Issue with x axis stacking for a stacked bar chart

[cmodiano]

Hi,

I'm trying to build a stacked bar chart based on a time series x axis.
The chart doesn't seem to stack correctly on the x axis, I don't know if I missed something or it's a bug.
Any help will be much appreciate, here is a Fiddle to illustrate the problem.

https://jsfiddle.net/1kLyyjfp/

Thanks

[simonbrunel]

@cmodiano I'm not sure what are your expectations in this case, maybe #4994 (fiddle) fixed it. But your issue might also be the way you setup your data, I'm not sure it works well to define data like [{x, y}] with the stack feature. You could try to use labels + data[y] instead:

data: {
  labels: ['2017-12-22 08:59', '2017-12-22 09:00'],
  datasets: [{
    data: [2, 18]
  }, {
    data: [0, 2]
  }, {
    data: [0, 4]
  }, 
  //...
}   

[cmodiano]

@simonbrunel You add a 0 value for the y when the timestamp data does not exist, is it mandatory? If yes this will mean I have to alter the data retrieved from the database before generating the chart. Is it possible to make Chartjs auto add the 0 values for missing timestamps?
I'm not sure the issue you're linking to is related to mine.

Thanks

[simonbrunel]

I guess it should work the way you set your data, but I'm not sure the actual code can handle it, that's why I suggest the other format. I think it would help if you provide a picture of the result you are expecting.

[cmodiano]

I tried and whatever format is used it is necessary that each serie has a value for each timestamp.
It would be nice if a 0 value could be added automatically if none is provided. I think it must be a really common use case.

[AimForNaN]

Came across this issue today.

Here is what I get: https://jsfiddle.net/kbn1L9w1/
Here is what I expect: https://jsfiddle.net/5a40pn0j/

The only difference with the two scripts is that I manually fill in data so that both data sets match the same length, though I was expecting the script to do that work for me. Indeed, the green bar should not be extending into a category that it is not part of.

[benmccann]

It looks like this PR might be for the same issue: #5298