how to pass multiple parameters to rake task

Question

I want to pass multiple parameter but I don't know the numbers. Such as model names. How do I pass those parameters into a rake task and how do I access those parameters inside the rake task.

Like, $ rake test_rake_task[par1, par2, par3]

Answer 1

You can use args.extras to iterate over all the arguments without explicitly stating how many parameters you have.

Example:

desc "Bring it on, parameters!" task :infinite_parameters do |task, args|      puts args.extras.count     args.extras.each do |params|         puts params     end          end 

To run:

rake infinite_parameters['The','World','Is','Just','Awesome','Boomdeyada'] 

Output:

6 The World Is Just Awesome Boomdeyada 

Answer 2

Rake supports passing parameters directly to a task using an array, without using the ENV hack.

Define your task like this:

task :my_task, [:first_param, :second_param] do |t, args|   puts args[:first_param]   puts args[:second_param] end 

And call it like this:

rake my_task[Hello,World] => Hello    World 

This article by Patrick Reagan on the Viget blog explains it nicely