Added a new associate method, to associate a row in the cart with a model, so you can access the model from the CartRowCollection

src/Gloudemans/Shoppingcart/Cart.php

@@ -25,6 +25,20 @@ class Cart {
 	 */
 	protected $instance;
 
+	/**
+	 * The Eloquent model a cart is associated with
+	 *
+	 * @var string
+	 */
+	protected $associatedModel;
+
+	/**
+	 * An optional namespace for the associated model
+	 *
+	 * @var string
+	 */
+	protected $associatedModelNamespace;
+
 	/**
 	 * Constructor
 	 *
@@ -55,6 +69,24 @@ class Cart {
 		return $this;
 	}
 
+	/**
+	 * Set the associated model
+	 *
+	 * @param  string    $modelName        The name of the model
+	 * @param  string    $modelNamespace   The namespace of the model
+	 * @return void
+	 */
+	public function associate($modelName, $modelNamespace = null)
+	{
+		$this->associatedModel = $modelName;
+		$this->associatedModelNamespace = $modelNamespace;
+
+		if( ! class_exists($modelNamespace . '\\' . $modelName)) throw new Exceptions\ShoppingcartUnknownModelException;
+
+		// Return self so the method is chainable
+		return $this;
+	}
+
 	/**
 	 * Add a row to the cart
 	 *
@@ -411,7 +443,7 @@ class Cart {
 			'price' => $price,
 			'options' => new CartRowOptionsCollection($options),
 			'subtotal' => $qty * $price
-		));
+		), $this->associatedModel, $this->associatedModelNamespace);
 
 		$cart->put($rowId, $newRow);
 
@@ -428,7 +460,6 @@ class Cart {
 	protected function updateQty($rowId, $qty)
 	{
 		if($qty <= 0)
-		if($qty == 0)
 		{
 			return $this->remove($rowId);
 		}

src/Gloudemans/Shoppingcart/CartRowCollection.php

@@ -4,9 +4,33 @@ use Illuminate\Support\Collection;
 
 class CartRowCollection extends Collection {
 
-	public function __construct($items)
+	/**
+	 * The Eloquent model a cart is associated with
+	 *
+	 * @var string
+	 */
+	protected $associatedModel;
+
+	/**
+	 * An optional namespace for the associated model
+	 *
+	 * @var string
+	 */
+	protected $associatedModelNamespace;
+
+	/**
+	 * Constructor for the CartRowCollection
+	 *
+	 * @param array    $items
+	 * @param string   $associatedModel
+	 * @param string   $associatedModelNamespace
+	 */
+	public function __construct($items, $associatedModel, $associatedModelNamespace)
 	{
 		parent::__construct($items);
+
+		$this->associatedModel = $associatedModel;
+		$this->associatedModelNamespace = $associatedModelNamespace;
 	}
 
 	public function __get($arg)
@@ -16,10 +40,18 @@ class CartRowCollection extends Collection {
 			return $this->get($arg);
 		}
 
-		return NULL;
+		if($arg == strtolower($this->associatedModel))
+		{
+			$modelInstance = $this->associatedModelNamespace ? $this->associatedModelNamespace . '\\' .$this->associatedModel : $this->associatedModel;
+			$model = new $modelInstance;
+
+			return $model->find($this->id);
+		}
+
+		return null;
 	}
 
-	public function search(Array $search)
+	public function search(array $search)
 	{
 		foreach($search as $key => $value)
 		{

src/Gloudemans/Shoppingcart/Exceptions/ShoppingcartUnknownModelException.php

@@ -0,0 +1,3 @@
+<?php namespace Gloudemans\Shoppingcart\Exceptions;
+
+class ShoppingcartUnknownModelException extends \Exception {}