nxus-storage

Storage Module

A storage framework for Nxus applications using waterline.

Configuration

"config": {
  "storage": {
    "adapter": {
      "default": "sails-mongo"
    },
    "connections": {
      "default": {
        "adapter": "default",
        "url": "mongodb://...."
      }
    },
    "modelsDir": "./src/models"
  }
}

Creating models

Inherit your models from BaseModel

import {BaseModel} from '@nxus/storage'

var User = BaseModel.extend({
  identity: 'user',
  attributes: {
    name: 'string'
  }
})

Register models

Either import your model class and pass it to model():

storage.model(modelClass)

Or register all models in a directory with modelDir():

storage.modelDir(__dirname+"/models")

Model events

The storage model emits events for create, update, and destroy, you can register a handler for all events:

  storage.on('model.create', (identity, record) => {})
  storage.on('model.update', (identity, record) => {})
  storage.on('model.destroy', (identity, record) => {})

Or just a specific model identity:

  storage.on('model.create.user', (identity, record) => {})
  storage.on('model.update.user', (identity, record) => {})
  storage.on('model.destroy.user', (identity, record) => {})

Lifecycle notes

• load

  • Models should be registered during load, e.g. var User = BaseModel.extend({ identity: 'user', ... }); application.get('storage').model(User)

• startup

  • The configured database is connected during load.after

  • You can query models from startup and beyond, retrieve the model by the 'identity':

    application.get('storage').getModel('user').then((User) => {
        User.create(...);
    });

API

Storage

Extends NxusModule

Storage provides a common interface for defining models. Uses the Waterline ORM.

model

Register a model

Parameters

• model object A Waterline-compatible model class

Examples

storage.model(...)

getModel

Request a model based on its identity (name)

Parameters

• id (string | array) The identity of a registered model, or array of identities

Examples

storage.getModel('user')

Returns Promise The model class(es)

modelDir

Register all models in a directory

Parameters

• dir string Directory containing model files

Examples

application.get('storage').model(...)

Returns Promise Array of model identities

HasModels

Extends NxusModule

The HasModels class is a Base class for defining helper classes with Models. All models contained in a ./models directory will be registered automatically, and are the default list of model identities made available in the this.models object. You may override or extend this list of model identities, or a mapping of model identities to variable names, by overriding .modelNames()

modelNames

Deprecated: Override to define the model names to access

Examples

modelNames() { 
  return ['user']
}

Returns (array | object) Model identities to add to this.models, or object of {identity: name}