How do I run rake tasks within my rails application

Question

What I want to do:

In a model.rb, in after_commit, I want to run rake task ts:reindex

ts:reindex is normally run with a rake ts:index

Answer 1

require 'rake'
RailsApp::Application.load_tasks
class SomeModel <ActiveRecord::Base
  def self.run_rake(task_name)
    load File.join(Rails.root, 'lib', 'tasks', 'custom_task.rake')
    Rake::Task[task_name].invoke
  end
end

And then just use SomeModel.run_rake("ts:reindex").

Answer 2

If you wish this rake code to run during the request cycle then you should avoid running rake via system or any of the exec family (including backticks) as this will start a new ruby interpreter and reload the rails environment each time it is called.

Instead you can call the Rake commands directly as follows :-

require 'rake'

class SomeModel <ActiveRecord::Base

  def self.run_rake(task_name)
    load File.join(RAILS_ROOT, 'lib', 'tasks', 'custom_task.rake')
    Rake::Task[task_name].invoke
  end
end

Note: in Rails 4+, you'll use Rails.root instead of RAILS_ROOT.

And then just use SomeModel.run_rake("ts:reindex")

The key parts here are to require rake and make sure you load the file containing the task definitions.

Most information obtained from http://railsblogger.blogspot.com/2009/03/in-queue_15.html

Answer 3

Have you tried `rake ts:reindex`?

Answer 4

This code automagically loads the Rake tasks for your Rails application without you even knowing how your application is named :)

class MySidekiqTask
  include Sidekiq::Worker

  def perform
    application_name = Rails.application.class.parent_name
    application = Object.const_get(application_name)
    application::Application.load_tasks
    Rake::Task['db:migrate'].invoke
  end
end

Answer 5

I had this same issue and couldn't get the accepted answer to work in my controller with a Rails 4 project due to a load file error. This post gave me a working solution:

def restart_search
   require 'rake'
   spec = Gem::Specification.find_by_name 'thinking-sphinx'
   load "#{spec.gem_dir}/lib/thinking_sphinx/tasks.rb"
   Rake::Task["ts:stop"].execute
   Rake::Task["ts:start"].execute
   respond_to do |format|
     format.js { head :ok }
   end
end