moleculer-db-adapter-sequelize

moleculer-db-adapter-sequelize

SQL adapter (Postgres, MySQL, SQLite & MSSQL) for Moleculer DB service with Sequelize.

Features

Install

$ npm install moleculer-db-adapter-sequelize sequelize --save

You have to install additional packages for your database server:

# For SQLite
$ npm install sqlite3 --save

# For MySQL
$ npm install mysql2 --save

# For MariaDB
$ npm install mariadb --save

# For PostgreSQL
$ npm install pg pg-hstore --save

# For MSSQL
$ npm install tedious --save

Usage

"use strict";

const { ServiceBroker } = require("moleculer");
const DbService = require("moleculer-db");
const SqlAdapter = require("moleculer-db-adapter-sequelize");
const Sequelize = require("sequelize");

const broker = new ServiceBroker();

// Create a Sequelize service for `post` entities
broker.createService({
    name: "posts",
    mixins: [DbService],
    adapter: new SqlAdapter("sqlite://:memory:"),
    model: {
        name: "post",
        define: {
            title: Sequelize.STRING,
            content: Sequelize.TEXT,
            votes: Sequelize.INTEGER,
            author: Sequelize.INTEGER,
            status: Sequelize.BOOLEAN
        },
        options: {
            // Options from http://docs.sequelizejs.com/manual/tutorial/models-definition.html
        }
    },
});


broker.start()
// Create a new post
.then(() => broker.call("posts.create", {
    title: "My first post",
    content: "Lorem ipsum...",
    votes: 0
}))

// Get all posts
.then(() => broker.call("posts.find").then(console.log));

Raw queries

You can reach the sequelize instance via this.adapter.db. To call Raw queries:

    actions: {
        findHello2() {
            return this.adapter.db.query("SELECT * FROM posts WHERE title = 'Hello 2' LIMIT 1")
                .then(([res, metadata]) => res);
        }
    }

Options

Every constructor arguments are passed to the Sequelize constructor. Read more about Sequelize connection.

Example with connection URI

new SqlAdapter("postgres://user:pass@example.com:5432/dbname");

Example with connection options

new SqlAdapter('database', 'username', 'password', {
    host: 'localhost',
    dialect: /* one of 'mysql' | 'mariadb' | 'postgres' | 'mssql' */,

    pool: {
        max: 5,
        min: 0,
        idle: 10000
    },

    // SQLite only
    storage: 'path/to/database.sqlite'
});

Test

$ npm test

In development with watching

$ npm run ci

License

The project is available under the MIT license.

Contact

Copyright (c) 2016-2022 MoleculerJS