How to add custom attributes using custom upload adapter?

[dzpt]

I want to put few extra attributes to the img tag while using custom upload adapter like this

<img data-id='123' src='....' />

Since the upload API only accepts Promise object with uploaded urls, i don't know how do i do it.

{
	default: 'http://server/default-size.image.png',
	'160': 'http://server/size-160.image.png',
	'500': 'http://server/size-500.image.png',
	'1000': 'http://server/size-1000.image.png',
	'1052': 'http://server/default-size.image.png'
}

[Mgsy]

Hi, thanks for the report. Actually, we have a feature request for custom attributes in upload adapters (with a proposed solution which might interest you), so I'm closing it as a duplicate.