[Node.js] Create a model to persist data in a Node.js LoopBack API

In this lesson you will learn what a LoopBack model is, you will create a Product model using the LoopbBack CLI. The product model will be based off the built-in PersistedModel which gives it basic functionality like Create, Ready, Update, Delete and some more. Using the API Explorer you can interact with the new model, store, retrieve, edit and delete the product data.

Create a REST API model:

lb model

Give the information needed, it can generate all the rest api.

There are few files will be created.

common/models/[model_name].js

common/models/[model_name].json

There is one file will be modified:

server/model-config.json:

  "Product": {
    "dataSource": "db",
    "public": true
  }

So if you want to remove the model, you can delete those generated stuff.

If the data are stored in memory, it means once you restart the server, the data will lost, one way to keep the data for development:

datasources.json:

{
  "db": {
    "name": "db",
    "connector": "memory",
    "file": "db.json"
  }
}

Add "file" prop, it will store data inside the db.json.