[MERGE] forward port of branch 8.0 up to c9fce1a

3 files changed, 14 insertions, 6 deletions

diff --git a/addons/web/static/src/js/data.js b/addons/web/static/src/js/data.js
index c00cedc620b..b15780d252a 100644
--- a/addons/web/static/src/js/data.js
+++ b/addons/web/static/src/js/data.js
@@ -1047,8 +1047,11 @@ instance.web.BufferedDataSet = instance.web.DataSetStatic.extend({
         return this._super(id, signal);
     },
     alter_ids: function(n_ids) {
+        var dirty = !_.isEqual(this.ids, n_ids);
         this._super(n_ids);
-        this.trigger("dataset_changed", n_ids);
+        if(dirty) {
+            this.trigger("dataset_changed", n_ids);
+        }
     },
 });
 instance.web.BufferedDataSet.virtual_id_regex = /^one2many_v_id_.*$/;
diff --git a/addons/web/static/src/js/formats.js b/addons/web/static/src/js/formats.js
index b716f0f0ef3..3461134d725 100644
--- a/addons/web/static/src/js/formats.js
+++ b/addons/web/static/src/js/formats.js
@@ -312,7 +312,16 @@ instance.web.round_precision = function(value, precision){
     var epsilon_magnitude = Math.log(Math.abs(normalized_value))/Math.log(2);
     var epsilon = Math.pow(2, epsilon_magnitude - 53);
     normalized_value += normalized_value >= 0 ? epsilon : -epsilon;
-    var rounded_value = Math.round(normalized_value);
+
+    /**
+     * Javascript performs strictly the round half up method, which is asymmetric. However, in
+     * Python, the method is symmetric. For example:
+     * - In JS, Math.round(-0.5) is equal to -0.
+     * - In Python, round(-0.5) is equal to -1.
+     * We want to keep the Python behavior for consistency. 
+     */
+    var sign = normalized_value < 0 ? -1.0 : 1.0;
+    var rounded_value = sign * Math.round(Math.abs(normalized_value));
     return rounded_value * precision;
 };
 
diff --git a/addons/web/static/src/js/view_form.js b/addons/web/static/src/js/view_form.js
index 929db311e30..04f6511a1de 100644
--- a/addons/web/static/src/js/view_form.js
+++ b/addons/web/static/src/js/view_form.js
@@ -4413,10 +4413,6 @@ instance.web.form.One2ManyListView = instance.web.ListView.extend({
         }));
         this.on('edit:after', this, this.proxy('_after_edit'));
         this.on('save:before cancel:before', this, this.proxy('_before_unedit'));
-
-        this.records
-            .bind('add', this.proxy("changed_records"))
-            .bind('remove', this.proxy("changed_records"));
         this.on('save:after', this, this.proxy("changed_records"));
     },
     start: function () {