Rails 5 - 禁止的属性

Question

当我为必要的函数添加了所有属性并在正确的地方引用它时，Rails在尝试创建时抛出一个错误（据我所知）。可以成功地更新。不幸的是，它发生在多个控制器上。我假设所有控制器的问题都是一样的。

这是升级到rails 5的一部分，之前是rails 2。Ruby版本：2.6.3

创建函数。

def create
    @shipment_method = ShipmentMethod.new(shipment_methods_params)
    respond_to do |format|
      if @shipment_method.save
        format.html { redirect_to shipment_methods_url, notice: 'Shipment method was successfully created.' }
        format.json { render json: @shipment_method, status: :created, location: @shipment_method }
      else
        format.html { render action: "new" }
        format.json { render json: @shipment_method.errors, status: :unprocessable_entity }
      end
    end
  end

Params函数：

def shipment_methods_params
    params.require(:shipment_method).permit(:name, :description, :shipping_url, :active, :supports_tracking, :requires_phone)
  end

请求参数：

Request parameters  
{"utf8"=>"✓", "authenticity_token"=>"KjPFsCA5xwgeIx4U3eOH4sA1IuYY5FSw6kvK16XyyKarEzlxSi6N04LFBdsJHWyIwt+ujv6gz9D+flYBeJ+pWA==", "shipment_method"=>{"name"=>"1", "description"=>"1", "shipping_url"=>"1", "active"=>"0", "supports_tracking"=>"0", "requires_phone"=>"0"}, "commit"=>"Create Shipment method", "controller"=>"shipment_methods", "action"=>"create"}

请求的服务器日志。

Processing by ShipmentMethodsController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"KjPFsCA5xwgeIx4U3eOH4sA1IuYY5FSw6kvK16XyyKarEzlxSi6N04LFBdsJHWyIwt+ujv6gz9D+flYBeJ+pWA==", "shipment_method"=>{"name"=>"1", "description"=>"1", "shipping_url"=>"1", "active"=>"0", "supports_tracking"=>"0", "requires_phone"=>"0"}, "commit"=>"Create Shipment method"}
  User Load (0.6ms)  SELECT  `users`.* FROM `users` WHERE `users`.`id` = 5 ORDER BY `users`.`id` ASC LIMIT 1
Completed 500 Internal Server Error in 4ms (ActiveRecord: 0.6ms)



ActiveModel::ForbiddenAttributesError - ActiveModel::ForbiddenAttributesError:

全类。

class ShipmentMethod < ActiveRecord::Base
  # public :description, :active, :name, :requires_phone, :supports_tracking, :shipping_url

  ## Associations
  has_many :shipments

  ## Validations
  validates :name, presence: true, uniqueness: true

  ## Scopes
  default_scope -> {order(:name)}
  scope :active, -> {where("active = 1")}
end

Answer 1

如果有一个 load_and_authorize_resource 在你的控制器中的动作之前，发生的情况是，该方法正在接受你的参数，并试图在进入该方法之前创建一个实例，因此它忽略了你创建的强参数。因此，它忽略了你创建的强参数。

所以，当然，它永远不会到达方法，而BAM -- 可怕的是......。FAE.

有一个补救措施是调整之前的动作....

  load_and_authorize_resource :shipment_method, except: [:create]
  authorize_resource :shipment_method, only: [:create] 

但那是非常枯燥的。

另一个办法是把你的强参数方法改名为 shipment_method_params...

def shipment_method_params
    params.require(:shipment_method).permit(:name, :description, :shipping_url, :active, :supports_tracking, :requires_phone)
  end

因为，Rails和它的爱的约定。你也可以做单独的 create_params 和 update_params 如果你对这些动作有不同的参数。