Module: OpenStax::Accounts::HasManyThroughGroups::ActiveRecord::ClassMethods

Defined in:
lib/openstax/accounts/has_many_through_groups.rb

Instance Method Summary collapse

Instance Method Details

#has_many_through_groups(groups_name, name, options = {}) ⇒ Object



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# File 'lib/openstax/accounts/has_many_through_groups.rb', line 10

def has_many_through_groups(groups_name, name, options = {})
  options = {class_name: name.to_s.classify}.merge(options)
  association_name = "direct_#{name.to_s}".to_sym

  OpenStax::Accounts::Group.class_exec do
    has_many association_name, options

    define_method(name) do
      OpenStax::Accounts::Group.includes(association_name)
        .where(openstax_uid: supertree_group_ids)
        .collect{|g| g.send(association_name).to_a}.flatten.uniq
    end
  end

  class_exec do
    has_many association_name, options if options[:as]

    define_method(name) do
      direct_records = respond_to?(association_name) ? \
                         send(association_name).to_a : []
      indirect_records = OpenStax::Accounts::Group
        .includes(association_name).where(
          openstax_uid: send(groups_name).collect{|g|
            g.supertree_group_ids
          }.flatten.uniq
        )
        .collect{|g| g.send(association_name).to_a}
      (direct_records + indirect_records).flatten.uniq
    end
  end
end