adbm-rethinkdb

RethinkDB adapter for adbm database migration tool.

Installation

npm install adbm-rethinkdb

Helpers

This adapter contains a series of helper functions meant to simplify a few common migration tasks. These helper functions have been taken from the now deprecated reconsider module, as has their documentation. Each of these functions will return a database migration object, i.e. an object exposing up and down methods, which can then be exported by the migration file.

createTablesMigration

This function will return a migration that will create tables when migrating up and drop these tables when migrating down. createTablesMigration expects an array of table names.

// In file migrations/xx-create-tables.js
const helpers = require('adbm-rethinkdb/helpers')
 
module.exports = helpers.createTablesMigration([ 'first_table', 'second_table' ])

createIndexMigration

This function will return a migration that will create indices when migrating up and drop these indices when migrating down. createIndexMigration expects an array of index specifications. Each index specification is an object containing a table and an index property, and optionally an options object and/or a spec function. An options object can be anything that r.indexCreate() accepts, while the spec property must be a function that returns an index definition (which, again, can be anything that r.indexCreate() accepts). spec will be passed the rethinkdbdash instance when it is executed.

// In file migrations/xx-create-indices.js
const helpers = require('adbm-rethinkdb/helpers')
const table = 'first_table'
 
module.exports = helpers.createIndexMigration([
  { table, index: 'someProp' }, // Simple index
  { table, index: 'compoundIndex', spec: (r) => [ r.row('firstProp'), r.row('secondProp') ] }, // Compound index
  { table, index: 'geoProp', options: { geo: true } }, // Geo index
  { table, index: 'multiIndex', options: { multi: true } }, // Multi index
  { table, index: 'arbitraryExpr', spec: (r) => (doc) => r.branch(doc.hasFields('foo'), doc('foo'), doc('bar')) } // Index based on an arbitrary expression
])

Testing

Running tests requires a rethinkdb database. You can either point the tests to your own rethinkdb server using environment variables (see below) or use the included docker:db npm script to spin up a docker container called adbm_rethinkdb_dev_db that will provide you with a basic rethinkdb server. After that, you'll simply want to:

npm run test

Environment Variables

const dbConfig = {
  host: process.env.DB_HOST || 'localhost',
  port: process.env.DB_PORT,
  authKey: process.env.DB_AUTH_KEY,
  db: process.env.DB_NAME || 'adbm_rethinkdb'
}

I.e. when supplying no configuration, tests will attempt to connect to localhost on the default port and will attempt to use the adbm_rethinkdb database (which will be created if it does not already exist).

Author

Michael Smesnik at tailored apps

License

MIT