Rails Tutorial Chapter 11 error "uninitialized constant User::Relationships"

Question

I have consistently been receiving the error

   uninitialized constant User::Relationships

When working through chapter 11 of the rails tutorial.

Here is the full error when I try to access the home page while logged in in my browser.

    Extracted source (around line #11):

8:          </a>
9:          <a href="<%= followers_user_path(@user) %>">
10:         <strong id="followers" class="stat">
11:             <%= @user.followers.count %>
12:         </strong>
13:         followers
14:     </a>

I have gone through the chapter multiple times and checked every line of code, but sometimes your eyes play tricks on you so here is the rest of the code

users.rb

class User < ActiveRecord::Base
attr_accessible :email, :name, :password, :password_confirmation
has_secure_password

has_many :microposts, dependent: :destroy 
has_many :relationships, foreign_key: "follower_id", dependent: :destroy
has_many :followed_users, through: :relationships, source: :followed 
has_many :reverse_relationships, foreign_key: "followed_id",
                               class_name: "Relationships",
                               dependent:   :destroy
has_many :followers, through: :reverse_relationships, source: :follower

before_save { |user| user.email = email.downcase}
before_save :create_remember_token

validates :name, presence:true, length: { maximum: 50 }

VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
validates :email, presence: true, format: { with: VALID_EMAIL_REGEX},
                uniqueness: { case_sensitive: false }
validates :password, presence: true, length: { minimum: 6}
validates :password_confirmation, presence: true

def feed
  Micropost.where("user_id =?", id)
end

def following?(other_user)
  relationships.find_by_followed_id(other_user.id)
end

def follow!(other_user)
  relationships.create!(followed_id: other_user.id)
end

def unfollow!(other_user)
  relationships.find_by_followed_id(other_user.id).destroy
end

private
  def create_remember_token
    self.remember_token = SecureRandom.urlsafe_base64
  end

end

This is the class itself

class Relationship < ActiveRecord::Base
  attr_accessible :followed_id
  belongs_to :follower, class_name: "User"
  belongs_to :followed, class_name: "User"

  validates :follower_id, presence: true
  validates :followed_id, presence: true
end

This is how it is in the tutorial... I added :follower_id back in just in case and it still didn't work.

And I also have a relationship_controller built.

class RelationshipsController < ApplicationController
before_filter :signed_in_user

def create
  @user = User.find(params[:relationship][:follower_id])
  current_user.follow!(@user)
  respond_to do |format|
    format.html { redirect_to @user }
    format.js
  end
end

def destroy
  @user = Relationship.find(params[:id]).followed
  current_user.unfollow!(@user)
  respond_to do |format|
    format.html { redirect_to @user }
    fromat.js
  end
end

end

And in routes...

 resources :users do
   member do
     get :following, :followers
   end
 end

The page where the error is happening looks like this:

<% @user ||= current_user %>
<div class = "stats">
<a href ="<%= following_user_path(@user)%>">
    <strong id="following" class="stat">
        <%= @user.followed_users.count %>
    </strong>
    following
</a>
<a href="<%= followers_user_path(@user) %>">
    <strong id="followers" class="stat">
        <%= @user.followers.count %>
    </strong>
    followers
</a>
</div>

The first part of the code before the second block works perfectly when I removed the second part. It is just the "followers" relationship is not getting set up for some reason. I played around with it in the console and it wasn't calling, whereas user.followed_users does work. I have been playing with this for four hours, have dropped the table and rebuilt it and I can't get it to work.

I tried looking on stack overflow before and found this:

Ruby error (uninitialized constant User::Relationship)

But none of the solutions there helped. Thanks for any help!

Answer 1

You've got a typo:

has_many :reverse_relationships, foreign_key: "followed_id",
                                 class_name: "Relationships",

Change the last bit to class_name: "Relationship".