Module: ActiveHash::Associations::ActiveRecordExtensions

Defined in:
lib/associations/associations.rb

Instance Method Summary collapse

Instance Method Details

#belongs_to(*args) ⇒ Object


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# File 'lib/associations/associations.rb', line 6

def belongs_to(*args)
  our_args = args.dup
  options = our_args.extract_options!
  name = our_args.shift
  options = {:class_name => name.to_s.camelize }.merge(options)
  klass =
    begin
      options[:class_name].constantize
    rescue
      nil
    rescue LoadError
      nil
    end
  if klass && klass < ActiveHash::Base
    belongs_to_active_hash(name, options)
  else
    super
  end
end

#belongs_to_active_hash(association_id, options = {}) ⇒ Object


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# File 'lib/associations/associations.rb', line 26

def belongs_to_active_hash(association_id, options = {})
  options = {
    :class_name => association_id.to_s.camelize,
    :foreign_key => association_id.to_s.foreign_key,
    :shortcuts => []
  }.merge(options)
  # Define default primary_key with provided class_name if any
  options[:primary_key] ||= options[:class_name].constantize.primary_key
  options[:shortcuts] = [options[:shortcuts]] unless options[:shortcuts].kind_of?(Array)

  define_method(association_id) do
    options[:class_name].constantize.send("find_by_#{options[:primary_key]}", send(options[:foreign_key]))
  end

  define_method("#{association_id}=") do |new_value|
    send "#{options[:foreign_key]}=", new_value ? new_value.send(options[:primary_key]) : nil
  end

  options[:shortcuts].each do |shortcut|
    define_method("#{association_id}_#{shortcut}") do
      send(association_id).try(shortcut)
    end

    define_method("#{association_id}_#{shortcut}=") do |new_value|
      send "#{association_id}=", new_value ? options[:class_name].constantize.send("find_by_#{shortcut}", new_value) : nil
    end
  end

  if ActiveRecord::Reflection.respond_to?(:create)
    reflection = ActiveRecord::Reflection.create(
      :belongs_to,
      association_id.to_sym,
      nil,
      options,
      self
    )

    ActiveRecord::Reflection.add_reflection(
      self,
      association_id.to_sym,
      reflection
    )
  else
    method = ActiveRecord::Base.method(:create_reflection)
    if method.respond_to?(:parameters) && method.parameters.length == 5
      create_reflection(
        :belongs_to,
        association_id.to_sym,
        nil,
        options,
        self
      )
    else
      create_reflection(
        :belongs_to,
        association_id.to_sym,
        options,
        options[:class_name].constantize
      )
    end
  end
end