provide warning if columns arity does not match Fixes jupyter#83

(c) Copyright IBM Corp. 2015
peller · Nov 6, 2015 · 38a44a8 · 38a44a8
1 parent 561d9ea
commit 38a44a8
Showing 1 changed file with 12 additions and 1 deletion.
diff --git a/elements/urth-viz-chart/urth-viz-chart.html b/elements/urth-viz-chart/urth-viz-chart.html
@@ -175,7 +175,8 @@
         },
 
         behaviors: [
-            Polymer.IronResizableBehavior
+            Polymer.IronResizableBehavior,
+            Urth.JupyterWidgetBehavior
         ],
 
         listeners: {
@@ -205,6 +206,16 @@
             primary = primary || this.primary;
             secondary = secondary || this.secondary;
 
+            if (columns && datarows[0] && columns.length && datarows[0].length) {
+                if (columns.length != datarows[0].length) {
+                    this.displayErrorMessage("Warning: arity of columns does not match data");
+                } else {
+                    require(['d3'], function(d3) {
+                        d3.select(this).select('.urth-widget-error').remove();
+                    }.bind(this));
+                }
+            }
+
             var columnSettings = this.columnSettings;
             var values = (datarows[0] || []).map(function (rows, i) {
                 var t = function (d, i) {