Ng2-charts: Can't update labels on a Pie chart

[king612]

I have a Angular 5 page that is trying to use your package to draw a simple Pie chart. The data is all set after rendering, and the data seems to update just fine, but when I try to generate and set the labels array, every label shows up as undefined. I have debugged to check the array is getting loaded correctly, but it seems like with labels on Pie / Donut charts, only a statically set array of labels at declaration works. Changing the label array (even creating a new array and resetting the class member) fails to render any labels on the standard mouseover / hover tooltip.

Any suggestions appreciated.

[david-j-lee]

I noticed this is an issue on #774. When can we expect a fix?

[itabo]

Any news?. I have the same problem.

[king612]

The post below on that page worked for me. It's a work around, but it
worked.

John K.

• mertyildiran https://github.com/mertyildiran * commented on Apr 30, 2017
  https://github.com/valor-software/ng2-charts/issues/774#issuecomment-298263293

On Wed, Jan 31, 2018 at 12:36 PM, Nacho [e-mail] wrote:

Any news?. I have the same problem.

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[paviad]

Closed by ef5d2f4

[maksof-kashif]

try this i have try it with bar chat but process is same just customize according to your code.

[datasets]="ChartData"
//...other stuff >

and in the component I have a function which update the chart with new data, and then I clone the datasets and re-assign it

drawChart(){
this.ChartData=[{data: this.dataX, label: 'X'}]; // this.dataX has new values from some place in my code
//nothing happened with my chart yet, until I add this lines:
let clone = JSON.parse(JSON.stringify(this.ChartData));
this.ChartData=clone;
//other stuff like labels etc.
}