[FIX] point_of_sale: pricelist

- Create 2 pricelists A and B. Pricelist B relies on A.
- Make B available in the POS, but not A
- Start a POS session

The user faces a black screen without any information on the error.

We add a simple alert so that the user knowns the source of the problem.

opw-1874397

addons/point_of_sale/i18n/point_of_sale.pot

@@ -412,6 +412,13 @@ msgstr ""
 msgid "Amount total"
 msgstr ""
 
+#. module: point_of_sale
+#. openerp-web
+#: code:addons/point_of_sale/static/src/js/models.js:1244
+#, python-format
+msgid "An error occurred when loading product prices. Make sure all pricelists are available in the POS."
+msgstr ""
+
 #. module: point_of_sale
 #: model:ir.model.fields,help:point_of_sale.field_pos_config_name
 msgid "An internal identification of the point of sale."

addons/point_of_sale/static/src/js/models.js

@@ -1237,6 +1237,15 @@ exports.Product = Backbone.Model.extend({
         var self = this;
         var date = moment().startOf('day');
 
+        // In case of nested pricelists, it is necessary that all pricelists are made available in
+        // the POS. Display a basic alert to the user in this case.
+        if (pricelist === undefined) {
+            alert(_t(
+                'An error occurred when loading product prices. ' +
+                'Make sure all pricelists are available in the POS.'
+            ));
+        }
+
         var category_ids = [];
         var category = this.categ;
         while (category) {