`send(:format)` on relation's model instance call Kernel#format and not field's read method after parent is reloaded

class Test1

  include Mongoid::Document  has_one :test2, class_name: "Test2"

end

class Test2

  include Mongoid::Document  belongs_to :test1, class_name: "Test1"  field :format, type: Symbol

end

t1=Test1.create

t2=Test2.create(test1: t1, format: :html)

t2.format # => :html

t2.send(:format) # => :html

t1.reload

t1.test2.format # => :html

t1.test2.send(:format)

# =>

# ArgumentError: too few arguments

# from (pry):18:in `format'