ruby on rails - How to pass different arguments in rake multitask -

i want pass different arguments every method , need run methods parallel using rake task

here rake task calling example

rake::task['test:sync'].invoke(user.id, user.address) rake::task['test:sync'].invoke(user.id, user.address) rake::task['test:sync'].invoke(user.id, user.address) 

i have seen multitask example

multitask :copy_files => [:copy_src, :copy_doc, :copy_bin]     puts "all copies complete" end 

here calling task name alone. in case want pass task name parameters . how can achieve it.

extract functionality own method (foo) , dynamically declare rake tasks arguments (arg1,arg2) baked task name itself. declare multitask , invoke it. calls foo run in parallel.

def foo(arg1, arg2)   thread_id = thread.current.object_id.to_s[-4..-1]   10.times |i|     sleep rand     puts "[#{thread_id}] (#{arg1}) (#{arg2}) (#{i})"   end end  task :parallel_foos   arg1s = (1..4).map { sprintf('%.4f', rand) }   arg2s = %w{red green blue yellow}   arg_pairs = arg1s.zip(arg2s)   # dynamically declare unique rake tasks   arg_pairs.each |arg_pair|     task arg_pair.to_s       foo(*arg_pair)     end   end   multitask :_parallel_foos => arg_pairs.map(&:to_s)   rake::multitask[:_parallel_foos].invoke end  >> rake parallel_foos [2460] (0.4510) (blue) (0) [4820] (0.5997) (yellow) (0) [4820] (0.5997) (yellow) (1) [2980] (0.3482) (red) (0) [2980] (0.3482) (red) (1) [2100] (0.2251) (green) (0) [2980] (0.3482) (red) (2) [4820] (0.5997) (yellow) (2) [2460] (0.4510) (blue) (1) [2980] (0.3482) (red) (3) [4820] (0.5997) (yellow) (3) [2100] (0.2251) (green) (1) [2980] (0.3482) (red) (4) [2100] (0.2251) (green) (2) [2460] (0.4510) (blue) (2) [2100] (0.2251) (green) (3) [4820] (0.5997) (yellow) (4) [2460] (0.4510) (blue) (3) [2980] (0.3482) (red) (5) [4820] (0.5997) (yellow) (5) [2460] (0.4510) (blue) (4) [2980] (0.3482) (red) (6) [2100] (0.2251) (green) (4) [2460] (0.4510) (blue) (5) [4820] (0.5997) (yellow) (6) [2100] (0.2251) (green) (5) [2980] (0.3482) (red) (7) [2460] (0.4510) (blue) (6) [4820] (0.5997) (yellow) (7) [2980] (0.3482) (red) (8) [2100] (0.2251) (green) (6) [4820] (0.5997) (yellow) (8) [2460] (0.4510) (blue) (7) [2100] (0.2251) (green) (7) [2980] (0.3482) (red) (9) [2460] (0.4510) (blue) (8) [4820] (0.5997) (yellow) (9) [2460] (0.4510) (blue) (9) [2100] (0.2251) (green) (8) [2100] (0.2251) (green) (9)