hapi-sequelizejs

hapi-sequelizejs

A hapi.js plugin to connect with Sequelize ORM.

Support me

If you like this plugin, please support my work and help maintaining it.

Thanks in advance ❤️

Compatibility

Compatible with these versions:

• hapi.js
  • 19.x
  • 20.x
• sequelize
  • 5.x
  • 6.x

Check the releases page for the changelog.

Installation

npm install hapi-sequelizejs

Configuration

Simply pass in your sequelize instance and a few basic options and voila. Options accepts a single object or an array for multiple dbs.

server.register([
    {
        plugin: require('hapi-sequelizejs'),
        options: [
            {
                name: 'dbname', // identifier
                models: [__dirname + '/server/models/**/*.js'], // paths/globs to model files
                ignoredModels: [__dirname + '/server/models/**/*.js'], // OPTIONAL: paths/globs to ignore files
                sequelize: new Sequelize(config, opts), // sequelize instance
                sync: true, // sync models - default false
                forceSync: false, // force sync (drops tables) - default false
            },
        ],
    },
]);

Model Definitions

A model should export a function that returns a Sequelize model definition (http://docs.sequelizejs.com/en/latest/docs/models-definition/).

module.exports = function (sequelize, DataTypes) {
    const Category = sequelize.define('Category', {
        name: DataTypes.STRING,
        rootCategory: DataTypes.BOOLEAN,
    });

    return Category;
};

Setting Model associations

Using the sequelize model instance, define a method called associate, that is a function, and receives as parameter all models defined.

module.exports = function (sequelize, DataTypes) {
    const Category = sequelize.define('Category', {
        name: DataTypes.STRING,
        rootCategory: DataTypes.BOOLEAN,
    });

    Category.associate = function (models) {
        models.Category.hasMany(models.Product);
    };

    return Category;
};

Database Instances

Each registration adds a DB instance to the server.plugins['hapi-sequelizejs'] object with the name option as the key.

function DB(sequelize, models) {
    this.sequelize = sequelize;
    this.models = models;
}

// something like this
server.plugins['hapi-sequelizejs'][opts.name] = new DB(opts.sequelize, models);

API

Using request object

getDb(name)

The request object gets decorated with the method getDb. This allows you to easily grab a DB instance in a route handler. If you have multiple registrations pass the name of the one you would like returned or else the single or first registration will be returned.

handler(request, reply) {
    const db1 = request.getDb('db1');
    console.log(db1.sequelize);
    console.log(db1.models);
}

If there isn't a db instance for the given name or no registered db instance, an Error is thrown: hapi-sequelizejs cannot find the ${dbName} database instance.

db.getModel('User')

Returns single model that matches the passed argument or null if the model doesn't exist.

db.getModels()

Returns all models on the db instance

getModels(dbName?)

Returns all models registered in the given db's name or the models from the first registered db instance if no name is given to the function.

handler(request, reply) {
    const models = request.getModels('db1');
    ...
}

If there isn't a db instance for the given name or no registered db instance, an Error is thrown: hapi-sequelizejs cannot find the ${dbName} database instance.

getModel(dbName, modelName?)

Return the model to the db's name instance. You may give only the model name to the function, if it's the case, it returns the model from the first registered db instance.

handler(request, reply) {
    const myModel = request.getModel('db1', 'myModel');
    ...
}

If there isn't a db instance for the given name or no registered db instance, an Error is thrown: hapi-sequelizejs cannot find the ${dbName} database instance. If there isn't a model for the given name, an Error is thrown: hapi-sequelizejs cannot find the ${modelName} model.

Without request object

To access the dbs intances without using the request object you may do this:

const instances = require('hapi-sequelizejs').instances;

instance.dbs

Returns an Object with all instances registered.

{
  [db.name]: db.instance
}

const instances = require('hapi-sequelizejs').instances;
const dbs = instances.dbs;

dbs.myDb.getModel('User');

getDb(name?)

Returns the db instance for the given name or the first registered db instance if no name is given to the function.

const instances = require('hapi-sequelizejs').instances;

const myDb = instances.getDb('myDb');

const firstRegisteredDb = instances.getDb();

If there isn't a db instance for the given name or no registered db instance, an Error is thrown: hapi-sequelizejs cannot find the ${dbName} database instance.

getModels(dbName?)

Returns all models registered in the given db's name or the models from the first registered db instance if no name is given to the function.

const instances = require('hapi-sequelizejs').instances;

const myDbModels = instances.getModels('myDb');

const firstRegisteredDbModels = instances.getModels();

If there isn't a db instance for the given name or no registered db instance, an Error is thrown: hapi-sequelizejs cannot find the ${dbName} database instance.

getModel(dbName, modelName?)

Return the model to the db's name instance. You may give only the model name to the function, if it's the case, it returns the model from the first registered db instance.

const instances = require('hapi-sequelizejs').instances;

const myDbMyModel = instances.getModel('myDb', 'myModel');

const firstRegisteredDbMyModel = instances.getModel('myModel');

If there isn't a db instance for the given name or no registered db instance, an Error is thrown: hapi-sequelizejs cannot find the ${dbName} database instance. If there isn't a model for the given name, an Error is thrown: hapi-sequelizejs cannot find the ${modelName} model.