How to run rake tasks from console?

I want to invoke my rake task from console. Is it doable? if yes, how to do so?

I tried this on console:

require 'rake'
Rake::Task['my_task'].invoke

but it give me this error:

RuntimeError: Don't know how to build task

it's like the rake cannot found the task.

any help would be appreciated.

Thank you

Edit: I am using rails 2.3.5

Running your Rake tasks requires two steps:

1. Loading Rake
2. Loading your Rake tasks

You are missing the second step.

Normally this is done in the Rakefile, but you have to do it manually here:

require 'rake'
Rails.application.load_tasks # <-- MISSING LINE
Rake::Task['my_task'].invoke

The easiest way to do it is to run %x[command] from the irb. I'm not sure if what you want to achieve though.

%x[rake db:migrate]

EDIT: I highly recommend to use .invoke as Daniel says in the accepted answer.

The easy way is:

Rails.application.load_tasks
Rake::Task['my_task'].invoke

I am using rails 5.x.x, and was in the need the do the same form rails console.
I have create rake task here-

app/lib/task_to_execute.rake

Here is the command worked for me-

Load Rails.application.load_tasks

Rake::Task['task_to_execute:task_name'].invoke

Worked for me!

Just a note that if you are in the rails console via rails c you can just call/run the rake task method by irb(main):001:0> TaskClassName.new.my_task