Bugreport - ui.datatable.parse doesn't work as expected when pos equals to 0

Webix JS
1

Documentation states that “If you want to parse data in addition to the existing dataset, specify position of parsing, namely the index from which you insert new data:”

$$(“datatable”).parse({
pos: indexToStart,
data:dataset
});

If indexToStart equals to any number greater then zero and less then $$(“datatable”).count() - everything works as expected, old rows get updated according to parsed data. But if indexToStart = 0, then a new row is added, instead of an old one being updated. I suspect that there is a line like

if(params.pos)
//update records;
else
//insertRecods;

and it fails in situations where 0 is cast to false.

2

can’t delete comment, so just ignore this one

3

I’m running into the same issue. I’ve trying to start parsing at index 0, but it’s not working. Having you figured this out?

4

The point is that thepos inparse() has no possibility to add the data to the 0-position. It’s not a bug, but a feature due to the data processing.

If you need to add a single entry to the top, please use theadd method:

datatable.add({ id:'some', value:'some' }, 0)

The same method can be used for adding an array of data, but with one important thing: as theadd triggers the rendering each added item, you need to use the (un)blockEvent API to avoid multiple repainting:

http://webix.com/snippet/6e5f0d2e