I have a Sinatra app that, boiled down, looks basically like this:

class MyApp < Sinatra::Base

  configure :production do
    myConfigVar = read_config_file()
  end

  configure :development do
    myConfigVar = read_config_file()
  end

  def read_config_file()
    # interpret a config file
  end

end

Unfortunately, this doesn't work. I get undefined method read_config_file for MyApp:Class (NoMethodError)

The logic in read_config_file is non-trivial, so I don't want to duplicate in both. How can I define a method that can be called from both my configuration blocks? Or am I just approaching this problem in entirely the wrong way?

• ruby
• sinatra

It seems the configure block is executed as the file is read. You simply need to move the definition of your method before the configure block, and convert it to a class method:

class MyApp < Sinatra::Base

  def self.read_config_file()
    # interpret a config file
  end

  configure :production do
    myConfigVar = self.read_config_file()
  end

  configure :development do
    myConfigVar = self.read_config_file()
  end

end

Your configure blocks are run when the class definition is evaluated. So, the context is the class itself, not an instance. So, you need a class method, not an instance method.

def self.read_config_file

That should work. Haven't tested though. ;)