Module: SequencescapeExcel::SubclassChecker::ClassMethods

Defined in:
app/sequencescape_excel/sequencescape_excel/subclass_checker.rb

Overview

Adds a method to a superclass which can be called in each subclass to check whether it is an object of that class each class must implement the type method. The type method is not part of the module as it can be used by AR objects. The modual option allows namespacing. Example:

modual = My::Namespace
klass = My::Namespace::MySubclass1

Example:

def MyClass
 subclasses? :my_subclass_1, :my_subclass_2, :my_subclass_3
end
my_subclass_1 = MySubclass1.new
my_subclass_1.my_subclass_1? => true
my_subclass_1.my_subclass_2? => false

Instance Method Summary collapse

Instance Method Details

#subclasses?(*classes) ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'app/sequencescape_excel/sequencescape_excel/subclass_checker.rb', line 28

def subclasses?(*classes)
  options = classes.extract_options!
  classes.each do |klass|
    object_type = if options[:modual]
                    "#{options[:modual]}::#{klass.to_s.classify}"
                  else
                    klass.to_s.classify.to_s
                  end
    define_method "#{klass}?" do
      type == object_type
    end
  end
end