moleculer-db-adapter-macrometa

Moleculer Data access service for MacroMeta.co.

Features

• auto creating collection
• raw C8QL queries
• save & execute named queries
• subscription to collection changes

Install

npm install moleculer-db-adapter-macrometa --save

Usage

"use strict";

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

const broker = new ServiceBroker();

// Create a Sequelize service for `post` entities
broker.createService({
    name: "posts",
    mixins: [DbService],
    adapter: new MacroMetaAdapter({
        config: "https://gdn1.macrometa.io",

        auth: {
            email: "[email protected]",
            password: "secretpass"
        },

        tenant: null, // use default
        fabric: null // use default
    }),
    collection: "posts" // Name of collection
});


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:

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

Subscribe to changes

// posts.service.js
module.exports = {
    name: "posts",
    adapter: new MacroMetaAdapter(),
    methods: {
        onChanges(payload) {
            this.logger.info("Collection has been changed", payload);
        }
    },
    async started() {
        await this.adapter.subscribeToChanges((err msg) => {
            if (err)
                return this.logger.error("Subscription error", err);

            this.onChanges(msg.payload);
        });
    },

    async stopped() {
        await this.adapter.unsubscribeFromChanges();
    }
}

Named queries

await this.adapter.saveQuery(name, query, parameters);
await this.adapter.executeSavedQuery(name,variables);

Test

$ npm test

In development with watching

$ npm run ci

Contribution

Please send pull requests improving the usage and fixing bugs, improving documentation and providing better examples, or providing some testing, because these things are important.

License

The project is available under the MIT license.

Contact

Copyright (c) 2019 MoleculerJS