diff --git a/index.js b/index.js
index 8f6c6d17..a1e5420e 100644
--- a/index.js
+++ b/index.js
@@ -4,12 +4,6 @@ exports.ModelBaseClass = require('./lib/model.js');
 exports.GeoPoint = require('./lib/geo.js').GeoPoint;
 exports.ValidationError = require('./lib/validations.js').ValidationError;
 
-var dataSources = exports.dataSources = {};
-
-exports.registerDataSource = function(ds) {
-  dataSources[ds.name] = ds;
-};
-
 exports.__defineGetter__('version', function () {
     return require('./package.json').version;
 });
diff --git a/lib/relation-definition.js b/lib/relation-definition.js
index 818b5610..3a5b7371 100644
--- a/lib/relation-definition.js
+++ b/lib/relation-definition.js
@@ -4,7 +4,6 @@
 var assert = require('assert');
 var util = require('util');
 var i8n = require('inflection');
-var jdb = require('../');
 var defineScope = require('./scope.js').defineScope;
 var mergeQuery = require('./scope.js').mergeQuery;
 var ModelBaseClass = require('./model.js');
@@ -467,7 +466,7 @@ function findBelongsTo(modelFrom, modelTo, keyTo) {
  * @param {String} modelName The model name
  * @returns {*} The matching model class
  */
-function lookupModel(models, modelName, internal) {
+function lookupModel(models, modelName) {
   if(models[modelName]) {
     return models[modelName];
   }
@@ -477,15 +476,6 @@ function lookupModel(models, modelName, internal) {
       return models[name];
     }
   }
-  if (internal) return;
-  
-  var keys = Object.keys(jdb.dataSources);
-  for (var k = 0; k < keys.length; k++) {
-    var ds = jdb.dataSources[keys[k]];
-    var models = ds.modelBuilder.models;
-    var model = lookupModel(models, modelName, true);
-    if (model) return model;
-  }
 }
 
 function lookupModelTo(modelFrom, modelTo, params, singularize) {
diff --git a/test/relations.test.js b/test/relations.test.js
index 77619238..eb042903 100644
--- a/test/relations.test.js
+++ b/test/relations.test.js
@@ -10,7 +10,7 @@ var Person, Address;
 var Link;
 
 var getTransientSchema = function(settings) {
-    return new Schema('transient', settings);
+    return new Schema('transient', settings, db.modelBuilder);
 };
 
 describe('relations', function () {
@@ -2423,10 +2423,6 @@ describe('relations', function () {
       db = getSchema();
       tmp = getTransientSchema();
       
-      // register here, so transient models
-      // can lookup related models (polymorphic)
-      jdb.registerDataSource(db);
-      
       Book = db.define('Book', {name: String});
       Author = db.define('Author', {name: String});
       Reader = db.define('Reader', {name: String});
diff --git a/test/transient.test.js b/test/transient.test.js
index 82b063cb..89c1dd30 100644
--- a/test/transient.test.js
+++ b/test/transient.test.js
@@ -5,12 +5,12 @@ var assert = require('assert');
 var async = require('async');
 var should = require('./init.js');
 
+var db, TransientModel, Person, Widget, Item;
+
 var getTransientSchema = function(settings) {
     return new Schema('transient', settings);
 };
 
-var db, TransientModel, Person, Widget, Item;
-
 describe('Transient connector', function () {
   
   before(function () {