merge db_options into default options

lib/db.js

@@ -5,6 +5,7 @@ var timestamps = require('mongoose-time')
 var fs = require('fs')
 var merge = require('mongoose-merge-plugin')
 var mongoUri = require('mongodb-uri')
+var _ = require('lodash')
 
 function load_models (model_path) {
   fs.readdirSync(model_path).forEach(function (file) {
@@ -39,14 +40,7 @@ module.exports = {
       throw new Error('Can\'t connect to Database')
     }
     uri = uri || mongoUri.formatMongoose({username: username, password: password, hosts: [{host: host, port: port}], database: database})
-    if (options) {
-      try {
-        options = JSON.parse(options)
-      } catch (e) {
-        options = null
-      }
-    }
-    options = options || {
+    var default_options = {
       server: {
         socketOptions: {
           keepAlive: 1,
@@ -60,7 +54,18 @@ module.exports = {
         }
       }
     }
-    console.log('options', JSON.stringify(options))
+    if (options) {
+      try {
+        options = JSON.parse(options)
+        options = _.merge(default_options, options)
+      } catch (e) {
+        console.warning('cant resolve db options:', e)
+        options = default_options
+      }
+    } else {
+      options = default_options
+    }
+    console.log('db_options', JSON.stringify(options))
     // CONNECTION EVENTS
     mongoose.connection.on('connected', function () {
       console.log('Database connected to: ' + uri)