ActiveAdmin jQuery File Upload

An ActiveAdmin 2.x plugin to use jQuery-File-Upload for file uploads in forms.

Features:

• AJAX uploads;
• chunked file uploads for large files;
• works with ActiveStorage.

The file is uploaded when selected, not when the form is submitted, that's why a record must exist for uploads.

• Update your Gemfile: gem 'activeadmin_jfu_upload' (and execute bundle)
• Add at the end of your ActiveAdmin styles (app/assets/stylesheets/active_admin.scss):

@import 'activeadmin/jfu_upload_input';

• Add at the end of your ActiveAdmin javascripts (app/assets/javascripts/active_admin.js):

//= require activeadmin/jfu_upload/jquery.fileupload
//= require activeadmin/jfu_upload_input

• Use the input with as: :jfu_upload in Active Admin model conf

Why 2 separated scripts? In this way you can include a different version of jQuery-File-Upload if you like.

data-options: permits to set jQuery-File-Upload options directly - see options list

# ActiveAdmin article form conf:
  # (optional) Upload action - an helper method is provided
  member_action :jfu_upload, method: [:patch] do
    render json: ActiveAdmin::JfuUpload::Engine::upload_file( request, params[:article][:cover], resource, :cover )
  end

  # Form setup
  form do |f|
    f.inputs 'Article' do
      f.input :title
      # Field setup - hint with file presence check using ActiveStorage
      f.input :cover, as: :jfu_upload, hint: (object.avatar.attached? ? "Current: #{object.avatar.filename}" : nil) unless object.new_record?
      f.input :published
    end
    f.actions
  end

  # Show setup (optional)
  show do
    attributes_table do
      # ...
      row :cover do |record|
        image_tag url_for(record.cover) if record.cover.attached?
      end
    end
    active_admin_comments
  end

# Chuncked upload (chunk size: 100 Kb) - checking presence with CarrierWave
f.input :cover, as: :jfu_upload, hint: f.object.cover? ? image_tag( f.object.cover.url ) : '', input_html: { data: { url: jfu_upload_admin_article_path( resource.id ), options: { maxChunkSize: 100000 } } } unless f.object.new_record?

More example in spec dummy app.

• The string field for the upload is used to store temp data, so it could be necessary to make it bigger
• If you want to customize the upload action take a look here
• Tested with CarrierWave uploader gem and with ActiveStorage
• To use this plugins with ActiveAdmin 1.x please use the version 0.1.8

If you use this component just star it. A developer is more motivated to improve a project when there is some interest. My other Active Admin components.

Or consider offering me a coffee, it's a small thing but it is greatly appreciated: about me.

• Mattia Roccoberton - creator, maintainer

MIT