#350: Creating a batch via hasMany relation is failing. Added handling of array argument.

lib/relation-definition.js

@@ -1540,14 +1540,26 @@ HasMany.prototype.create = function (targetModelData, cb) {
     targetModelData = {};
   }
   targetModelData = targetModelData || {};
-  targetModelData[fk] = modelInstance[pk];
 
-  this.definition.applyProperties(modelInstance, targetModelData);
+  var fkAndProps = function(item) {
+    item[fk] = modelInstance[pk];
+    self.definition.applyProperties(modelInstance, item);
+  };
+
+  var apply = function(data, fn) {
+    if (Array.isArray(data)) {
+      data.forEach(fn);
+    } else {
+      fn(data);
+    }
+  };
+
+  apply(targetModelData, fkAndProps);
 
   modelTo.create(targetModelData, function(err, targetModel) {
     if(!err) {
       //Refresh the cache
-      self.addToCache(targetModel);
+      apply(targetModel, self.addToCache.bind(self));
       cb && cb(err, targetModel);
     } else {
       cb && cb(err);

test/relations.test.js

@@ -87,6 +87,25 @@ describe('relations', function () {
         });
       });
 
+      it('should create a batch of records on scope', function (done) {
+        var chapters = [
+          {name: 'a'},
+          {name: 'z'},
+          {name: 'c'}
+        ];
+        Book.create(function (err, book) {
+          book.chapters.create(chapters, function (err, chs) {
+            should.not.exist(err);
+            should.exist(chs);
+            chs.should.have.lengthOf(chapters.length);
+            chs.forEach(function(c) {
+              c.bookId.should.equal(book.id);
+            });
+            done();
+          });
+        });
+      });
+
       it('should fetch all scoped instances', function (done) {
         Book.create(function (err, book) {
           book.chapters.create({name: 'a'}, function () {