See also:

Oracle installer command

Note: This page was generated from the loopback-example-database README.

loopback-example-database

A tutorial for basic database related features.

Data sources
- Creating
- Configuring
Models
- Creating
Automigration
Instance introspection (Discovery)

Database specific tutorials

Database specific tutorials are on separate branches. The master branch containsthe tutorial for MongoDB.

For example, to view the MySQL example:

Before starting this tutorial, make sure you have the following installed:

Node
NPM


npm install
npm start

1. Create a new LoopBack app

App info

Name: loopback-example-database
Dir to contain the project: loopback-example-database

lb app loopback-example-database
     _-----_
    |       |    ╭──────────────────────────╮
    |--(o)--|    │  Let's create a LoopBack │
   `---------´   │       application!       │
    ( _´U`_ )    ╰──────────────────────────╯
    /___A___\   /
     |  ~  |
   __'.___.'__
 ´   `  |° ´ Y `
? What's the name of your application? loopback-example-database
? Enter name of the directory to contain the project: loopback-example-database
     info change the working directory to loopback-example-database
? Which version of LoopBack would you like to use? 3.x (current)
? What kind of application do you have in mind? empty-server (An empty LoopBack API, without any c
onfigured models or datasources)

cd loopback-example-database
npm install --save loopback-connector-mongodb

3. Create a data source

Data source info

Data source name:
Select the connector for accountDS: MongoDB

lb datasource accountDS
... # follow the prompts

4. Configure the data source

For the purposes of this example, we will use a preconfigured StrongLoop MongoDBserver. Edit server/datasources.json to set the MongoDB configs:

lb model
... # follow the prompts

Model Info

Model name: Account
Attach Account to: accountDS (mongodb)
Base class: PersistedModel
Custom plural form: Leave blank
Properties:
- email
  - String
  - Not required
- createdAt
  - Date
  - Not required
- lastModifiedAt
  - Date
  - Not required

slc loopback:model Account
... # follow the prompts

6. Create the collection with sample data - Automigration

With the account model configured, we can generate the correspondingMongoDB collection using the info from the Account metadata in via auto-migration.

Start by creating a dir to store general-purpose scripts:

mkdir bin

Inside that dir, create a script named .To create the Account collection and create two sample accounts, run:

node bin/automigrate.js

WARNING

The automigrate function creates a new collection if it doesn’t exist. Ifthe collection already exists, it will be destroyed and it’s data will bedeleted. If you want to keep this data, use autoupdate instead.

You should see:

7. View data using the explorer

node .

Then to view the existing account data, browse to localhost:3000/explorer andclick:

GET /Accounts
Try it out!You should see:

[
  {
    "email": "foo@bar.com",
    "createdAt": "2015-10-23T00:58:09.280Z",
    "lastModifiedAt": "2015-10-23T00:58:09.280Z",
    "id": "562986213ea33440575c6587"
  },
  {
    "email": "baz@qux.com",
    "createdAt": "2015-10-23T00:58:09.280Z",
    "lastModifiedAt": "2015-10-23T00:58:09.280Z",
    "id": "562986213ea33440575c6588"
  }
]

Try out some of the other endpoints to get a feel for how explorer works.

The LoopBack MongoDB connector does not support discovery. However, you can useinstance instrospection, which creates a LoopBack model from an existingJavaScript object.

To do this, create a script named in the bin dir. Then run:

node bin/instance-introspection