[FIX] web: bar chart no crazy with 2 group by

In 3d2ca8104e4 some change were introduced to the graph view.

But part of it had no sense when displaying data over 2 group by.

eg. if the first level has 2 groups (2018, 2019) and each second level 2
    groups (Done,Cancelled), we could have:
     2018/Done: 0
     2018/Cancelled: 5
     2019/Done: 8
     2019/Cancelled: 9
    this gives us two main groups [2018: 5] / [2019: 17], the code
    remove the 2018 because [2018/Done] is 0 so we have something odd
    with columns not in order, and in stacked bar chart some part of
    a bar at the wrong offset

opw-1932517
closes #30529

1 files changed, 6 insertions, 4 deletions

diff --git a/addons/web/static/src/js/views/graph/graph_renderer.js b/addons/web/static/src/js/views/graph/graph_renderer.js
index 5ec89635dc8..2771159ab19 100644
--- a/addons/web/static/src/js/views/graph/graph_renderer.js
+++ b/addons/web/static/src/js/views/graph/graph_renderer.js
@@ -193,10 +193,12 @@ return AbstractRenderer.extend({
             }
         }
 
-        // For Bar chart View, we keep only groups where count > 0
-        data[0].values  = _.filter(data[0].values, function (elem, index) {
-            return self.state.data[index].count > 0;
-        });
+        // For one level Bar chart View, we keep only groups where count > 0
+        if (this.state.groupedBy.length <= 1) {
+            data[0].values  = _.filter(data[0].values, function (elem, index) {
+                return self.state.data[index].count > 0;
+            });
+        }
 
         var $svgContainer = $('<div/>', {class: 'o_graph_svg_container'});
         this.$el.append($svgContainer);