Setting up StrongLoop LoopBack MongoDB datasource for successful deployment on Heroku

Question

Setting up StrongLoop LoopBack MongoDB datasource for successful deployment on Heroku

Currently, I am utilizing LoopBack version 1.6 and have a local mongoDB server operational for development purposes with the following datasource configuration:

  "mongodb": {
    "defaultForType": "mongodb",
    "connector": "loopback-connector-mongodb",
    "database": "xxxdbname",
    "host": "localhost",
    "port": "27017"
  },

Now, my goal is to deploy to Heroku but I am uncertain about how to adjust the datasource settings to connect to the MongoLab database as it has a dynamically generated connection string:

Following the documentation provided by Heroku:

var mongo = require('mongodb');

var mongoUri = process.env.MONGOLAB_URI ||
  process.env.MONGOHQ_URL ||
  'mongodb://localhost/mydb';

mongo.Db.connect(mongoUri, function (err, db) {
  db.collection('mydocs', function(er, collection) {
    collection.insert({'mykey': 'myvalue'}, {safe: true}, function(er,rs) {
    });
  });
});

Hence, what modifications do I need to apply to my JSON datasource in order to accommodate the Heroku connection string?

javascript mongodb heroku loopbackjs strongloop

Answer 1

Answer №1

As of June 27, 2014, the solution for this issue has been implemented. To address it, you need to create a file named datasources.local.js with the code provided below (replace mongodb with your actual data source name):

var mongoUri = process.env.MONGOLAB_URI ||
  process.env.MONGOHQ_URL ||
  'mongodb://localhost/mydb';

module.exports = {
  mongodb: {
    defaultForType: "mongodb",
    connector: "loopback-connector-mongodb",
    url: mongoUri
  }
};

Please note: While datasources.json is still necessary (even if empty), the configuration in the newly created .js file will take precedence over the one in the existing .json file.

Answer 2

As of June 27, 2014, the solution for this issue has been implemented. To address it, you need to create a file named datasources.local.js with the code provided below (replace mongodb with your actual data source name):

var mongoUri = process.env.MONGOLAB_URI ||
  process.env.MONGOHQ_URL ||
  'mongodb://localhost/mydb';

module.exports = {
  mongodb: {
    defaultForType: "mongodb",
    connector: "loopback-connector-mongodb",
    url: mongoUri
  }
};

Please note: While datasources.json is still necessary (even if empty), the configuration in the newly created .js file will take precedence over the one in the existing .json file.

Answer 3

Answer №2

One request for LoopBack is to enhance support for configuring datasources/models using environment variables and other sources. A proposed solution involves utilizing a template engine to dynamically resolve variables in the datasources.json file.

In relation to your query, LoopBack provides the ability to configure the datasource using a 'url' property. For instance:

{
   "connector": "loopback-connector-mongodb",
   "url": "mongodb://localhost:27017/mydb" 
}

To work around this issue, you can create a post-deployment script for Heroku that replaces the url value with either process.env.MONGOLAB_URI or process.env.MONGOHQ_URL.

sed -i.bak s/MONGODB_URL/$MONGOHQ_URL/g datasources.json

In the meantime, it is suggested to log an inquiry at https://github.com/strongloop/loopback/issues.

Answer 4

One request for LoopBack is to enhance support for configuring datasources/models using environment variables and other sources. A proposed solution involves utilizing a template engine to dynamically resolve variables in the datasources.json file.

In relation to your query, LoopBack provides the ability to configure the datasource using a 'url' property. For instance:

{
   "connector": "loopback-connector-mongodb",
   "url": "mongodb://localhost:27017/mydb" 
}

To work around this issue, you can create a post-deployment script for Heroku that replaces the url value with either process.env.MONGOLAB_URI or process.env.MONGOHQ_URL.

sed -i.bak s/MONGODB_URL/$MONGOHQ_URL/g datasources.json

In the meantime, it is suggested to log an inquiry at https://github.com/strongloop/loopback/issues.

Setting up StrongLoop LoopBack MongoDB datasource for successful deployment on Heroku

Answer №1

Answer №2

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