What are the properties of the StrongLoop Loopback 'Datasource' Object? - loopbackjs

Question

I am working on a custom boot script that will autoupdate (sync database to loopback models) for only SOME of my Loopback models (so as to not over-ride schema changes made by other apps / devs on DBs I connect to inadvertently).
Right now I am using the following in my bootscript to get the datasource object for each of my connected datasources:
var postgres = app.dataSources.AWSPostgres;
The two pieces of data I would love to be able to pull from the above object are:
The name of the datasource (String)
An array of Models that are being stored in that DataSource (Array)
The problem is that I can't find any documentation reference to the properties of the individual dataSource objects.
If I can get the name of the dataSource from the object above (in the case of the example the name would be 'AWSPostgres') then I can create an array of the datasources I would like to make available for Autoupdate thereby exempting the datasources where I DO NOT want to overwrite the existing schema.

Answer 1

So I was able to list the properties of the individual datasource connector object using the following bit of code:
console.log("Show properties... ", Object.keys(datasource.connector));
Properties for a Loopback Datasource Connector
[ '_models',
'name',
'settings',
'dataSource',
'client',
'log',
'logger',
'_mixins',
'observe',
'removeObserver',
'clearObservers',
'notifyObserversOf',
'_notifyBaseObservers',
'notifyObserversAround' ]
For my purposes I was able to pull the name out of... wait for it... the datasource.connector.name property.
For those wondering, datasource.connector._models is an array of the models attached to a given datasource. To get about the names of each model attached to that datasource you would do something like this (I am using Lodash which I recommend):
_.forEach(datasource.connector._models, function(datasourceModel) {
console.log("Model name is... " + datasourceModel.model.modelName);
});
The above loops through each model in the datasource.connector._models array and logs the modelName to the console, that will give you a list of the models attached to a given datasource which is usable inside of a Loopback boot script.

Answer 2

For anyone wondering what my final boot script looked like (which sets up to autoupdate ALL models on only SOME datasources) here is my full code:
var _ = require('lodash');
module.exports = function (app) {
'use strict'
//Define Postgres_Local Datasource and Models
var postgres_local = app.dataSources.LocalPostgres;
//Define Postgres_aws Datasource and Models to AutoUpdate
var postgres_aws = app.dataSources.AWSPostgres;
//Define Mongo Datasource and Models
var mlab_Mongo = app.dataSources.mlab_Mongo;
//Define MySQL Datasource and Models
var mysql = app.dataSources.mysql;
// Only the Datasources listed in this array will have their Models AutoUpdated
var datasources = [postgres_aws, mysql];
console.log('-- Datasources to Autoupdate: ' + datasources.length);
//Loop through all specified datasources and models to autoupdate where necessary
_.forEach(datasources, function(datasource) {
console.log("Working on... " + datasource.connector.name);
var currentDataSource = datasource;
_.forEach(datasource.connector._models, function(datasourceModel) {
console.log("Cheking if table for model " + datasourceModel.model.modelName + " is created and up-to-date in " + datasource.connector.name + " DB.");
currentDataSource.isActual(datasourceModel.model.modelName, function (err, actual) {
if (actual) {
console.log("Model " + datasourceModel.model.modelName + " is up-to-date. No auto-update necessary.");
} else {
console.log('Difference found! Auto-updating model ' + datasourceModel.model.modelName + '...');
currentDataSource.autoupdate(datasourceModel.model.modelName, function () {
console.log("Auto-updated model " + datasourceModel.model.modelName + " in " + datasource.connector.name + " datasource successfully.");
});
}
});
});
});
} // End Exports