loopback-datasource-juggler/examples/load-schemas.js

var path = require('path'),
  fs = require('fs'),
  DataSource = require('../lib/datasource').DataSource;

/**
 * Load LDL schemas from a json doc
 * @param schemaFile The dataSource json file
 * @returns A map of schemas keyed by name
 */
function loadSchemasSync(schemaFile, dataSource) {
  // Set up the data source
  if (!dataSource) {
    dataSource = new DataSource('memory');
  }

  // Read the dataSource JSON file
  var schemas = JSON.parse(fs.readFileSync(schemaFile));

  return dataSource.buildModels(schemas);

}

var models = loadSchemasSync(path.join(__dirname, 'jdb-schemas.json'));

for (var s in models) {
  var m = models[s];
  console.log(m.modelName, new m());
}

models = loadSchemasSync(path.join(__dirname, 'schemas.json'));
for (var s in models) {
  var m = models[s];
  console.log(m.modelName, new m());
}