sunburst chart doesn't render when key reduced to multiple values

[mukherjeea]

I am using dc.js v3.0.3

Sunburst chart works as expected when a key is reduced to a single value.
However when a key is reduced to multiple values and valueAccessor is used to specify one of them I see the following error.

this shouldn't be the case as all the values are 'defined'. Am I missing something here?
Both the cases are illustrated in the following jsfiddle
https://jsfiddle.net/brL1x26g/

[kum-deepak]

I think I understand the underlying reason. The Sunburst chart creates additional nodes (as parents) to create the hierarchy. These nodes are not same structure as the leaf level nodes.

The exception is generated for the first parent node that it encounters.

I have updated the fiddle with a possible solution:

https://jsfiddle.net/brL1x26g/1/

    .valueAccessor(function(p) {
      if(p.path) {
      	return p.value;
      }
      return p.value._nd.exceptionSum;
    })

Can you please validate the resulting chart is correct, if that is so, I will make the corresponding change in the sunburst code.

In all likelihood similar issue might exist while using keyAccessor as well.

[mukherjeea]

Thanks @kum-deepak. This does look correct.

[kum-deepak]

@mukherjeea please continue with the workaround. The underlying code is proving difficult to fix. I will update when I have a clean solution implemented.

[gordonwoodhull]

@kum-deepak, this problem of "synthetic nodes" is similar to the Others item in capped charts. There we use a special accessor which wraps the original accessor and does the same thing you show (but with a different field).

It just means the chart must consistently use the wrapped accessor instead of the original. I'm not sure if it solves all problems, but I think it does pretty well.

[kum-deepak]

Thanks for your timely advice @gordonwoodhull! I have attempted (see #1444), will need to work in tidying the example and figure out test cases.

[gordonwoodhull]

Fixed by #1444