[FIX] web: graph: reload with correct fields

A traceback occurred when trying to reload a graph view with no
groupBy in the searchview, because the array of fields to read
given to the read_group RPC didn't contain the default groupBy
field (Error "Fields in 'groupby' must appear in the list of
fields to read"), e.g. in Sales > My Pipeline.

1 files changed, 2 insertions, 2 deletions

diff --git a/addons/web/static/src/js/views/graph/graph_model.js b/addons/web/static/src/js/views/graph/graph_model.js
index 8a7f5da6d5d..50e9f224697 100644
--- a/addons/web/static/src/js/views/graph/graph_model.js
+++ b/addons/web/static/src/js/views/graph/graph_model.js
@@ -114,13 +114,13 @@ return AbstractModel.extend({
      * @returns {Deferred}
      */
     _loadGraph: function () {
-        var fields = _.map(this.chart.groupedBy, function (groupBy) {
+        var groupedBy = this.chart.groupedBy.length ? this.chart.groupedBy : this.initialGroupBys;
+        var fields = _.map(groupedBy, function (groupBy) {
             return groupBy.split(':')[0];
         });
         if (this.chart.measure !== '__count__') {
             fields = fields.concat(this.chart.measure);
         }
-        var groupedBy = this.chart.groupedBy.length ? this.chart.groupedBy : this.initialGroupBys;
         return this._rpc({
                 model: this.modelName,
                 method: 'read_group',