Destroy methods removes item from datasource without server check

[Jakub]

Hello

Iam using datasource in kendoGrid. Kendogrid has mode inline, so I can edit add and delete rows. To each method I use my own ajax calls. The problem is that If I delete row, then row is deleted from datasource and then the call to destroy function is made. Thats why I cannot prevent user from deleting this row as it may fail on server side. Is there any option to make it work to say to datasource, first wait for server response then delete row if server succeeded?

Example:

http://dojo.telerik.com/UMUSu/2

[Rosen]

Hello Jakub,

Indeed, this is the designed behavior of the widget. However, you should use the DataSource cancelChanges method inside the error event handler in order to revert the deleted record. For example:

error: function(e)
{
    this.cancelChanges();
    alert('error');
}

Regards,
Rosen
Telerik

 

 

[Jakub]

This generates another problem as it will delete my row, then after I will get response from WebApi and cancel changes, the datasource will add element to grid. Its not acceptable:

http://dojo.telerik.com/UMUSu/4

[Rosen]

Hello Jakub,

Indeed, this is how it is designed to work. As I have mentioned in my previous message, the cancelChanges method will revert changes, making the deleted record to appear in the Grid again.

When given record is deleted it is removed from the DataSource's data thus, it is removed from the Grid content. Then when the DataSource is synced this record is actually send to the server for deletion. Therefore, with this event flow, it is only possible reverted back, not to prevent it from "disappearing", from the DataSource data when a server error during sync call occurs.

Regards,
Rosen
Telerik