Start working on sorting products by different columns.

templates/productList.html.twig

@@ -1,15 +1,16 @@
 {% extends "template.html.twig" %}
 
 {% block content %}
+    {{ app.request.get('order') }}
     <table class='table table-hover'>
         <thead>
         <tr>
             <th></th>
             <th></th>
-            <th>Name</th>
+            <th><a href="{{ path( app.request.get('_route') , {'order': app.request.get('order') is same as('-name')?'name':'-name'|default('-name')}) }}">Name</a></th>
             <th>Categories</th>
             <th></th>
-            <th>Price</th>
+            <th><a href="{{ path( app.request.get('_route') , {'order': app.request.get('order') is same as('-price')?'price':'-price'|default('-price')}) }}">Price</a></th>
             <th></th>
         </tr>
         </thead>