[FIX] pos_restaurant: order of kitchen ticket

When the kitchen ticket is printed, the order lines appear jumbled in
comparison to what is displayed on the PoS interface. This is an issue
since the kitchen cannot link main and side dishes for a given guest.
For example, the following order:
- Steak
- Fries
- Salmon
- Pasta
- Chicken
- Salad

On the kitchen ticket, this could appear as:
- Salmon
- Salad
- Chicken
- Steak
- Fries
- Pasta

The order actually depends on the product id.

The fix is to use the order line id instead of the product id in the
resume dictionary. Although a dictionary is an unordered collection,
most browsers keep the dictionary ordered. For example:
```
var a = {"18": "18", "1": "1", "21": "21", "14": "14"};
for(var i in a) { console.log(i) };
1
14
18
21
```

opw-680796

1 files changed, 2 insertions, 2 deletions

diff --git a/addons/pos_restaurant/static/src/js/multiprint.js b/addons/pos_restaurant/static/src/js/multiprint.js
index 19c76a30a4c..6ee225dc0c6 100644
--- a/addons/pos_restaurant/static/src/js/multiprint.js
+++ b/addons/pos_restaurant/static/src/js/multiprint.js
@@ -133,9 +133,9 @@ models.Orderline = models.Orderline.extend({
     },
     get_line_diff_hash: function(){
         if (this.get_note()) {
-            return this.get_product().id + '|' + this.get_note();
+            return this.id + '|' + this.get_note();
         } else {
-            return '' + this.get_product().id;
+            return '' + this.id;
         }
     },
 });