Question

我一直致力于基于forum monster demo的简单论坛。我目前正在尝试将应用程序从rails 3.0.9更新到3.2.11。当我加载应用程序时，我得到一个未定义的方法`scoped'for Forum：Module

Extracted source (around line #13):
10:         <%= link_to "Delete Category", category_path(category), :confirm => "Are you sure you want to delete this category?", :method => :delete if can? :manage, category %>
11:       </span>
12:     </div>
13:     <% if category.forums.size > 0 %>
14:     <div>
15:       <table>
16:         <tr class="smaller">

这是我的论坛模型

class Forum < ActiveRecord::Base

  # Associations
  has_many :topics, :dependent => :destroy
  has_many :posts, :through => :topics

  belongs_to :category

  # Accessors
  attr_accessible :title, :description, :state, :position, :category_id

  # Scopes
  default_scope :order => :'position ASC'

  # Validations
  validates :title,       :presence => true
  validates :description, :presence => true
  validates :category_id, :presence => true
end

以下是我在控制台中探索的经验

ricky ~/forum $ rails console   
Loading development environment (Rails 3.2.11)
irb(main):001:0> Category.all.size
  Category Load (0.4ms)  SELECT `categories`.* FROM `categories` ORDER BY position ASC
=> 2
irb(main):002:0> Category.all.each do |cat|
irb(main):003:1* puts cat.forums.size
irb(main):004:1> end
  Category Load (0.6ms)  SELECT `categories`.* FROM `categories` ORDER BY position ASC
NoMethodError: undefined method `scoped' for Forum:Module
    from /usr/lib/ruby/gems/1.9.1/gems/activerecord-3.2.11/lib/active_record/associations/association.rb:123:in `target_scope'
    from /usr/lib/ruby/gems/1.9.1/gems/activerecord-3.2.11/lib/active_record/associations/association.rb:87:in `scoped'
    from /usr/lib/ruby/gems/1.9.1/gems/activerecord-3.2.11/lib/active_record/associations/has_many_association.rb:41:in `count_records'
    from /usr/lib/ruby/gems/1.9.1/gems/activerecord-3.2.11/lib/active_record/associations/collection_association.rb:261:in `size'
    from /usr/lib/ruby/gems/1.9.1/gems/activerecord-3.2.11/lib/active_record/associations/collection_proxy.rb:46:in `size'
    from (irb):3:in `block in irb_binding'
    from (irb):2:in `each'
    from (irb):2
    from /usr/lib/ruby/gems/1.9.1/gems/railties-3.2.11/lib/rails/commands/console.rb:47:in `start'
    from /usr/lib/ruby/gems/1.9.1/gems/railties-3.2.11/lib/rails/commands/console.rb:8:in `start'
    from /usr/lib/ruby/gems/1.9.1/gems/railties-3.2.11/lib/rails/commands.rb:41:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>'
irb(main):005:0> puts Forum.all.size
NoMethodError: undefined method `all' for Forum:Module
    from (irb):5
    from /usr/lib/ruby/gems/1.9.1/gems/railties-3.2.11/lib/rails/commands/console.rb:47:in `start'
    from /usr/lib/ruby/gems/1.9.1/gems/railties-3.2.11/lib/rails/commands/console.rb:8:in `start'
    from /usr/lib/ruby/gems/1.9.1/gems/railties-3.2.11/lib/rails/commands.rb:41:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>'
irb(main):006:0>

提前感谢任何有关此问题性质的煽动。

Answer 1

您的“论坛”模型类的名称与config / application.rb中的模块完全相同

重命名您的模型或应用程序。

论坛的未定义方法`scoped'：模块

1 个答案: