Don't apply defaults when fields are specified

lib/model.js

@@ -53,7 +53,7 @@ function ModelBaseClass(data, options) {
 ModelBaseClass.prototype._initProperties = function (data, options) {
   var self = this;
   var ctor = this.constructor;
-
+  
   if(data instanceof ctor) {
     // Convert the data to be plain object to avoid pollutions
     data = data.toObject(false);
@@ -73,10 +73,6 @@ ModelBaseClass.prototype._initProperties = function (data, options) {
     strict = ctor.definition.settings.strict;
   }
   
-  if (options.persisted !== undefined) {
-    this.__persisted = options.persisted === true;
-  }
-  
   if (ctor.hideInternalProperties) {
     // Object.defineProperty() is expensive. We only try to make the internal
     // properties hidden (non-enumerable) if the model class has the
@@ -110,6 +106,13 @@ ModelBaseClass.prototype._initProperties = function (data, options) {
         enumerable: false,
         configurable: true,
         value: strict
+      },
+
+      __persisted: {
+        writable: true,
+        enumerable: false,
+        configurable: true,
+        value: false
       }
     });
   } else {
@@ -118,12 +121,23 @@ ModelBaseClass.prototype._initProperties = function (data, options) {
     this.__dataSource = options.dataSource;
     this.__strict = strict;
   }
+  
+  if (options.persisted !== undefined) {
+    this.__persisted = options.persisted === true;
+  }
 
   if (data.__cachedRelations) {
     this.__cachedRelations = data.__cachedRelations;
   }
 
   var keys = Object.keys(data);
+  
+  if (Array.isArray(options.fields)) {
+    keys = keys.filter(function(k) {
+      return (options.fields.indexOf(k) != -1);
+    });
+  }
+  
   var size = keys.length;
   var p, propVal;
   for (var k = 0; k < size; k++) {
@@ -169,6 +183,13 @@ ModelBaseClass.prototype._initProperties = function (data, options) {
   }
   
   keys = Object.keys(properties);
+  
+  if (Array.isArray(options.fields)) {
+    keys = keys.filter(function(k) {
+      return (options.fields.indexOf(k) != -1);
+    });
+  }
+  
   size = keys.length;
 
   for (k = 0; k < size; k++) {

test/defaults.test.js

@@ -35,4 +35,18 @@ describe('defaults', function () {
       done();
     });
   });
+  
+  it('should ignore defaults with limited fields', function (done) {
+    Server.create({ host: 'localhost', port: 8080 }, function(err, s) {
+      should.not.exist(err);
+      s.port.should.equal(8080);
+      Server.find({ fields: ['host'] }, function (err, servers) {
+        servers[0].host.should.equal('localhost');
+        servers[0].should.have.property('host');
+        servers[0].should.not.have.property('port');
+        done();
+      });
+    });
+  });
+  
 });