Merge pull request '2499 - Allow zero quantity' (#411) from 2499-sale_quantity_zero into dev

Reviewed-on: #411
Reviewed-by: Bernat Exposito <bernat@verdnatura.es>

modules/entry/front/basic-data/index.html

@@ -1,11 +1,9 @@
+<mg-ajax path="Entries/{{patch.params.id}}" options="vnPatch"></mg-ajax>
 <vn-watcher
     vn-id="watcher"
-    url="Entries"
-    id-field="id"
     data="$ctrl.entry"
-    params="$ctrl.entry"
-    save="patch"
-    form="form">
+    form="form"
+    save="patch">
 </vn-watcher>
 <form name="form" ng-submit="watcher.submit()" class="vn-w-md">
     <vn-card class="vn-pa-lg">

modules/ticket/front/sale/index.js

@@ -386,7 +386,7 @@ class Controller extends Section {
      * Updates the sale quantity for existing instance
      */
     changeQuantity(sale) {
-        if (!sale.itemFk || !sale.quantity) return;
+        if (!sale.itemFk || sale.quantity == null) return;
 
         if (!sale.id)
             return this.addSale(sale);