Question

我有两个班，编号和免费赠品：

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

我的所有其他具有has_many和belongs_to关系的类都可以正常工作，但是当我调用类似的东西时：

n = Number.last
n.freebies.create

我收到此错误：

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>'

我对Freebie类有一些其他问题，因为它以ie结尾，而Rails试图使单数版本“Freeby”而不是Freebie。不过，我不确定为什么这不起作用。

Answer 1

Rails会自动尝试从单数形式推断单词的复数版本，反之亦然。您可能希望查看覆盖默认的变形规则。

尝试与this Stackoverflow question中的答案类似的内容。

Answer 2

"n.freebie.build"

做同样的事情。如果有效，请告诉我。

NameError：未初始化的常量 - activerecord

2 个答案: