Components with data provider issue double fetch request if a filter is set

When Grid or IronList have a ConfigurableFilterDataProvider and a filter is set before rendering the page, they issue a double request to the server.

For example:

@Route("list")
public class MyList extends Div implements BeforeEnterObserver {

    private ConfigurableFilterDataProvider<Foo, String> cfdp;

    public MyList(MyDataProvider dp) {
        IronList<Foo> list = new IronList<>();
        cfdp = dp.withConfigurableFilter();
        list.setDataProvider(cfdp);
        add(list);
    }

    @Override
    public void beforeEnter(BeforeEnterEvent event) {
        String filter = /* calculate from event */
        cfdp.setFilter(filter);
    }

}

this code will call the MyDataProvider::fetchFromBackend method twice, while if I comment out the line cfdp.setFilter(filter) it will fetch only once.

I’m experiencing this with Grid and IronList both, so I’m opening this here.

[bligny]

@heruan Did you finally find a workaround ? I’m currently facing the exact same issue - I’m using a regular Grid like @atistrcsn, , but in my case it’s systematic (I mean not limited to refresh).

[heruan]

@atistrcsn I didn’t solve it and I have to verify if it still affects my apps, but I remember it was IronList issuing two fetches with different offset/limit values. As soon as I have a chance to double check this I’ll let you know; can you create a repo with a minimal app reproducing this?