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kendoWidget() returning null for upload

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Wayne Hiller
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Wayne Hiller asked on 19 Jun 2018, 05:30 PM

I have a kendo upload inside a kendo window with ref=upload. On window activate I want to clear the files list. 

activate() {

    this.$refs.upload.kendoWidget().clearAllFiles();

}

 

Everything works fine until I upload a file. Once a file is uploaded the call to this.$refs.upload.kendoWidget() starts returning null.

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Ianko
Telerik team
answered on 21 Jun 2018, 10:18 AM
Hello Wayne,

This should be fixed with the latest release. Try upgrading and retest the case. Here you are the logged item: https://github.com/telerik/kendo-ui-core/issues/4147.

Regards,
Ianko
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Wayne Hiller
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answered on 21 Jun 2018, 02:06 PM
What version is it fixed in? The issue is still there in version 2018.2.620.
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Ianko
Telerik team
answered on 21 Jun 2018, 02:20 PM
Hello Wayne,

Yes, this is the version that includes the fix. Also, testing with this plunker here (https://plnkr.co/edit/pdIy7BScHrs7Xgswq9Dh?p=preview) I see that the reference to the widget is properly returned. 

If you have a different scenario, can you provide some sample code or runnable example to examine that further?

Regards,
Ianko
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Wayne Hiller
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answered on 21 Jun 2018, 04:03 PM

The package.json file in the node_modules\@progress\kendo-ui folder shows version 2018.2.620 but for some weird reason the js files all have a date of 10/26/1985? My computer date/time is correct.

 

I will see if can can reproduce the issue in a simple demo.

 

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Wayne Hiller
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answered on 21 Jun 2018, 05:44 PM

Try clicking the Clear button a few times after an upload.

 

 

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Ianko
Telerik team
answered on 22 Jun 2018, 04:57 AM
Hi Wayne,

Thanks for the example. Clearing seems to break the kendoWidget method as well. I reopened the issue so that this case is handled too. 

A possible workaround with latest version is to change the getting of the instance like so: 

var uploadComponent = this.$refs.upload
var uploadWidget = uploadComponent.kendoWidget() || uploadComponent.$_upload
uploadWidget.clearAllFiles()


Regards,
Ianko
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Wayne Hiller
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answered on 22 Jun 2018, 01:44 PM
That works, thank you.
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Wayne Hiller
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answered on 22 Jun 2018, 01:52 PM
My my case the upload is in a kendo window. Is there any way to have a window destroy it's contents on close and then recreate it on open? I would like to populate the files property of the upload when a window is opened but currently the files of the upload can only be set during creation. 
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Ianko
Telerik team
answered on 25 Jun 2018, 09:44 AM
Hello Wayne,

I am afraid, the Upload cannot update its files collection dynamically. You will need to destroy the instance, remove the files container and recreate the widget. Here you are an example: https://plnkr.co/edit/ME0ipd5V0VB2FokgHg2O?p=preview

If you are to destroy the Window contents, the Vue $el will be removed too and the Vue component might fail to process the vnode afterwards. 

Regards,
Ianko
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Wayne Hiller
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Ianko
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Wayne Hiller
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