Module: BrNfe::ActiveModel::HasMany::ClassMethods

Defined in:
lib/br_nfe/active_model/has_many.rb

Instance Method Summary collapse

Instance Method Details

#has_many(attr_name, class_name_str, *args) ⇒ Object

Método utilziado para definir uma associação ‘has_many’. Parâmetros para configuração: 1° - Nome do atributo 2° - Class que será utilizada para que considere apenas objetos dessa classe

Exemplo:
  class MyCustomClass
    include ::ActiveModel::Model
    include BrNfe::ActiveModel::Associations

    has_many :books, 'Book'
  end



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# File 'lib/br_nfe/active_model/has_many.rb', line 19

def has_many attr_name, class_name_str, *args
	options = {inverse_of: :reference}.merge(args.extract_options!)
	attr_accessor attr_name
	define_method attr_name do
		arry = [instance_variable_get("@#{attr_name}")].flatten.reject(&:blank?)
		arry_ok = arry.select{|v| v.is_a?(eval(class_name_str)) }
		arry.select!{|v| v.is_a?(Hash) }
		arry.map{ |hash| arry_ok.push(eval(class_name_str).new(hash)) }
		add_reference_to_has_many(arry_ok, options[:inverse_of]) if options[:inverse_of]
		instance_variable_set("@#{attr_name}", arry_ok)
		instance_variable_get("@#{attr_name}")
	end

	define_method :add_reference_to_has_many do |collection, inverse_of|
		collection.map{|obj| obj.send("#{inverse_of}=", self)}
	end
end

#validate_has_many(attr_name, *args) ⇒ Object 



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# File 'lib/br_nfe/active_model/has_many.rb', line 37

def validate_has_many attr_name, *args
	options = {
		message: "invalid_#{attr_name.to_s.singularize}".to_sym
	}.merge(args.extract_options!)
	if options[:if]
		validate "#{attr_name}_validations", if: options[:if]
	elsif options[:unless]
		validate "#{attr_name}_validations", unless: options[:unless]
	else
		validate "#{attr_name}_validations"
	end

	define_method "#{attr_name}_validations" do
		send(attr_name).each_with_index do |obj, i|
			index = if options[:index_attr] then obj.send(options[:index_attr]) else i+1 end
			send("add_#{attr_name}_errors", obj, index) if obj.invalid?
		end
	end

	define_method "add_#{attr_name}_errors" do |obj, index|
		obj.errors.full_messages.each do |message|
			errors.add(:base, options[:message], {index: index, error_message: message})
		end
	end
end