Module: EagerRecord::ScopedPreloading::HasManyAssociationExtensions

Defined in:
lib/eager_record/scoped_preloading.rb

Instance Method Summary collapse

Instance Method Details

#find_using_scoped_preload(originating_collection, *args) ⇒ Object 



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# File 'lib/eager_record/scoped_preloading.rb', line 59

def find_using_scoped_preload(originating_collection, *args)
  options = args.extract_options!
  reflection_name = @reflection.name
  current_scope = 
    if current_scoped_methods && current_scoped_methods[:find] #XXX regression test
      @reflection.options.merge(current_scoped_methods[:find])
    else
      @reflection.options
    end
  owner_class = @owner.class
  reflection_class = @reflection.klass
  scope_key = current_scope.inspect
  if preloaded_association = @owner.__send__(:scoped_preloaded_associations_for, reflection_name)[scope_key]
    return preloaded_association
  end
  reflection = owner_class.__send__(
    :create_has_many_reflection,
    TEMPORARY_SCOPED_PRELOAD_ASSOCIATION,
    current_scope.merge(
      :class_name => reflection_class.name,
      :readonly => true
  )
  )
  originating_collection.each do |record|
    association = ActiveRecord::Associations::HasManyAssociation.new(record, reflection)
    record.__send__(:association_instance_set, TEMPORARY_SCOPED_PRELOAD_ASSOCIATION, association)
  end
  owner_class.__send__(:preload_has_many_association, originating_collection, reflection)
  originating_collection.each do |record|
    record.instance_eval do
      @scoped_preloaded_associations ||= Hash.new { |h, k| h[k] = {} }
      @scoped_preloaded_associations[reflection_name][scope_key] =
        association_instance_get(TEMPORARY_SCOPED_PRELOAD_ASSOCIATION)
      association_instance_set(TEMPORARY_SCOPED_PRELOAD_ASSOCIATION, nil)
    end
  end
  @owner.__send__(:scoped_preloaded_associations_for, reflection_name)[scope_key]
end