ChatGPT解决这个技术问题 Extra ChatGPT

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


D
Daniel Rikowski

Running your Rake tasks requires two steps:

Loading Rake 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

For more options please consult stackoverflow.com/questions/577944/…
You might want to note the difference between saying .invoke and .execute, if you need to run the task several times (such as a data sanity checker with an app that takes too long to start up) then you'll want to .execute the task.
If you need to pass arguments, do it in the invoke method: .invoke(arg1, arg2,...)
Is this the best approach when needing to run a rake task from within the app itself? (for example I will run db:seed each time the test suite runs to reseed the database. I used the above code and it works, just wondering if it's best practice or if there's some other way?
g
garno

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 problem is, rake doesn't seem to recognize my task. any idea why?
it works perfectly @garno ! sorry I know it's been a year and suddenly I am running into the same need.
You can also surround it in back ticks if you'd like.
This is slow because it has to spin up a new process and instantiating your Rails app again. invoke is better and more efficient.
M
Mohamed Ziata

The easy way is:

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

This is not only the easy way but also means you're not spinning up a new process and instantiating your Rails app again. Easy AND Fast!
S
S.Yadav

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!


a
aabiro

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