[FIX] web: properly initialize non empty x2many in default_get

When the ´default_get´ returns default values for a x2many field, it needs
to be set as changed fields in this x2many field. Previously, it was wrongly
assumed that these changes were non existant.

1 files changed, 1 insertions, 0 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 47ce8ad3780..82351645c26 100644
--- a/addons/web/static/src/js/views/basic/basic_model.js
+++ b/addons/web/static/src/js/views/basic/basic_model.js
@@ -2065,6 +2065,7 @@ var BasicModel = AbstractModel.extend({
                                         fields: fields,
                                         viewType: viewType,
                                     });
+                                    x2manyList._changes = x2manyList._changes || [];
                                     x2manyList._changes.push(r.id);
                                     r._changes = value[2];