burndown chart broken with recent gviz libraries

[anonymous]

The burndown chart was not displaying and I found the following javascript error:

"Bars series with value domain axis is not supported"

It appears the google vis library has changed, details here:

​http://code.google.com/p/google-visualization-api-issues/issues/detail?id=795

I was able to resolve it by converting the dates to strings.

$ diff -u sumstatsplugin/0.12/sumstats/web_ui.py.orig sumstatsplugin/0.12/sumstats/web_ui.py
--- sumstatsplugin/0.12/sumstats/web_ui.py.orig 2012-01-25 12:49:58.000000000 -0500
+++ sumstatsplugin/0.12/sumstats/web_ui.py      2012-01-25 12:46:46.000000000 -0500
@@ -345,12 +345,12 @@
             else:
                 total,done,todo = self._get_burndown_day(milestone, day)
             # add to rows
-            rows.append({'day':day, 'total':total, 'todo':todo, 'done':done})
+            rows.append({'day':day.date(), 'total':total, 'todo':todo, 'done':done})
             day += timedelta(days=1)

         # package the data for the google visualization query response
         import gviz_api
-        schema = {"day": ("date", "Day"),
+        schema = {"day": ("string", "Day"),
                   "total": ("number", "Total"),
                   "todo": ("number", "To Do"),
                   "done": ("number", "Done")}

[Rob Guttman]

Yes, a bit frustrating that Google doesn't let you stick with prior versions! But this is actually a problem on the chart rendering/visualization side, not on this data provider side.

Another interim workaround for the visualization side is to use their newly documented strictFirstColumnType option. If using the VisualizationPlugin, for example:

[viz]
options = strictFirstColumnType:false

This should make the chart work with still using a continuous value for the (date) x-axis. But this is just an interim solution until I get around to a more robust, permanent solution for the VisualizationPlugin.

[Rob Guttman]

As there is a workaround for this issue, I'm going to close as wontfix. If/when Google removes this deprecated functionality, I'll address at that time.

[Rob Guttman]

Actually, this ticket should have been against the VisualizationPlugin, so marking as invalid for the SumStatsPlugin.