Accept $validationBag in old() helper function

[misog]

Hi, sometimes there are two or more forms in one page. They can contain fields with the same name.

For example, there is a table of articles and each article row contains <form method="post"> with publication_date and a button which publishes the article. It is not possible to use old() method for the publication_date because it would change all such fields of all articles after failed validation.

One workaround is to suffix publication_date with ID of the article: publication_date . '_' . $article->id however that is not very good solution if there are multiple fields, also validation is problematic.

I propose to modify the old() method or create a new method which would accept $validationBag name and could be used with already existing validation mechanism $request->validateWithBag('publish-' . $article->id). Then after failed validation, only one old() function would actually produced old data. Other old() functions would use default values.