Module: DemetersRevenge::HasManyExtensions

Included in:
ActiveRecord::Base
Defined in:
lib/demeters_revenge/has_many_extensions.rb

Class Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/demeters_revenge/has_many_extensions.rb', line 4

def self.included(base)
  base.instance_eval do
    class << self
      
      def has_many_with_transmogrifiers(name, *args)
        has_many_without_transmogrifiers(name, *args)
        HasManyExtensions.inject_transmogrifiers(self, name)
      end
    
      alias_method_chain(:has_many, :transmogrifiers)
      
    end
  end
end

.inject_transmogrifiers(klass, association_name) ⇒ Object 



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# File 'lib/demeters_revenge/has_many_extensions.rb', line 19

def self.inject_transmogrifiers(klass, association_name)
  plural_association_name = association_name.to_s
  singular_association_name = plural_association_name.singularize
  
  klass.instance_eval do 
            
    define_method("build_#{singular_association_name}") do |*args|
      send(plural_association_name).build(*args)
    end
    
    define_method("create_#{singular_association_name}") do |*args|
      send(plural_association_name).create(*args)
    end
    
    define_method("delete_#{singular_association_name}") do |object|
      send(plural_association_name).delete(object)
    end
    
    define_method("clear_#{plural_association_name}") do
      send(plural_association_name).clear
    end
    
    define_method("number_of_#{plural_association_name}") do
      send(plural_association_name).length
    end
    
    define_method("#{singular_association_name}_count") do |*args|
      send(plural_association_name).count(*args)
    end
    
    define_method("has_#{plural_association_name}?") do
      send(plural_association_name).any?
    end
    
    define_method("has_no_#{plural_association_name}?") do
      send(plural_association_name).empty?
    end
    
    define_method("find_#{plural_association_name}") do |*args|
      send(plural_association_name).find(*args)
    end
  end
end