Rails: Activerecord::Hasmanythroughsourceassociationnotfounderror: Could Not Find the Source Association(S)

Could not find the source association(s) :followed_id in model relationship in Rails 3.2

Found the error:
In my user model I had to change

  has_many :followed_users, through: :relationships, source: "followed_id"  

to

  has_many :followed_users, through: :relationships, source: :followed  

Seems to be a typo in Hartl's tutorial Listing 11.10 http://ruby.railstutorial.org/book/ruby-on-rails-tutorial#code:has_many_following_through_relationships, since that's where I got the "source: "followed_id"" code from.

I got the fixed code from Hartl's github "sample app".

Could not find the source association(s) :character in model Relation

OK, I think the problem is with naming. It's not a good idea naming association and column with same name. If it's possible start with renaming columns on relation:

owner     => owner_id
character => character_id

Alternatively You can rename associations:

owner     => user_owner
character => user_character

Another thing that I see is Your separate characters table. You seem like want to reference characters table from Your Relation model (correct me if I am wrong), but never do it.

belongs_to :user_character, foreign_key: "character"

Now to Your main question. If I understood Your correctly You want to get list of characters, using friends association defined in User. In this case the line should look like this:

has_many :friends, -> { where reltype: "friend" }, through: :relations, source: "user_character", class_name: "Character"

UPDATED

Author explained that he really wants to reference User model through friends association.

# relation.rb
belongs_to :user_character, foreign_key: "character", class_name: "User"

# user.rb
has_many :friends, -> { where reltype: "friend" }, through: :relations, source: "user_character"

UPDATE2

There was a problem with association condition, in particular case You need to specify table explicitly:

has_many :friends, -> { where("relations.reltype" => "friend") }, through: :relations, source: "user_character"

Rails 4 Error: ActiveRecord::HasManyThroughSourceAssociationNotFoundError

Here is my suggestion:

user.rb

userfavorites - will list all user you have favorited

has_many :favorite_relationships, class_name: "FavoriteUser", foreign_key: "c_user_id"
has_many :userfavorites, through: :favorite_relationships, source: :user

userfavorited_by - will list all user who favorited you

has_many :favorited_relationships, class_name: "FavoriteUser", foreign_key: "user_id"
has_many :userfavorited_by, through: :favorited_relationships, source: :c_user

FavoriteUser

edited:

class FavoriteUser < ActiveRecord::Base
    belongs_to :c_user, class_name: "User"
    belongs_to :user, class_name: "User"
end

After you make changes, make sure to test first in your console that the relationships works. then make appropriate change in your view, controller etc...

ActiveRecord::HasManyThroughAssociationNotFoundError

Add this to User class

has_many :collected_posts, through: :collections, source: :posts

Rails Tutorial 11.1 - ActiveRecord::HasManyThroughSourceAssociationNotFoundError:

You should use

has_many :followed_users, through: :relationships, source: :followed

The is because source wants the name of the association that the records are loaded from (not the foreign key)

Rails Model Association: Favoriting

You have

has_many :favorites, :through => :favorite_projects

But there is no favorites association in FavoriteProject model. Only belongs_to :project. It should be:

has_many :favorites, :through => :favorite_projects, :source => :project

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