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Databinding async methods

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ksuh
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ksuh asked on 16 Nov 2020, 04:10 PM
     Is it possible to databind methods that are async?  I have a method that does an axios call that must be async, thus making the databinding call async.

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Ivan Danchev
Telerik team
answered on 18 Nov 2020, 11:39 AM

Hello,

See the following thread on stackoverflow, which discusses such scenario: https://stackoverflow.com/questions/52247040/kendo-datasource-reading-from-async-await-method-which-uses-axios-to-fetch-data

Regards,
Ivan Danchev
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ksuh
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answered on 30 Nov 2020, 06:00 PM

Unfortunately not useful at all, I am not binding to a datasource.

Async/await has been around for years in Javascript, a disappointment at the extremely limited support for it in Kendo UI.

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ksuh
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answered on 02 Dec 2020, 12:07 AM

I was able to create a custom binding to make it work.

They really should be built-in, they're trivial to implement.

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ksuh
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answered on 02 Dec 2020, 12:08 AM
kendo.data.binders.textAsync = kendo.data.Binder.extend({
        refresh: async function ()
        {
            const text = await this.bindings['textAsync'].get();
 
            const dataFormat = this.element.getAttribute("data-" + kendo.ns + "format") || "";
 
            if (text == null)
            {
                text = '';
            }
 
            $(this.element).text(kendo.toString(text, dataFormat));
        }
    });
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ksuh
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answered on 02 Dec 2020, 12:14 AM
Ok, so binding something like text is simple.  However, doing async events is another matter.  Those really should be implemented by you guys.
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Ivan Danchev
Telerik team
answered on 02 Dec 2020, 10:45 AM

Hello Ksuh,

Thank you for sharing your approach with the community. This feature hasn't been requested yet: https://feedback.telerik.com/kendo-jquery-ui , thus we don't have data on what the interest in it is, to plan it accordingly.

Regards,
Ivan Danchev
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Ivan Danchev
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ksuh
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