Displaying ajax errors

[lamoglia]

Prerequisites

• I have searched for similar issues in both open and closed tickets and cannot find a duplicate.
• The issue still exists against the latest master branch of bootstrap-fileinput.
• This is not an usage question. I confirm having read the plugin documentation and demos.
• This is not a general programming / coding question. (Those should be directed to the webtips Q & A forum).
• I have attempted to find the simplest possible steps to reproduce the issue.
• I have included a failing test as a pull request (Optional).

Steps to reproduce the issue

1. I'm starting an ansyc uploader with showAjaxErrorDetails = true (the default)
2. When some server-side validation fails i send the following response:

{
"error":"Imagem deve estar na proporção 16:9.",
"initialPreview":[],
"initialPreviewConfig":[],
"initialPreviewThumbTags":[],
"append":true
}

Expected behavior and actual behavior

When I follow those steps, the error message at "error" tag is displayed like this:

I was expecting...

This line with a single dot don't seems very adequate. I know that the white box inside the alert (first image) seems to be appropriate to display a stack trace (as stated here), but not to show a single error message.

Looking trough the code, I found out that this is being built in the _parseError fucniton

I've changed the function so it behaves as the second picture, but I wish to know if there is some way of doing it without changing the source.

thanks.