CODEWITHSUNDEEP
ruby
BobRodes
BobRodes

Reputation: 6165

Ruby: get a reference in a method context to the object that self is an attribute of

Suppose I have a setup like this:

class Foo
  attr_accessor :bar

  def initialize
    @bar = Bar.new
  end
end

class Bar
  def bar_method
    self.class # => Bar
    whatever???.class # => Foo
  end
end

foo = Foo.new
foo.bar.bar_method

I know that I can set up the method like this:

def bar_method(selfs_self)
  selfs_self.class # => Foo
end

And call the method like this: foo.bar.bar_method(foo) to get what I want. But that seems pretty redundant. Is there any way, inside of bar_method, that I can get a reference to foo, without specifically passing in a reference to it?

Upvotes: 2

Views: 268

Answers (1)

Kimmo Lehto
Kimmo Lehto

Reputation: 6041

No.

Usually this is done by passing a reference to the parent object when initializing child objects, like:

class Foo
  attr_accessor :bar

  def initialize
    @bar = Bar.new(self)
  end
end

class Bar
  attr_reader :foo

  def initialize(foo)
    @foo = foo
  end

  def bar_method
    self.class # => Bar
    foo.class # => Foo
  end
end

Upvotes: 3

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