[FIX] web: fix one2many default get

The one2many default get code used to meddle with basic_model's res_ids
manually, which ended up desynchronizing the data and res_ids fields
of the list representation of the one2many values.

This commit solves the issue by using the proper mechanisms of the
basic_model, that is creating a proper datapoint for those ids.

Steps to reproduce the original issue:
- Install sale_mamangement, mrp and purchase
- Create a product
- In the Inventory tab, in Routes, uncheck Buy
- Check and then uncheck back any other route than Buy
- Get a traceback because we are looking for a record with a given
  res_id in the list data but since they are desynchronized, data
  is empty at that point even though res_ids is not.

1 files changed, 12 insertions, 2 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 7810a1195f0..9e7fb8b78ef 100644
--- a/addons/web/static/src/js/views/basic/basic_model.js
+++ b/addons/web/static/src/js/views/basic/basic_model.js
@@ -3182,8 +3182,18 @@ var BasicModel = AbstractModel.extend({
                             }
                             if (value[0] === 6) {
                                 // REPLACE_WITH
-                                x2manyList.res_ids = value[2];
-                                x2manyList.count = x2manyList.res_ids.length;
+                                _.each(value[2], function (res_id) {
+                                    r = self._makeDataPoint({
+                                        modelName: x2manyList.model,
+                                        context: x2manyList.context,
+                                        fieldsInfo: fieldsInfo,
+                                        fields: fields,
+                                        parentID: x2manyList.id,
+                                        res_id: res_id,
+                                        viewType: viewType,
+                                    });
+                                    x2manyList._changes.push({operation: 'ADD', id: r.id});
+                                });
                                 var def = self._readUngroupedList(x2manyList).then(function () {
                                     return $.when(
                                         self._fetchX2ManysBatched(x2manyList),