The simplest multiple file upload I have seen is using the browser-native
method of applying multiple: true to the file field. (This does exclude older
versions of IE, but they will simply be able to upload a single file.)
To make this work, the form must be on the parent of the association -- so if
you have a Catalog that has_many Products, you would create a nested form on
the Catalog, with accepts_nested_attributes_for :products set on that model,
and the Product would have an attachment of some sort (Paperclip, CarrierWave,
Dragonfly) to accept the file.
The other key to this trick is the naming of the field. Here's a copy-paste
from such a field in a live application:
<%= file_field_tag('project_assets_attributes_blob', multiple: true,
name: "project[assets_attributes][][blob]") %>
(Yes, I did learn why you don't name your model Asset -- please don't copy this
exactly.)
As far as I can determine, there's no good way to get the Rails form view
helpers to write out this name directly, so specifying it like this makes it
unambiguous what you are up to.
The only other thing you need to do is properly educate your users that they
can Shift-click to select a contiguous group of files, or Command/Control click
to select a discontiguous group.
Walter
On Mar 4, 2014, at 6:43 AM, Subbu Edimbeta wrote:
> Hi,
>
>
> I am newbie to Ruby on Rails.I am trying to develop multiple files
> upload sample app using any plugin with Rails 4.0 version,
> but I haven't find much information on that over the web.
>
>
> So,Please suggest me or provide any info to develop it.
>
>
> Thanks,
> Subbu
>
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