[FIX] web: prevent add a line from crashing when orderedResIDs is not set

This fixes the following bug:

Creating an Invoice, clicking on Validate (with no invoice line), and then trying to add a product.

Before this fix, this would throw an error message.

Now it works.

1 files changed, 1 insertions, 1 deletions

diff --git a/addons/web/static/src/js/views/basic/basic_model.js b/addons/web/static/src/js/views/basic/basic_model.js
index 822302630fa..d8ebddc101c 100644
--- a/addons/web/static/src/js/views/basic/basic_model.js
+++ b/addons/web/static/src/js/views/basic/basic_model.js
@@ -1832,7 +1832,7 @@ var BasicModel = AbstractModel.extend({
             case 'CREATE':
                 var options = {position: command.position};
                 def = this._addX2ManyDefaultRecord(list, options).then(function (id) {
-                    if (command.position === 'bottom' && list.orderedResIDs.length >= list.limit) {
+                    if (command.position === 'bottom' && list.orderedResIDs && list.orderedResIDs.length >= list.limit) {
                         list.tempLimitIncrement = (list.tempLimitIncrement || 0) + 1;
                         list.limit += 1;
                     }