ActiveRecord::Base 与 SimpleDelegator 抛出警告

Question

如何删除警告warning: delegator does not forward private method #to_ary？

以下是使用给定技术重现问题的代码片段：

• 红宝石3.2.1
• 导轨 7.0.4.3

class Foo < ActiveRecord::Base
  def name
    "foobar"
  end
end

class FooDelegator < SimpleDelegator
  def name
    "name"
  end
end

pry(main)> [FooDelegator.new(Foo.new)].flatten
(pry):12: warning: delegator does not forward private method #to_ary
=> [#<Foo:0x00007f3fa3b1ebf0 id: nil, created_at: nil, updated_at: nil>]

编辑：这个问题也发布在 Github 上，因为我认为它实际上属于 ActiveRecord (rails)。

链接： https: //github.com/rails/rails/issues/48059

Answer 1

public :to_ary在ActiveRecord类中使用将私有方法转换为公共方法：

class Foo < ActiveRecord::Base
  def name
    "foobar"
  end

  public :to_ary
end

class FooDelegator < SimpleDelegator
  def name
    "name"
  end
end