Bug report

When kendo.observable is updated based on a selected TreeView node an error VM6996:1 Uncaught SyntaxError: "undefined" is not valid JSON is thrown.

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/CESnRsTi
2. Click on the first button
3. Click in the input filed and type some text
4. Press 'Enter' or click otuside the input to blur

Current behavior

An error Uncaught SyntaxError: "undefined" is not valid JSON is thrown.

Expected/desired behavior

There should be no error and the observable should be updated correctly.

The issue is a regression starting with 2024.3.806

Environment

• Kendo UI version: 2024.3.1015
• Browser: [all ]

Bug report

The performance when using the filter method to filter the data in DataSource and Hierarchical datasource is decreased.

Reproduction of the problem

1. Open the following Dojo example and test it with different Kendo versions: - https://dojo.telerik.com/@NeliKondova/UGomaNEX

Current behavior

There is a perfromance decrease when using the filter method with the latest Kendo version:

Expected/desired behavior

The performance of the filter method should be improved.

Environment

• Kendo UI version: 2023.2.829
• Browser: [all]

Bug report

In a DropDownList with local data and virtualization enabled. when the value is set after initialization using the value method, the change event is fired when the component is opened and closed, without actually changing its value.

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/@NeliKondova/EmOCUqiq and observe the browser console
2. Open and close the popup without selecting a value.

Current behavior

The change event is fired.

Expected/desired behavior

The change event should not be fired when the value is set through the value method.

Environment

• Kendo UI version: 2023.2.606
• Browser: [all ]

Bug report

The dataSource filter configuration only accepts string as value.

Reproduction of the problem

1. Open the Dojo example - https://dojo.telerik.com/@martin.tabakov@progress.com/uVAgAYem
2. Open the MultiSelect.

Current behavior

An error is thrown and the MultiSelect does not open.

Expected/desired behavior

There should be no error and the MultiSelect should open.

Environment

• Kendo UI version: 2021.2.511
• Browser: [all]

It would be nice to be able to specify in a datasource filter two fields and an operator for the sake of data reporting. For example, where "completed date" is greater than "promised date" or "Actual cost" is greater than "estimated cost."

This sort of thing can be accomplished by calculated fields; a filter of where "cost overage" is greater than 0. The down side of the calculated field approach is all comparisons need to be pre-defined. 

We use the new version of SignalR which is 2.2.3 currently and it seems the Kendo DataSource cannot bind to it. It would be awesome if Kendo supported it. 
Here is a link: https://www.nuget.org/packages/Microsoft.AspNet.SignalR.Core/

IMHO it would be good to separate the DTOs and the serializer/deserializer into separate assembly packages and document the protocols used to communicate with telerik components as developers may create multi layered applications without having to deploy the full telerik package eg. in business logic layers or data access layers

Please consider adding support for the new improved Signalr core to be used as an async data source and or server side rpc which would allow for greater mvvm spa applications 

Add the options to open data source by pressing the "Down Arrow" in the keyboard in the next components: 
autoComplete/ dropDownList/ comboBox

The DataSource API currently includes the methods pushCreate, pushDestroy, and pushUpdate.  These methods roughly correspond to add, remove, and set.  Unfortunately there is no pushInsert to enable adding new items to the data source at a specific position.  Adding such a method would be consistent with the existing add/remove/insert methods.

This feature was already requested in another post, but it was missunderstood. (http://kendoui-feedback.telerik.com/forums/127393-kendo-ui-feedback/suggestions/11578722-support-sorting-datasource-groups)

The idea is to allow for Groups in DataSources to be sorted in ways other than alphabetically; this will allow for certain groups to be given priority.

One should be able to group by a specified field, and then sort the groups themselves NOT by that field but by another field. For instance, it is currently not possible to sort data by its name but order it by its date.

It would be really useful to be able to modify request parameters in the RequestStart event of the dataSource; this would be consistent with the functionality of the Kendo Tooltip RequestStart Event.

In order to clearly identify if a datasource operation is successful, 
two alternatives are possible:

1. Add success event to the datasource in order to get datasource operations separated from update, destroy, add. 

2. Enhance change event by error array. 
Currently, the change even is fired even in case of an error. So, at least an error array containing error messages should be available, together with a property "hasErrors".

Ignore language specific characters when filtering. Example: search phrase "Deja" should find word "Déjà".

"WebAPI now uses the DateTimeOffset time as a main type when it comes to dates. However DateTimeOffet requires the Model(that the dataSource creates) to keep information for both Date and Offset which is not possible with the current architecture of the DataSource and Model of Kendo." Based on http://docs.telerik.com/kendo-ui/aspnet-mvc/helpers/grid/how-to/oData-v4-web-api-controller
Please add full support, also when working with Dates. Thanks.

As requested in this thread:
http://www.telerik.com/forums/filtering-support-for-pivotgrid-pivotdatasource

I think it would be extremely helpful to offer the same level of filtering on the PivotDataSource for a consistent development experience (especially since PivotDataSource 'inherits' from DataSource:
http://docs.telerik.com/kendo-ui/api/javascript/data/pivotdatasource).

Thanks!

Hello,

 I knew there was "set" function for kendo.data.ObservableObject, it could change value of specified field.

But after this action, we need call "sync" method for data source manually, and sync action will fire some events/ data bound again.

Is there another method, that we only hope sync value of specified field, without fire events and data bound again?

Thank you.

For easy using local arrays with kendo DataSource it would be good to have a functionallity to assign an array (kendo.obersvableHierarchy) without configure transport for CRUD operations.
When using Kendo MVVM it's easy then to define a grid the columns and field, and bind only the observable array as datasource.

And it would be great to have the possibility to assing depended arrays as field in an array that will be used as datasource for a grid or dropdown. Then we can assing the depended array of a selected dataitem to another control. So there is an need to have a special datatype like "dependedArray" and changes to this depended array has no effect to all ohter controls that where the viewmodel was bound.
Then we have more time to develope business logic. 

I am creating a realestate website, I want my url to be readable,

For example my site url is http://sitename/property/3, (3 represents property id)

I want to change it like this link  www.paarthrepubliclucknow.in

Of course they are using id and all. How can I replace "property" with something like "residential-property-in-india" in my url and it should be changing dynamically according to search.

I hope it is clear what I want to do...