Do rails rake tasks provide access to ActiveRecord models?

user_51442 0
Viewed 58870

I am trying to create a custom rake task, but it seems I dont have access to my models. I thought this was something implicitly included with rails task.

I have the following code in lib/tasks/test.rake:

namespace :test do
  task :new_task do
    puts Parent.all.inspect
  end
end

And here is what my parent model looks like:

class Parent < ActiveRecord::Base
  has_many :children
end

It's a pretty simple example, but I get the following error:

/> rake test:new_task
(in /Users/arash/Documents/dev/soft_deletes)
rake aborted!
uninitialized constant Parent

(See full trace by running task with --trace)

Any ideas? Thanks

task rake activerecord ruby-on-rails
6 Answers

Figured it out, the task should look like:

namespace :test do
  task :new_task => :environment do
    puts Parent.all.inspect
  end
end

Notice the => :environment dependency added to the task

user_514420

you might need to require your configuration (which should specify all your required models etc)

eg:

require 'config/environment'

alternatively you can just require each seperately, but you might have environment issues AR not set up etc)

user_1085780

With the new ruby hash syntax (Ruby 1.9) the environment will be added like this to the rake task: 

namespace :test do
  task new_task: :environment do
    puts Parent.all.inspect
  end
end
user_37694510

Generate task using below command (namespace with task name):

rails g task test new_task

Use below syntax to add logic:

namespace :test do
  desc 'Test new task'
  task new_task: :environment do
    puts Parent.all.inspect
  end
end

Run above task using below command:

bundle exec rake test:new_task

or

 rake test:new_task
user_43910720
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