How to define a method to call from a configure block of a sinatra modular application?

Question

I have a Sinatra application that, when cooked, 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 does not work. I get an undefined method read_config_file for MyApp:Class (NoMethodError)

The logic in read_config_file non-trivial, so I don't want to duplicate it in both. How can I determine a method that can be called from both of my configuration blocks? Or am I just completely approaching this problem?

Answer 1

It seems that the configure block executes when reading the file. You just need to transfer 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 

Answer 2

Your configuration blocks are triggered by class evaluation. So context is the class itself, not the instance. So, you need a class method, not an instance method.

 def self.read_config_file 

That should work. Not tested .;)