From ab0a207a591e11c1c8c47cd7fdfd2037f73bec03 Mon Sep 17 00:00:00 2001
From: Pierre Masereel <pim@odoo.com>
Date: Mon, 26 Aug 2019 13:11:23 +0000
Subject: [PATCH] [FIX] point_of_sale: force load discount product

When you set up a discount product on your pos config and also some
available categories, it is possible that the discount product is not
loaded in the point of sale, which lead to an error.

Now we are forcing the loading of the discount product to allow using it
even if it is not in the allowed categories, as we don't want to create
a discount product for each category if we want to use both features.

TASK-ID: 2057436
---
 addons/pos_discount/static/src/js/discount.js | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/addons/pos_discount/static/src/js/discount.js b/addons/pos_discount/static/src/js/discount.js
index fc41e55bc05..991e738b3e1 100644
--- a/addons/pos_discount/static/src/js/discount.js
+++ b/addons/pos_discount/static/src/js/discount.js
@@ -3,9 +3,27 @@ odoo.define('pos_discount.pos_discount', function (require) {
 
 var core = require('web.core');
 var screens = require('point_of_sale.screens');
+var models = require('point_of_sale.models');
 
 var _t = core._t;
 
+var existing_models = models.PosModel.prototype.models;
+var product_index = _.findIndex(existing_models, function (model) {
+    return model.model === "product.product";
+});
+var product_model = existing_models[product_index];
+
+
+models.load_models([{
+  model:  product_model.model,
+  fields: product_model.fields,
+  order:  product_model.order,
+  domain: function(self) {return [['id', '=', self.config.discount_product_id[0]]];},
+  context: product_model.context,
+  loaded: product_model.loaded,
+}]);
+
+
 var DiscountButton = screens.ActionButtonWidget.extend({
     template: 'DiscountButton',
     button_click: function(){