名称错误：未初始化常量-- activerecord。

Question

我有两个类，Number和Freebie：

class Number < ActiveRecord::Base
  belongs_to :account
  has_many :freebies

end

class Freebie < ActiveRecord::Base
  belongs_to :number

  attr_accessible :name, :data

  has_attached_file :data, :path => "freebies/:id_partition/:filename"

  def to_s
    name
  end
end

我的其他具有has_many和belongs_to关系的类都能正常工作，但是当我调用以下内容时：

n = Number.last
n.freebies.create

I get this error:

NameError: uninitialized constant Number::Freeby
    from /Users/Robby/.rvm/gems/ruby-1.9.2-p320/gems/activerecord-3.2.8/lib/active_record/inheritance.rb:111:in `compute_type'
    from /Users/Robby/.rvm/gems/ruby-1.9.2-p320/gems/activerecord-3.2.8/lib/active_record/reflection.rb:172:in `klass'
    from /Users/Robby/.rvm/gems/ruby-1.9.2-p320/gems/activerecord-3.2.8/lib/active_record/associations/collection_association.rb:148:in `transaction'
    from /Users/Robby/.rvm/gems/ruby-1.9.2-p320/gems/activerecord-3.2.8/lib/active_record/associations/collection_association.rb:431:in `create_record'
    from /Users/Robby/.rvm/gems/ruby-1.9.2-p320/gems/activerecord-3.2.8/lib/active_record/associations/collection_association.rb:119:in `create'
    from /Users/Robby/.rvm/gems/ruby-1.9.2-p320/gems/activerecord-3.2.8/lib/active_record/associations/collection_proxy.rb:46:in `create'
    from (irb):20
    from /Users/Robby/.rvm/gems/ruby-1.9.2-p320/gems/railties-3.2.8/lib/rails/commands/console.rb:47:in `start'
    from /Users/Robby/.rvm/gems/ruby-1.9.2-p320/gems/railties-3.2.8/lib/rails/commands/console.rb:8:in `start'
    from /Users/Robby/.rvm/gems/ruby-1.9.2-p320/gems/railties-3.2.8/lib/rails/commands.rb:41:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>'

我在Freebie类上遇到了一些问题，因为它以ie结尾，而Rails试图将其单数形式变成"Freeby"而不是Freebie。但我仍然不确定为什么这不起作用。

- user1839823

Answer 1

Rails会自动从单数形式推断出一个单词的复数形式，反之亦然。您可能需要查看如何覆盖默认的变形规则。

尝试类似于这个Stackoverflow问题中的答案。

- Zajn

---

没错，就是这样！我在我的initializers/inflections.rb文件中加入了以下内容：ActiveSupport::Inflector.inflections do |inflect| inflect.irregular 'freebie', 'freebies' end现在我可以正常调用n.freebies.create了。感谢你指引我到那里！ - user1839823

Answer 2

"n.freebie.build" 

做的是你试图做的相同的事情。 如果它有效，请告诉我。

- Ketan Deshmukh