[IMP] web: many2one as measure in graph & pivot only when desirable

With this commit, the fields many2one are not always measures in pivot
and graph views. By default, they are *not* measures.

In order to have them as measures, we should pass `additionalMeasures`
as a param to any of the views, which contains a list of fields to consider
as measures.

example:

    Suppose a model with the following fields:

        - `product_id` (many2one)
        - `categ_id` (many2one)
        - `sold` (float)

    By default, only the field `sold` is a measure
    in a graph or pivot view.

    In order to pass `product_id` as a measure of
    a graph view, you should instantiate this view
    as follow:

``
    var viewInfo = /* ... */;
    var params = {
        additionalMeasures = ['product_id'],
    };
    var graph = new GraphView(viewInfo, params);
``

An exception to the rule above is when the many2one field is of type `measure`
in the arch: this field is set as the default measure of the view, therefore
it is implicitly added as an additional measure.

1 files changed, 8 insertions, 4 deletions

diff --git a/addons/web/static/src/js/views/graph/graph_view.js b/addons/web/static/src/js/views/graph/graph_view.js
index 8cfe2dc0272..54ff6642b15 100644
--- a/addons/web/static/src/js/views/graph/graph_view.js
+++ b/addons/web/static/src/js/views/graph/graph_view.js
@@ -36,12 +36,15 @@ var GraphView = AbstractView.extend({
     /**
      * @override
      */
-    init: function () {
+    init: function (viewInfo, params) {
         this._super.apply(this, arguments);
 
+        var self = this;
         var measure;
         var groupBys = [];
+        var measures = {__count__: {string: _t("Count"), type: "integer"}};
         this.fields.__count__ = {string: _t("Count"), type: "integer"};
+
         this.arch.children.forEach(function (field) {
             var name = field.attrs.name;
             if (field.attrs.interval) {
@@ -49,16 +52,17 @@ var GraphView = AbstractView.extend({
             }
             if (field.attrs.type === 'measure') {
                 measure = name;
+                measures[name] = self.fields[name];
             } else {
                 groupBys.push(name);
             }
         });
 
-        var measures = {__count__: {string: _t("Count"), type: "integer"}};
         _.each(this.fields, function (field, name) {
             if (name !== 'id' && field.store === true) {
-                if (field.type === 'integer' || field.type === 'float' || field.type === 'monetary' || field.type === 'many2one') {
-                    measures[name] = field;
+                if (_.contains(['integer', 'float', 'monetary'], field.type) ||
+                    _.contains(params.additionalMeasures, name)) {
+                        measures[name] = field;
                 }
             }
         });