CODEWITHSUNDEEP
rubyclassinheritancestatic
SystematicFrank
SystematicFrank

Reputation: 17261

Ruby static initialization inheritance

I have a class in Ruby with some static initialization like this:

class Repository
  def self.my_static_setup
    ....
  end

  my_static_setup

  ...
end

The code above works fine, and my custom static initializer gets called, the problem is whenever I inherit this class:

class PersonRepository
  ...
end

The static initialization is not inherited, and therefore not called. What am I doing wrong?

Upvotes: 0

Views: 1193

Answers (2)

Arup Rakshit
Arup Rakshit

Reputation: 118271

@megar told correctly, why the issue you are having.

As per OP's comment:

I see it is not inherited, so I am trying to find a workaround to get self.my_static_setup called whenever I define subclasses.

I can then give you the below soltuion to things get work for you. See Class#inherited for the same, which is saying Callback invoked whenever a subclass of the current class is created.

class Repository
  def self.my_static_setup
    puts 'Hello!'
  end
  def self.inherited(subclass)
    my_static_setup
  end
end


class PersonRepository < Repository
  #...
end

# >> Hello!

Upvotes: 4

user229044
user229044

Reputation: 239311

You're immediately invoking the method with my_static_setup. That part cannot be inherited, it's just code.

Upvotes: 0

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