Active Admin Jobs

It's a Rails engine that allows you to play nice with Active Job in Active Admin providing user feedback.

• An Active Admin's index view to list jobs.
• An Active Admin's show view to see job details with a special panel to show success/error feedback. To achieve this we are going to use the Job Notifier gem.
• A way to customize the success and error partials.
• A mechanism to listen job status changes and notify them using jQuery Growl

Installation

Add to your Gemfile:

source 'https://rails-assets.org' do
  gem 'rails-assets-growl', '~> 1.3.1'
end

gem "activeadmin_jobs"

bundle install

rails generate activeadmin_jobs:install

If you use AdminUser class in ActiveAdmin you will need to add the following code:

class AdminUser < ActiveRecord::Base
  include JobNotifier::Identifier
  identify_job_through(:id, :email)

  # more code...
end

Usage

To make it easy I'm going to explain how to use this gem with an example.

Example:

As an admin user:

1. From a form, I want to pick a big .xls file containing users information.
2. In the endpoint pointed by the form, I want to create a job to parse that heavy file in background to create users in the system.
3. I need a way to know when the process is completed.
4. Also, I want to see success and error feedback.

Next, I will explain how to solve each step:

Step 1: pick the file.

Suppose you want to go to the import form from the AdminUser's index page. To do that, you can add an action_item with a collection_action:

/your_app/app/admin/admin_users.rb

ActiveAdmin.register AdminUser do
  # more code...
  action_item :import_users, only: :index do
    link_to "Import Users", import_form_admin_admin_users_path
  end

  collection_action :import_form, title: "Import Users" do
    # Nothing here. We just want to render the form.
  end
end

With the related wiew:

your_app/app/views/admin/admin_users/import_form.html.erb

<%= semantic_form_for :data, url: { action: :import }, method: :post do |f| %>
  <%= f.inputs "Form" do %>
    <%= f.input :source, as: :file, label: "File", :hint => "Excel file with thousands rows that need to be processed in background..." %>
  <% end %>
  <%= f.actions do %>
    <%= f.action :submit, as: :button, label: "Import" %>
  <% end %>
<% end %>

You need to add the endpoint pointed in the form action too.

/your_app/app/admin/admin_users.rb

ActiveAdmin.register AdminUser do
  # more code...
  collection_action :import, title: "Import Users", method: :post do
    # We fill this in the next step.
  end
end

Step 2: create a job.

Inside the import action definition, you need to call the job in charge of parsing the .xls file. To do this:

First, we need to create the job. We need to do it using perform_with_feedback method provided by Job Notifier gem. You can see how it works reading the Third and Fourth Steps of the usage section.

/your_app/app/jobs/user_upload_job.rb

class UserUploadJob < ActiveJob::Base
  def perform_with_feedback(xls_path)
    # Here you need to process the file an return a success or error result.
    #
    # Lets say I'm going to return this message:
    #
    # "Users successfully loaded"
    #
    # with a successful result and something like this:
    #
    # errors = [
    #   { row: 4, errors: ["Invalid First Name", "Invalid Category"] },
    #   { row: 6, errors: ["Invalid Last Name"] },
    #   { row: 84, errors: ["Invalid ID"] }
    # ]
    #
    # raise JobNotifier::Error::Validation.new(errors)
    #
    # with unsuccessful result.
  end
end

Then, we call the job in the import action:

/your_app/app/admin/admin_users.rb

ActiveAdmin.register AdminUser do
  # more code...
  collection_action :import, title: "Import Users", method: :post do
    file_path = get_file_path(params[:data][:source]) # I'm not going to implement this. It's just an example.
    UserUploadJob.perform_later(current_admin_user.job_identifier, file_path)
  end
end

Step 3: notify process completion.

You don't need to do nothing here, the gem will do it for you using jQuery Growl.

On success...

On error...

Step 4: show success and error feedback.

The gem includes an index view for jobs. There, you can see a jobs list with the current state of each job.

To show feedback, you need to add one partial by possible job state prefixed by the job's class name in snake_case. For example: If you have the UserUploadJob job, following the convention: _[job_class_name].[job_state].html.erb, you will need two partials:

One for success...

/your_app/app/views/admin/jobs/_user_upload_job.finished.html.erb

<%= result %>

Remember: we get this: "Users successfully loaded" as result on success.

One for error...

/your_app/app/views/admin/jobs/_user_upload_job.failed.html.erb

<h2>Errors :(</h2>

<% result.each do |record| %>
  <h3>Row #<%= record[:row] %>:</h3>
  <ul>
    <% record[:errors].each do |error| %>
      <li><%= error %></li>
    <% end %>
  </ul>
<% end %>

Remember: we get something like this:

[
  { row: 4, errors: ["Invalid First Name", "Invalid Category"] },
  { row: 6, errors: ["Invalid Last Name"] },
  { row: 84, errors: ["Invalid ID"] }
]

as result on error.

Those partials will be rendered in the job's show view depending on its state.

I18n

If you want to translate your notifications, you can do it following this convention:

/your_app/config/locales/en.yml

en:
  activeadmin_jobs:
    [job_class_name]:
      description: "XXX"
      finished:
        title: "XXX"
        one: "XXX"
        other: "XXX"
      failed:
        title: "XXX"
        one: "XXX"
        other: "XXX"

For example:

en:
  activeadmin_jobs:
    user_upload_job:
      description: "Users upload through .xls file"
      finished:
        title: "Users have been uploaded! :)"
        one: "One .xls file was completed with no errors. Click here to see the result"
        other: ".xls files were completed with no errors. Click here to see the result"
      failed:
        title: "Error trying to upload users :("
        one: "One .xls file could not be uploaded. Click here to see errors"
        other: ".xls files could not be uploaded. Click here to see errors"

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request

Credits

Thank you contributors!

Active Admin Jobs is maintained by platanus.

License

Active Admin Jobs is © 2016 platanus, spa. It is free software and may be redistributed under the terms specified in the LICENSE file.