如何將命令行參數傳遞給rake任務我有一個rake任務，需要將一個值插入到多個數據庫中。我希望將這個值從命令行傳遞到rake任務，或者從另一個耙任務。我該怎么做？
3 回答
慕姐8265434
TA貢獻1813條經驗 獲得超2個贊
namespace :thing do
desc "it does a thing"
task :work, [:option, :foo, :bar] do |task, args|
puts "work", args end
task :another, [:option, :foo, :bar] do |task, args|
puts "another #{args}"
Rake::Task["thing:work"].invoke(args[:option], args[:foo], args[:bar])
# or splat the args
# Rake::Task["thing:work"].invoke(*args)
endendrake thing:work[1,2,3]=> work: {:option=>"1", :foo=>"2", :bar=>"3"}rake thing:another[1,2,3]=> another {:option=>"1",
:foo=>"2", :bar=>"3"}=> work: {:option=>"1", :foo=>"2", :bar=>"3"}
注：可變 task是任務對象，除非您了解/關心Rake內部組件，否則不會很有幫助。
Rails注：
如果從Rails運行任務，最好通過添加 => [:environment]這是一種設置 相依任務。
task :work, [:option, :foo, :bar] => [:environment] do |task, args| puts "work", args end
心有法竹
TA貢獻1866條經驗 獲得超5個贊
require 'rake'task :my_task, [:arg1, :arg2] do |t, args|
puts "Args were: #{args}"endtask :invoke_my_task do
Rake.application.invoke_task("my_task[1, 2]")end# or if you prefer this syntax...task :invoke_my_task_2 do
Rake::Task[:my_task].invoke(3, 4)end# a task with prerequisites passes its # arguments to it prerequisitestask :with_prerequisite,
[:arg1, :arg2] => :my_task #<- name of prerequisite task# to specify default values, # we take advantage of args being a Rake::
TaskArguments objecttask :with_defaults, :arg1, :arg2 do |t, args|
args.with_defaults(:arg1 => :default_1, :arg2 => :default_2)
puts "Args with defaults were: #{args}"end> rake my_task[1,2]
Args were: {:arg1=>"1", :arg2=>"2"}
> rake "my_task[1, 2]"
Args were: {:arg1=>"1", :arg2=>"2"}
> rake invoke_my_task
Args were: {:arg1=>"1", :arg2=>"2"}
> rake invoke_my_task_2
Args were: {:arg1=>3, :arg2=>4}
> rake with_prerequisite[5,6]
Args were: {:arg1=>"5", :arg2=>"6"}
> rake with_defaults
Args with defaults were: {:arg1=>:default_1, :arg2=>:default_2}
> rake with_defaults['x','y']
Args with defaults were: {:arg1=>"x", :arg2=>"y"}task :t1 => "dep[1,2]":invoke_my_task:invoke_my_task_2.
rake my_task\['arg1'\]
喵喵時光機
TA貢獻1846條經驗 獲得超7個贊
ENVrake
rake mytask var=foo
p ENV['var'] # => "foo"
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