ECharts dataset object

BrendaHehe

Hi,

I'm trying to use the transform option in the dataset object, but have some issues with that.
It seems that if the dataset property isn't an object, but an array, which is required to use transform, the dataset.source is not filled by REI.

I haven't found the options object having the dataset as an array in the demo applications either.

This is the default:

"dataset": {
    "source": [
      "filled by app"
    ],
    "sourceHeader": false
  },
...

For any other configuration, the Echarts docs use it like this:

"dataset": [
    {
      "source": [
        "filled by app"
      ],
      "sourceHeader": false
    },
    {
      "transform": {
        ...
      }
    }
  ],
...

Even in the purest form, this doesn't work:

"dataset": [
    {
      "source": [
        "filled by app"
      ],
      "sourceHeader": false
    }
  ],
...

Could you help me with that?

gabriel

BrendaHehe
When working with the input for the options in the Builder, you need to follow the given structure:

r3 expects the dataset property to be set in this way to supply the data to it. Without reworking the chart feature in r3, you cannot use the dataset property any other way.

If you need full control over it, you can provide your own chart options object via frontend function. The call would then look something like this: app.set_field_chart({F3::Chart}, options)

The benefit is that you can use all echarts settings and functions - whatever the library supports. The downside is that r3 does not have any way to know where or how to supply values, so you have to fetch and then supply your own data. Fetching data can be done via backend function, while you would then process/parse the data and build your own options object in the frontend function.