active_admin paperclip multiple image uploads

[johnkock]

I'm attempting to integrate paperclip into active_admin. I'm trying to create multiple image upload functionality into it.
Can anyone steer me in the right direction?

[macfanatic]

Add paperclip to your gem file & run bundle to install it.

I created an Attachment model for my application, as several of my models were going to be able to have attachments.

class Attachment < ActiveRecord::Base

  MAX_FILESIZE = 50.megabytes

  belongs_to :attachable, :polymorphic => true

  delegate :path, :url, :content_type, :to => :asset

  has_attached_file :asset, :path => ":rails_root/attachments/:attachment/:id/:style/:filename", :url => "/attachments/:id/:basename.:extension"
  validates_attachment_presence :asset
  validates_attachment_size :asset, :less_than => MAX_FILESIZE

end

Setup the relationship between your target model & attachment model (polymorphic):

class Vendor < ActiveRecord::Base
  has_many :attachments, :as => :attachable, :dependent => :destroy
  accepts_nested_attributes_for :attachments, :allow_destroy => true
end

Then I setup my ActiveAdmin form action as:

ActiveAdmin.register Vendor do
  form :partial => "form"
end

Then to create the views to render all the pieces....

app/views/admin/attachments/_form.html.erb

<% unless resource.new_record? %>

    <%= form.inputs "#{resource.class.name.titlecase} Documents (#{number_to_human_size Attachment::MAX_FILESIZE} Max Each)" do %>

        <% 3.times { resource.attachments.build }; index = 1 %>
        <%= form.semantic_fields_for :attachments do |attachment| %>
            <% if attachment.object.new_record? %>
                <%= attachment.input :asset, :as => :file, :label => "Attachment %s" % [index] %>
            <% else %>
                <li>
                    <label>Attachment <%= index %> (<%= attachment.check_box :_destroy %> Delete?)</label>
                    <%= link_to( File.basename( attachment.object.asset.path ), attachment.object.asset.url ) %>
                </li>
            <% end; index += 1 %>
        <% end %>

    <% end %>

<% end %>

app/views/admin/vendors/_form.html.erb

<%= semantic_form_for [:app, @vendor], :html => { :class => "filter_form", :multipart => true } do |f| %>

    <%= f.inputs "Vendor Information" do %>
        <%= f.input :name %>
        <%= f.input :phone %>
        <%= f.input :email %>
        <%= f.input :vendor_categories, :as => :check_boxes, :label => "Vendor Categories" %>
    <% end %>

    <%= render :partial => "app/addresses/form", :locals => { :form => f } %>

    <%= render :partial => "app/attachments/form", :locals => { :form => f, :resource => @vendor } %>

    <%= f.buttons %>

<% end %>

Now I can use the attachments upload for any model relatively easily in my application.

[jdx]

Not to further complicate matters, but I would suggest carrierwave instead of paperclip. Multiple image uploads are super easy with it.

[johnkock]

Thanks for the assistance but I would like to upload multiple images in associated with one model. I have an events model but I would like to display several (probably 5) images for that event. I'd like to integrate that functionality into active_admin.

Thanks

[macfanatic]

I'm not sure what the problem is in that scenario then - create you form fields ("f.input") as you would for any other attribute on that model.

[jcuervo]

@johnkock - I managed to integrate cocoon in my app with active_admin (https://github.com/nathanvda/cocoon). I think this will help you as well.