bookshelf-consul-pilot

bookshelf-consul-pilot

Installation

Your database connection file might look something like this:

const BookshelfConsulPilot = require('bookshelf-consul-pilot');
const knexfile = require('../../knexfile').development;
const path = require('path');

// Argument 1: The knex config that you would use to instantiate Bookshelf
// Argument 2: The Consul database service name to listen for changes in connections on
// Argument 3: The path to your Bookshelf models folder that bookshelf-consul-pilot will read models from
// Argument 4: A function for configuring Bookshelf plugins. This will called every time a new connection is reported
// Argument 5: Optionally bypass the new connection watching by passing true. Useful for dev and in some cases unit testing
module.exports = new BookshelfConsulPilot(knexfile, 'database', path.join(__dirname, '/../models'), (bookshelf) => {
    bookshelf.plugin('pagination');
    bookshelf.plugin(require('bookshelf-signals')());
});

Usage

Defining Models

Ensure that your model files are wrapped in a function that accepts bookshelf as an argument:

module.exports = (bookshelf) => {
    return bookshelf.Model.extend({
        tableName: 'books',
    });
};

Querying

// include the file created in the Installation step
const db = require('database');

// you can fetch the bookshelf and knex instances like so
// db.bookshelf
// db.knex

function getBooks() {
    // when using Bookshelf models, always fetch the model instance like so. The 'book' argument is
    // the filename of your model in the models directory you specified in the Installation step
    db.model('book').fetchPage()
        .then((books) => {
            console.log(books);
        });
}

Registering Events

Anything that must modify the Bookshelf instance or its models must be wrapped in a register. This allows bookshelf-consul-pilot to completely reset the Bookshelf instance if a new connection were to be reported. An example is events using the bookshelf-signals plugin:

const db = require('database');

db.register((bookshelf) => {

    bookshelf.on('created', db.model('book'), (model) => {
        console.log('created fired!');
    });

    bookshelf.on('updated', db.model('book'), (model) => {
        console.log('updated fired!');
    });

});