Ruby on rails 在运行时删除验证

下面我可以在运行时将验证成功添加到Mongoid：

class Abc
  include Mongoid::Document
  field :something, type: String
end

 a = Abc.new
a.valid?
 => true 

Abc.class_eval do
  validates_presence_of :something
end
 => [Mongoid::Validatable::PresenceValidator] 
 b = Abc.new
=> #<Abc _id: 55948e466d616344a4010000, something: nil> 
b.valid?
 => false 

---

我想你会在这篇博文中找到你想要的：

基本上，验证器信息在类变量

\u validators

中，您可以调用

skip\u callback

来取消它。
因此，您应该能够用

validators = Abc._validators[:something] 
v = validators.first
validators.delete v
filter = Abc._validate_callbacks.find { |c| c.raw_filter == v }.filter
skip_callback :validate, filter

validators = Abc._validators[:something] 
v = validators.first
validators.delete v
filter = Abc._validate_callbacks.find { |c| c.raw_filter == v }.filter
skip_callback :validate, filter