Module: ClassX::ClassAttributes

Defined in:
lib/classx/class_attributes.rb

Overview

for easy defining inheritable class accessor using classx attribute interface.

require 'classx'
class YourClass
  extend ClassX::ClassAttributes

  class_has :table_name, :writable => true, :default => proc {|klass| klass.to_s.downcase }
end

YourClass.table_name #=> 'yourclass'
YourClass.table_name = 'test'
YourClass.table_name #=> 'test'

class SubClass < YourClass
end

SubClass.table_name #=> 'subclass' # it's not "test"!!

# you can also write following:
SubClass.table_name('test2')
SubClass.table_name #=> 'test2'

SEE ALSO

dsl_accessor:
  It's have also similar functions. It's implemented simply using activesupport's inheritable_accessor.
  classx is complex but more extensible to define class attribute.

Constant Summary collapse

CLASS_ATTRIBUTE_REGEX = 
/\Aclass_attribute_of:(\w+)\z/

Instance Method Summary collapse

Instance Method Details

#class_attribute_of ⇒ Object 



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# File 'lib/classx/class_attributes.rb', line 36

def class_attribute_of
  unless instance_variable_defined?('@__class_attribute_of') && @__class_attribute_of
    @__class_attribute_of = {}
    private_methods.select {|meth| meth.to_s =~ CLASS_ATTRIBUTE_REGEX }.each do |meth|
      key = meth.to_s.sub(CLASS_ATTRIBUTE_REGEX) { $1 }
      @__class_attribute_of[key] = __send__("class_attribute_of:#{key}").new(self)
    end
  end

  @__class_attribute_of
end