Approved
Last Updated: 02 Aug 2019 15:09 by ADMIN
Denis
Created on: 29 Jul 2019 12:25
Category: Grid
Type: Bug Report
1
Items belong to incorrect group and groups are duplicated when using server grouping and endless scrolling

Hi, 

Here is the dojo to reproduce. In this dojo I've created imitation of data, that coming from server in our case. The main idea is to have a grid with lazy loading - it has 10 groups (page 1) and after scrolling down it loads 10 more groups (page 2) and etc.

 

Issue 1. 

After scrolling down, data from the last group is updated with some data, that is not belongs to it. Please see 'Issue1.png' attached.

Issue 2.

Groups from the first page are duplicated after scrolling down. For example, there is a group named 'C3'. After scrolling down, it is duplicated once again. Please see 'Issue2.png' attached. New groups are placed after these duplications. By the way, as groups from the 1st page are duplicated, there is more than 20 groups is shown, but the counted at the bottom of the grid says that '20 of 137' elements are show.

 

So it would be great, if you could fix that. Or even provide temporary fix for us.

Thank you!

3 comments
ADMIN
Angel Petrov
Posted on: 02 Aug 2019 15:09
Hello Denis,

The described behavior seems like a bug in the implementation. Thank you for reporting pointing it out to us. As a token of gratitude for this I have updated your account points.

For now as a workaround one can set one of our internal counters(_skipRerenderItemsCount) manually as demonstrated in this dojo.

Regards,
Angel Petrov
Progress Telerik
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Denis
Posted on: 31 Jul 2019 21:07

Hi Alex,

Thanks for the reply. Please keep me informed about the results. 

ADMIN
Alex Hajigeorgieva
Posted on: 31 Jul 2019 14:46
Hi, Denis,

Thank you very much for the provided runnable example to illustrate the faulty behaviour of the Kendo UI Grid with endless scrolling and server grouping.

It definitely looks like a bug but I will need a little more time to check it over thoroughly before I can log it in the public repository.

Please accept our apology for the inconvenience.

Kind Regards,
Alex Hajigeorgieva
Progress Telerik
Get quickly onboarded and successful with your Telerik and/or Kendo UI products with the Virtual Classroom free technical training, available to all active customers. Learn More.