Vaadin 8 Grid filtering with BackEndDataProvider

Vaadin 6 / 7 / 8
1

I was created Service class which extends “BackEndDataProvider”,
Get “ConfigurableFilterDataProvider” from service.
After configurableFilterDataProvider.setFilter(…) filter not applied,
“.fetch” method from BackEndDataProvider not firing.

2

Today’s not elegant solution is create
“.setFilter”
 method in service class and apply filter by calling
“.setFilter” and after
grid.setDataProvider(…)
 to reload data in grid from service.

See source code here:
https://github.com/zesetup/vaadin8grid

3

i rewrited with “withConfigurableFilter” and now question is - why needed to call “grid.getDataCommunicator().reset()” to reload data in grid from Data Provider.


https://github.com/zesetup/vaadin8grid

4

Perhaps you should check this example:
https://github.com/vaadin/framework8-demo/blob/master/spring-demo/spring-demo-ui/src/main/java/com/vaadin/framework8/samples/crud/ProductDataProviderImpl.java

He extends from AbstractBackEndDataProvider and he doesn’t use grid.getDataCommunicator().reset() (only to reset the grid).

I didn’t overwrite a backendprovider (I use CallbackDataProvider which call my service) so i don’t know exactly why you need getDataCommunicator().reset().

5

Thank you!