ShadowingOuterLocalVariable rubocop误差

Question

这是我的代码，这是我的错误。我认为这里不需要更多的描述：

#terminal-error    (error on  object  "= ->(object) do "

lib/form_object/base.rb:18:30: W: Lint/ShadowingOuterLocalVariable: Shadowing outer local variable - object.
        need_validation = ->(object) do

def valid?
  valid_attributes = []

  attributes.each do |attribute_name, _attributes|
    attribute_set = self.class.attribute_set[attribute_name]
    object        = self[attribute_name]

    need_validation = ->(object) do
      (object.class < FormObject::Base || attribute_set.options[:validate]) && object.respond_to?(:valid?)
    end

    if need_validation.call(object)
      valid_attributes << object.valid?
    elsif object.is_a?(Array)
      object.each do |nested|
        valid_attributes << nested.valid? if need_validation.call(nested)
      end
    end
  end
  valid_attributes << super

  valid_attributes.all?
end

Answer 1

这是来自运行的lint的警告，它检测到从外部作用域中隐藏(即隐藏)另一个局部变量的情况。

你有：

object        = self[attribute_name]

need_validation = ->(object) do
  (object.class < FormObject::Base || attribute_set.options[:validate]) && object.respond_to?(:valid?)
end

因此，第一个变量object不能在lambda中引用，因为参数也称为object。

只需重命名lambda的参数，就可以删除此警告：

need_validation = ->(obj) do
  (obj.class < FormObject::Base || attribute_set.options[:validate]) && obj.respond_to?(:valid?)
end