association failing in Rails 3.2 ActiveRecord::InverseOfAssociationNotFoundError -

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i've got buildings, apartments, residences , users reason aren't playing together. not sure i'm missing.

class building < activerecord::base   attr_accessible ...    has_many :apartments, inverse_of: :building   ... end   class apartments < activerecord::base   ...   belongs_to :building, inverse_of: :apartment   has_many :residences, inverse_of: :apartment   ... end   class residence < activerecord::base   ...   belongs_to :apartment, inverse_of: :residence   belongs_to :user, inverse_of: :residence   ... end   class user < activerecord::base ...   has_many :residences, inverse_of: :user ... end

in rails console have problems inverse associations:

a.class

=> apartment(id: integer, building_id: integer, ..., created_at: datetime, updated_at: datetime)

a.building

activerecord::inverseofassociationnotfounderror: not find inverse association building (:apartment in building) /users/[me]/.rvm/gems/ruby-1.9.3-p194@r3t2/gems/activerecord-3.2.8/lib/active_record/reflection.rb:246:in `check_validity_of_inverse!'

h.class

=> residence(id: integer, apartment_id: integer, user_id: integer..., created_at: datetime, updated_at: datetime)

h.user

activerecord::inverseofassociationnotfounderror: not find inverse association user (:residence in user) /users/[me]/.rvm/gems/ruby-1.9.3-p194@r3t2/gems/activerecord-3.2.8/lib/active_record/reflection.rb:246:in `check_validity_of_inverse!'

i go on. relationship between these classes seem getting hung on inverse. i've tried various iterations on last couple of hours calling "ma ma!" super grateful leads.

why use :inverse_of? rails determine inverse relationships case :belongs_to , :has_many declarations have names match classes.


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