Ruby on Rails NameError

Question

我正在为关注用户制作一款新应用，但我遇到了一些麻烦。这是我的错误：

NameError in Welcome#sucess
Showing ../welcome/sucess.html.erb where line #13 raised:
uninitialized constant User::FollowingRelation
Extracted source (around line #13):

10: <br />
11: Following
12: <ul>
13:   <% @user.following.each do |u| %>
14:     <li><%= link_to u.username, u %></li>
15:   <% end %>
16: </ul>

我可以在我的代码中找到User :: FollowingRelation：

*我的用户模型

class User < ActiveRecord::Base

  attr_accessible :pass, :username
  # Who am I following?
  has_many :following_relations, :foreign_key => :follower_id
  has_many :following, :through => :following_relations 
  # Who am I followed by?
  has_many :follower_relations, :class_name => "Relation", :foreign_key => :following_id
  has_many :followers, :through => :follower_relations

  validates :username, :pass, :presence => true
  validates :username, :pass, :length => { :minimum => 4 }
  validates :username, :uniqueness => true


    def self.login(username,pass)
    user = find_by_username(username) and user = find_by_pass(pass)   
    if user.nil?
      return nil
    else
      return user
    end
    end
end

*相关模型

class Relation < ActiveRecord::Base
  belongs_to :follower, :class_name => "User"
  belongs_to :following, :class_name => "User"
end

*行动成功

def sucess
   @user = User.find(params[:id])
   @relation = Relation.new
 end

我是Ruby on Rails的新手，所以请帮助我:)。

Answer 1

您需要修改此行：

has_many :following_relations, :foreign_key => :follower_id

要：

has_many :following_relations, class_name: 'Relation', :foreign_key => :follower_id