启动 Rails 控制台时如何自动运行代码? [英] How to run code automatically when launching a Rails console?

问题描述

假设每次 Rails 控制台出现时我都想打个招呼:

Let's say I wanted a greeting every time the Rails console comes up:

Scotts-MBP-4:ucode scott$ rails c
Loading development environment (Rails 4.2.1)
Hello there! I'm a custom greeting
2.1.5 :001 >

我该把 放在哪里，你好！我是自定义问候语' 声明?

建议了另一个 Stackoverflow 答案，我也在别处读过这个，我可以把它放在这样的初始化程序中:

Another Stackoverflow answer suggested, and I've read this elsewhere too, that I can put that in an initializer like this:

# config/initializers/console_greeting.rb
if defined?(Rails::Console)
  puts 'Hello there! I\'m a custom greeting'
end

虽然这对我不起作用:(.即使没有 if 定义?(Rails::Console) 我仍然没有得到输出.似乎当我输入时没有运行初始化程序控制台，尽管其他人建议.

That doesn't work for me though :(. Even without the if defined?(Rails::Console) I still don't get output. Seems like initializers are not run when I enter a console, despite what others suggest.

推荐答案

我将 ~/.irbrc 用于类似目的(我在每个控制台会话中都需要一个 gem).例如，我的 .irbrc

I use ~/.irbrc for similar purposes (I require a gem in each console session). For example, my .irbrc

if (defined? Rails)
  # Rails specific
end

# common for all irb sessions

您可以使用您的项目名称将执行代码限制在一个项目的控制台:

You could use your project name to limit executing code to only one project's console:

if (defined? Rails) && (defined? YourProject)
  # code goes here
end

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