ruby on rails - Could not find the source association(s) :followed in model Relationship. -

i following michael hartl's rails book , getting following error message:

activerecord::hasmanythroughsourceassociationnotfounderror: not find source association(s) :follower in model relationship. try 'has_many :following, :through => :active_relationships, :source => <name>'. 1 of ? 

when calling michael.follower (where michael user object).

here associations:

class user < activerecord::base     has_many :active_relationships, class_name:  "relationship",                                       foreign_key: "follower_id",                                       dependent:   :destroy      has_many :passive_relationships, class_name: "relationship",                                      foreign_key: "followed_id",                                      dependent: :destroy      has_many :following, :through => :active_relationships, source: :follower     has_many :followers, :through => :passive_relationships, source: :followed  end   class relationship < activerecord::base     belongs_to :follower, class_name: "user", foreign_key: "follower_id"     belongs_to :followed, class_name: "user", foregin_key: "followed_id"      validates :follower_id, presence: true     validates :followed_id, presence: true end 

if understand correctly, have many-to-many relation between user , relationship models through relationship-model (i'm sorry tautology).

i suggest change

has_many :following, :through => :active_relationships, source: :follower has_many :followers, :through => :passive_relationships, source: :followed 

to

has_many :following, :through => :active_relationships, class_name: "user" has_many :followers, :through => :passive_relationships, class_name: "user"