Allowing a collection to be passed into a model via the options.

backbone.js

@@ -112,6 +112,7 @@
     this.cid = _.uniqueId('c');
     this.set(attributes || {}, {silent : true});
     this._previousAttributes = _.clone(this.attributes);
+    if (options && options.collection) this.collection = options.collection;
     if (this.initialize) this.initialize(attributes, options);
   };
 

test/model.js

@@ -34,8 +34,9 @@ $(document).ready(function() {
         this.one = 1;
       }
     });
-    var model = new Model;
+    var model = new Model({}, {collection: collection});
     equals(model.one, 1);
+    equals(model.collection, collection);
   });
 
   test("Model: initialize with attributes and options", function() {