method

remove_class

Ruby on Rails latest stable (v6.1.7.7) - 0 notes - Class: Class

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What's this?

Method deprecated or moved

This method is deprecated or moved on the latest stable version. The last existing version (v2.3.8) is shown here.

remove_class(*klasses) public

Removes the classes in klasses from their parent module.

Ordinary classes belong to some module via a constant. This method computes that constant name from the class name and removes it from the module it belongs to.

  Object.remove_class(Integer) # => [Integer]
  Integer                      # => NameError: uninitialized constant Integer

Take into account that in general the class object could be still stored somewhere else.

  i = Integer                  # => Integer
  Object.remove_class(Integer) # => [Integer]
  Integer                      # => NameError: uninitialized constant Integer
  i.subclasses                 # => ["Bignum", "Fixnum"]
  Fixnum.superclass            # => Integer

Show source

# File activesupport/lib/active_support/core_ext/class/removal.rb, line 36
  def remove_class(*klasses)
    klasses.flatten.each do |klass|
      # Skip this class if there is nothing bound to this name
      next unless defined?(klass.name)
      
      basename = klass.to_s.split("::").last
      parent = klass.parent
      
      # Skip this class if it does not match the current one bound to this name
      next unless parent.const_defined?(basename) && klass = parent.const_get(basename)

      parent.instance_eval { remove_const basename } unless parent == klass
    end
  end

remove_class

Related methods

Method deprecated or moved

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