"有效"是DataMapper中的保留名称吗？

Question

我在datamapper中有以下模型:

class Student
  include DataMapper::Resource
  property :id,          Serial
  # <snip>
  property :permissions, String, :accessor => :protected, :required => true, :default => 'standard'
  property :valid,       Boolean, :default => false, :required => true
  # <snip>
end

在要求'dm-validations'(版本1.1.0)并启动我的Sinatra应用程序后,我收到以下消息:

/Library/Ruby/Gems/1.8/gems/dm-validations-1.1.0/lib/dm-validations.rb:81:in `valid?': wrong number of arguments (1 for 0) (ArgumentError)
    from /Library/Ruby/Gems/1.8/gems/dm-validations-1.1.0/lib/dm-validations.rb:81:in `save_self'
    from /Library/Ruby/Gems/1.8/gems/dm-core-1.1.0/lib/dm-core/resource.rb:1007:in `_save'
    from /Library/Ruby/Gems/1.8/gems/dm-core-1.1.0/lib/dm-core/resource.rb:1223:in `run_once'
    from /Library/Ruby/Gems/1.8/gems/dm-core-1.1.0/lib/dm-core/resource.rb:1006:in `_save'
    from /Library/Ruby/Gems/1.8/gems/dm-core-1.1.0/lib/dm-core/resource.rb:406:in `save'
    from /Library/Ruby/Gems/1.8/gems/dm-validations-1.1.0/lib/dm-validations.rb:69:in `save'
    from /Library/Ruby/Gems/1.8/gems/dm-validations-1.1.0/lib/dm-validations/support/context.rb:30:in `validation_context'
    from /Library/Ruby/Gems/1.8/gems/dm-validations-1.1.0/lib/dm-validations.rb:69:in `save'
<snip>

我正在为我的模型使用的"有效"名称是保留字吗？如果是,我在哪里可以找到这些单词.我接下来试着给它命名:'student_valid',但现在我真的很好奇.

谢谢

Answer 1

#有效？是dm-validations添加的方法.您不能将"valid"用作属性名称,因为它会自动定义"valid？" 布尔属性类型的方法,它覆盖dm-validations'有效？因此错误.

这是一个棘手的情况,我想我们需要改进我们验证属性名称的方式.感谢您报告此事.