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loopback-connector-dashdb

IBM® DashDB® is the database of choice for robust, enterprise-wide solutions handling high-volume workloads. It is optimized to deliver industry-leading performance while lowering costs. The loopback-connector-dashdb module is the LoopBack connector for dashDB.

The LoopBack DashDB connector supports:

All CRUD operations.
Queries with fields, limit, order, skip and where filters.
All supported DASHDB LUW versions as well as dashDB. Note for dashDB set supportDashDB in the loopback datasource definition. Column organized tables are not supported.

Installation

Enter the following in the top-level directory of your LoopBack application:

$ npm install loopback-connector-dashdb --save

The --save option adds the dependency to the application’s package.json file.

Configuration

Use the data source generator (slc loopback:datasource) to add the DASHDB data source to your application. The entry in the application’s server/datasources.json will look something like this:

"mydb": {
  "name": "mydb",
  "connector": "dashdb"
}

Edit server/datasources.json to add other supported properties as required:

"mydb": {
  "name": "mydb",
  "connector": "dashdb",
  "username": <username>,
  "password": <password>,
  "database": <database name>,
  "hostname": <dashdb server hostname>,
  "port":     <port number>
}

The following table describes the connector properties.

Property	Type	Description
database	String	Database name
schema	String	Specifies the default schema name that is used to qualify unqualified database objects in dynamically prepared SQL statements. The value of this property sets the value in the CURRENT SCHEMA special register on the database server. The schema name is case-sensitive, and must be specified in uppercase characters
username	String	DASHDB Username
password	String	DASHDB password associated with the username above
hostname	String	DASHDB server hostname or IP address
port	String	DASHDB server TCP port number
useLimitOffset	Boolean	LIMIT and OFFSET must be configured on the DASHDB server before use (compatibility mode)
supportDashDB	Boolean	Create ROW ORGANIZED tables to support dashDB.

Alternatively, you can create and configure the data source in JavaScript code. For example:

var DataSource = require('loopback-datasource-juggler').DataSource;
var DASHDB = require('loopback-connector-dashdb');

var config = {
  username: process.env.DASHDB_USERNAME,
  password: process.env.DASHDB_PASSWORD,
  hostname: process.env.DASHDB_HOSTNAME,
  port: 50000,
  database: 'SQLDB',
};

var db = new DataSource(DASHDB, config);

var User = db.define('User', {
  name: { type: String },
  email: { type: String },
});

db.autoupdate('User', function(err) {
  if (err) {
    console.log(err);
    return;
  }

  User.create({
    name: 'Tony',
    email: 'tony@t.com',
  }, function(err, user) {
    console.log(err, user);
  });

  User.find({ where: { name: 'Tony' }}, function(err, users) {
    console.log(err, users);
  });

  User.destroyAll(function() {
    console.log('example complete');
  });
});