ruby-on-rails - 如果不是 rails 运行它，则跳过初始化程序

Question

我在初始化程序中有一些代码，我希望它仅在服务器启动时运行，而不是在控制台启动时运行。有什么办法可以区分它们吗？

谢谢!

Answer 1

我有这个任务的特殊 helper

#lib/initializer_helpers.rb
module InitializerHelpers

  def self.skip_console_rake_generators &block
    skip(defined?(Rails::Console) || defined?(Rails::Generators) || File.basename($0) == "rake", &block)
  end

  def self.skip_rake_generators &block
    skip(defined?(Rails::Generators) || File.basename($0) == "rake", &block)
  end

  def self.skip_generators &block
    skip(defined?(Rails::Generators), &block)
  end

  def self.skip_console &block
    skip(defined?(Rails::Console), &block)
  end

  private

  def self.skip(condition, &block)
    raise ArgumentError.new("no block given") if block.blank?
    unless condition
      yield
    end
  end

end

# use it
InitializerHelpers.skip_console do
  # not executed in console
end

更新:将这个想法提取到 gem https://github.com/olegantonyan/initializer_helpers