Try to change : from class Place < ActiveRecord::Base acts_as_tree :order => "name" has_many :photo
to class Place < ActiveRecord::Base acts_as_tree :order => "name" has_many :photos #<------ may be help you p.s. sorry for my english
Try to change : from class Place < ActiveRecord::Base acts_as_tree :order => "name" has_many :photo
to class Place < ActiveRecord::Base acts_as_tree :order => "name" has_many :photos #<------ may be help you p.s. sorry for my english