Ruby on rails 3.2 ActionView:：Template:：Error（参数数目错误（4..5为6））与rails、active admin和simple form

我有一个带有rails4、activeadmin和simpleform的应用程序。我已经更改了我的simple_form.rb配置。从那时起，当我访问localhost:3000/admin/login时，我得到：

ActionView::Template::Error (wrong number of arguments (6 for 4..5)):
    5:   <%= active_admin_form_for(resource, :as => resource_name, :url => send(:"#{scope}_session_path"), :html => { :id => "session_new" }) do |f|
    6:     f.inputs do
    7:       resource.class.authentication_keys.each { |key| f.input key, :input_html => {:autofocus => true}}
    8:       f.input :password
    9:       f.input :remember_me, :label => t('active_admin.devise.login.remember_me'), :as => :boolean, :if =>  false  #devise_mapping.rememberable? }
    10:     end
    11:     f.actions do
  simple_form (2.1.0) lib/simple_form/inputs/base.rb:50:in `initialize'
  formtastic (2.2.1) lib/formtastic/helpers/input_helper.rb:240:in `new'
  formtastic (2.2.1) lib/formtastic/helpers/input_helper.rb:240:in `input'
...

导致错误的原因是什么？

在这个线程上：，SpecialCyCi有一个解决问题的方法

在config/initializers/simple_form.rb的顶部，放置以下内容：

inputs = %w[
  CollectionSelectInput
  DateTimeInput
  FileInput
  GroupedCollectionSelectInput
  NumericInput
  PasswordInput
  RangeInput
  StringInput
  TextInput
]

inputs.each do |input_type|
  superclass = "SimpleForm::Inputs::#{input_type}"
  hack = %|
    module SimpleForm
      module Inputs
        class #{superclass}
          def input_html_classes
            super.push('form-control')
          end
        end
      end
    end
  |
  eval(hack)

end

SimpleForm.setup do |config|
  # your config here...
  # ...
end

inputs = %w[
  CollectionSelectInput
  DateTimeInput
  FileInput
  GroupedCollectionSelectInput
  NumericInput
  PasswordInput
  RangeInput
  StringInput
  TextInput
]

inputs.each do |input_type|
  superclass = "SimpleForm::Inputs::#{input_type}"
  hack = %|
    module SimpleForm
      module Inputs
        class #{superclass}
          def input_html_classes
            super.push('form-control')
          end
        end
      end
    end
  |
  eval(hack)

end

SimpleForm.setup do |config|
  # your config here...
  # ...
end