', grunt, done);
});

grunt.registerTask('migrate:up', '', function () {
  var done = this.async();
  require('./tasks/db').runMigration('up', grunt, done);
});

grunt.registerTask('migrate:down', '', function () {
  var done = this.async();
  require('./tasks/db').runMigration('down', grunt, done);
});

To generate a migration file or to indicate a direction:

grunt migrate:generate --file=create-users
grunt migrate:generate --file=create-servers
grunt migrate:up --file=001-create-users.js

Running Tests

Please note - running all of the tests together can produce database connection pooling problems. We are currently considering these.

Tests work in isolation and when the database is tuned for a greater amount of database connections.

Create test/config.js (see test/config.example.js for instructions)

npm test

This will run the tests against all configurations inside config.js. To run against a single config:

ORM_PROTOCOL=mysql node test/run
# OR
ORM_PROTOCOL=mysql mocha test/integration

Guideline to Contributing

Contributions are welcome. If you want to discuss or request a feature, please open an issue.

We will ask for test coverage of Pull Requests for most issues. Please see the current testing strategy in test/integration.

Contributors

  • nicholasf
  • dxg
  • vaskas
  • benkitzelman
  • sidorares
  • wolfeidau
  • damsonn

This work is a melding of two underlying libraries: