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