Module: ClassLevelInheritableAttributes

Included in:
PostType
Defined in:
lib/turbine-core/ext.rb

Overview

class instance vars that inherit down to children

Constant Summary collapse

PRIMITIVES = 
[NilClass, TrueClass, FalseClass, Fixnum, Float]

Instance Method Summary collapse

Instance Method Details

#cattr_inheritable(*args) ⇒ Object 



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# File 'lib/turbine-core/ext.rb', line 46

def cattr_inheritable(*args)
  @cattr_inheritable_attrs ||= [:cattr_inheritable_attrs]
  @cattr_inheritable_attrs += args
  args.each do |arg|
    class_eval %(
      class << self; attr_accessor :#{arg}; end
    )
  end
  @cattr_inheritable_attrs
end

#inherited(subclass) ⇒ Object 



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# File 'lib/turbine-core/ext.rb', line 57

def inherited(subclass)
  @all_children ||= []
  @cattr_inheritable_attrs.each do |inheritable_attribute|
    instance_var = "@#{inheritable_attribute}" 
    current_value = instance_variable_get(instance_var)
    current_value = current_value.dup unless PRIMITIVES.include?(current_value.class)
    subclass.instance_variable_set(instance_var, current_value)
  end
  @all_children << subclass
end