如何将参数传递给具有 Rails 环境的 Rake 任务?

问题描述

我可以按如下方式传递参数:

desc "测试参数"任务: :hello, :user, :message do |t, args|args.with_defaults(:message => "感谢您登录")puts "你好 #{args[:user]}.#{:message}"结尾

我还可以为 Rails 应用程序加载当前环境

desc "测试环境"任务::你好=>:环境做输入你好#{User.first.name}."结尾

我想做的是能够拥有变量和环境

desc "测试环境和变量"任务::你好=>:environment, :message do |t, args|args.with_defaults(:message => "感谢您登录")把你好#{User.first.name}.#{:message}"结尾

但这不是有效的任务调用.有谁知道我如何实现这一目标?

解决方案

TLDR;

task :t, [args] =>[deps]

原答案

当您将参数传递给 rake 任务时，您可以使用 :needs 选项来要求环境.例如:

desc "测试环境和变量"任务 :hello, :message, :needs => :environment do |t, args|args.with_defaults(:message => "感谢您登录")把你好#{User.first.name}.#{args.message}"结尾

根据@Peiniau 在下面的评论更新

至于 Rails > 3.1

task :t, arg, :needs =>[deps] # 已弃用

请使用

task :t, [args] =>[deps]

I am able to pass in arguments as follows:

desc "Testing args"
task: :hello, :user, :message do |t, args|
  args.with_defaults(:message => "Thanks for logging on")
  puts "Hello #{args[:user]}. #{:message}"
end

I am also able to load the current environment for a Rails application

desc "Testing environment"
task: :hello => :environment do
  puts "Hello #{User.first.name}."
end

What I would like to do is be able to have variables and environment

desc "Testing environment and variables"
task: :hello => :environment, :message do |t, args|
  args.with_defaults(:message => "Thanks for logging on")
  puts "Hello #{User.first.name}. #{:message}"
end

But that is not a valid task call. Does anyone know how I can achieve this?

解决方案

TLDR;

task :t, [args] => [deps]

Original Answer

When you pass in arguments to rake tasks, you can require the environment using the :needs option. For example:

desc "Testing environment and variables"
task :hello, :message, :needs => :environment do |t, args|
  args.with_defaults(:message => "Thanks for logging on")
  puts "Hello #{User.first.name}. #{args.message}"
end

Updated per @Peiniau's comment below

As for Rails > 3.1

task :t, arg, :needs => [deps] # deprecated

Please use

task :t, [args] => [deps]

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