Is there no "Keep in Sync" option?

[sitefinitysteve]

I have mis-wired up my update call...so in firebug I see the ajax call just tank, however the client object updates perfectly fine...idea is there's no "save" button changes are reflected instantly.

Am I missing this option in the docs?  autoSync doesn't seem to do it (or maybe is *causing* it)

Steve

[Alexander Valchev]

Hello Steve,

The dataSource submits pending changes to the server through the sync method. If the autoSync option is enabled, then the synchronization will be triggered automatically as soon as the data changes. 
If autoSync is disabled (that is the default state) changes should be submitted manually - when the user clicks a button or by the developer via JavaScript API.
I hope this information will help.

Regards,
Alexander Valchev
Telerik

[sitefinitysteve]

It helps understand what happens with the datasource, but if the update call fails, shouldn't the update on the client then also "revert"\not save?  Because once the $ajax tanks the data from the kendo DS is now *BAD*...

[Alexander Valchev]

Hi Steve,

If the transport operation is not successful (in your case the update Ajax request fails), the DataSource will attempt to re-submit the changes during next synchronization. In other words the changes will be still considered as pending.

If you want to revert the changes upon transport failure, I suggest hooking up to the error event of the DataSource and calling cancelChanges method.

On a side note, I do not understand what you mean by "Because once the $ajax tanks the data from the kendo DS is now *BAD*...". In case you need further assistance, please provide a more detailed description.

Regards,
Alexander Valchev
Telerik

[sitefinitysteve]

Clarification:

Kendo says value is 3, trys the ajax callback...fails, but kendo doesn't revert back to the previous value

So now kendo (and thus the user) thinks they've successfully updated the value to "3", but they haven't.

[Alexander Valchev]

Hi Steve,

As I tried to explain in my previous post, if the Ajax call fails Kendo DataSource will not revert the back to the previous value. It will try to re-submit the change when the DataSource is synchronized again.

If you want to revert the changes upon transport failure, I suggest hooking up to the error event of the DataSource and calling cancelChanges method.

Did you tried this solution? What kind of problems you experienced with it?

Regards,
Alexander Valchev
Telerik

[sitefinitysteve]

Okay so the function is there....but it's up to me to handle