[FIX] fixes a crash happening when in dashboards, the graph view was trying to...

[FIX] fixes a crash happening when in dashboards, the graph view was trying to access undefined attributes (addon web_graph)

bzr revid: ged@openerp.com-20140123113450-ec4fubf1urkdutw7

addons/web_graph/static/src/js/graph_view.js

@@ -173,7 +173,7 @@ instance.web_graph.GraphView = instance.web.View.extend({
             context[category] = groupby.field;
             var value;
             if (category === 'group_by' && groupby.type !== 'date' && groupby.type !== 'datetime') {
-                value = groupby.filter;
+                value = groupby.filter || {attrs: {domain: [], context: context}};
             } else {
                 value = {attrs: {domain: [], context: context}};
             }

addons/web_graph/static/src/js/graph_widget.js

@@ -43,6 +43,7 @@ openerp.web_graph.Graph = openerp.web.Widget.extend({
 
         return this.model.call('fields_get', []).then(function (f) {
             self.fields = f;
+            self.fields.__count = {field:'__count', type: 'integer', string:'Quantity'};
             self.measure_list = self.get_measures();
             self.add_measures_to_options();
             self.pivot_options.row_groupby = self.create_field_values(self.pivot_options.row_groupby || []);
@@ -87,7 +88,7 @@ openerp.web_graph.Graph = openerp.web.Widget.extend({
 
     // Extracts the integer/float fields which are not 'id'
     get_measures: function() {
-        var measures = [{field:'__count', type: 'integer', string:'Quantity'}];
+        var measures = [];
         _.each(this.fields, function (f, id) {
             if (((f.type === 'integer') || (f.type === 'float')) && (id !== 'id')) {
                 measures.push({field:id, type: f.type, string: f.string});