First draft of an active_admin-based view for Delayed::Job

dashboards.rb

ActiveAdmin::Dashboards.build do
  # Add this section in your dashboard...

  section "Background Jobs" do
    now = Time.now.getgm
    ul do
      li do
        jobs = Delayed::Job.where('failed_at is not null').count(:id)
        link_to "#{jobs} failing jobs", admin_jobs_path(q: {failed_at_is_not_null: true}), style: 'color: red'
      end
      li do
        jobs = Delayed::Job.where('run_at <= ?', now).count(:id)
        link_to "#{jobs} late jobs", admin_jobs_path(q: {run_at_lte: now.to_s(:db)}), style: 'color: hsl(40, 100%, 40%)'
      end
      li do
        jobs = Delayed::Job.where('run_at >= ?', now).count(:id)
        link_to "#{jobs} scheduled jobs", admin_jobs_path(q: {run_at_gte: now.to_s(:db)}), style: 'color: green'
      end
    end
  end

  # ...
end

jobs.rb

ActiveAdmin.register Delayed::Job, as: 'Job' do
  menu parent: 'Admin'

  actions :index, :show, :edit, :update, :destroy

  index do
    column :id
    column :queue
    column :priority
    column :attempts
    column :failed_at
    column :run_at
    column :created_at
    column :locked_by
    column :locked_at
    default_actions
  end

  form do |f|
    f.inputs "Scheduling" do
      f.input :priority
      f.input :queue
      f.input :run_at
    end

    f.inputs "Details" do
      f.input :id, input_html:          {disabled: true}
      f.input :created_at, input_html:  {disabled: true}
      f.input :updated_at, input_html:  {disabled: true}
      f.input :handler, input_html:     {disabled: true}
    end

    f.inputs "Diagnostics" do
      f.input :attempts,    input_html: {disabled: true}
      f.input :failed_at,   input_html: {disabled: true}
      f.input :last_error,  input_html: {disabled: true}
      f.input :locked_at,   input_html: {disabled: true}
      f.input :locked_by,   input_html: {disabled: true}
    end
    f.buttons
  end

  action_item :only => [:edit] do
    link_to 'Delete Job', admin_job_path(resource),
            'data-method' => :delete, 'data-confirm' => 'Are you sure?'
  end

  action_item :only => [:show, :edit] do
    link_to 'Schedule now', run_now_admin_job_path(resource), 'data-method' => :post,
      :title => 'Cause a job scheduled in the future to run now.'
  end

  action_item :only => [:show, :edit] do
    link_to 'Reset Job', reset_admin_job_path(resource), 'data-method' => :post,
      :title => 'Resets the state caused by errors. Lets a worker give it another go ASAP.'
  end

  member_action :run_now, :method => :post do
    resource.update_attributes run_at: Time.now
    redirect_to action: :index
  end

  member_action :reset, :method => :post do
    resource.update_attributes locked_at: nil, locked_by: nil, attempts: 0, last_error: nil
    resource.update_attribute :attempts, 0
    redirect_to action: :index
  end

end

That looks like a pretty awesome piece... I'm assuming (or at least it looks like) it might be similar to resque for redis? Can you re-kick failed tasks? I don't use Delayed::Jobs, so I have no where I can plug in quickly.

@jancel yes, that's what the last part is about (sidebar and member_action).

It assumes that the workers are running properly (it only re-schedules the task to "right now"). But by default, Delayed::Job retries 20 times with exponential re-scheduling. My retry is simplistic in that it doesn't try to address the case where the max amount of retries is already reached.

It would also be possible to force the task to be performed in-request. That would make sense for an admin trying to fix the task and not minding that the email is going to happen in-request, for example.

That would look like job.handler.perform, iirc. But there's potential issues with that. The objects are serialized with YAML and if something fancier than pure Ruby or basic Rails classes are in there, you'd need to require them in the controller. I didn't wanna get into that. I don't need it yet.

And all of that niceness is just ActiveAdmin itself. I have no merit for that :-) I only picked the order in which the fields made most sense to be viewed.

That's great. For the permalink, try out:

ActiveAdmin.register Delayed::Job, :as => "Job" do
  #...
end

Ah, nice! Thanks for the pointer :-)

Works great, thanks!

You should package this up as a gem...

Glad to know it works well for you :-)

On Tuesday, April 24, 2012, David Stephens wrote: Works great, thanks! You should package this up as a gem... --- Reply to this email directly or view it on GitHub: https://gist.github.com/1887148

##

…

--- @webmat http://twitter.com/webmat git-remote-branch http://rubygems.org/gems/git_remote_branch on GitHub https://github.com/webmat

ActiveAdmin.register_page "Dashboard" do

...

content :title => proc{ I18n.t("active_admin.dashboard") } do
# ...
section "Background Jobs" do ....# section should be covered by content else undefined method `section' for #ActiveAdmin::PageDSL:0x000000076d9d48 (NoMethodError)
# ...
end

...

end

did you define any custom paths? because I am getting below on view

undefined method `run_now_admin_job_path' for #ActiveAdmin::Views::ActionItems:0x00000007fae2e8

Hello. This looks great. I keep getting this message though: "undefined method `per_page_kaminari' for []:ActiveRecord::Relation"
I'm using will_paginate in the app. I added the kaminari.rb initializer in the documentation. All the other pages work fine, but not this one. For some reason the config file seems to be ignored here.
Any ideas?
Thanks!
Alexandre

rails (3.2.11)
activeadmin (0.5.1)
kaminari (>= 0.13.0)

+1 @alesthome Same issue here...

@alesthome and @kylemacey,

modify your kaminari.rb initialiser like this:

if defined?(WillPaginate)
  module WillPaginate
    module ActiveRecord
      module RelationMethods
        def per(value = nil) per_page(value) end
        def total_count() count end
      end
    end
    module CollectionMethods
      alias_method :num_pages, :total_pages
    end
  end
end

@amoulpujari, the code assumes you are using the default admin namespace. If you've changed config.default_namespace in your active_admin initialiser, you'll need to change the routes accordingly.

Really nice, thanks @webmat! You've saved me a big job :)

@trivially genius!
Saved my day, thank you!

Strange, this just isn't working in our setup - I get "You are not authorized to perform this action." and it doesn't appear in the menu... struggling to see why!

If I change 'Delayed::Job' to one of our other models it works fine, seems like it might not be able to find the model for some reason.

Very nice, thank you,

I've forked it and added 2 scopes that allow you to easily see the failed and completed jobs

https://gist.github.com/balauru/5706272

@webmat
Very helpful gist! Thank you! Saved me a lot of trouble...

@forwardadvance
thanks a lot it worked! I think it's worth noticing that I had to replace the code suggested in the gem documentation, i.e.

Kaminari.configure do |config|
  config.page_method_name = :per_page_kaminari
end

with the code you suggested.