我陷入了一个不可能那么复杂的问题,但我只是没有把事情做好。
假设我有两个模型:
class Notification < ActiveRecord::Base
belongs_to :device
validates :number, presence: true
end
and
class Device < ActiveRecord::Base
belongs_to :user
has_many :notifications, :dependent => :destroy
//rest omitted for brevity
end
像这样的嵌套路由:
resources :devices do
resources :notifications
end
和一个通知控制器,如下所示:
class NotificationsController < ApplicationController
before_filter :authenticate_user!
before_action :set_device, :only => [:index, :new, :create]
before_filter :load_notification, only: :create
load_and_authorize_resource :device
load_and_authorize_resource :notification, :through => :device
def index
end
def new
@notification = @device.notifications.build
end
def create
params.each do |param|
logger.debug param
end
@notification = @device.notifications.build(notification_params)
if @notification.save
redirect_to [@notification.device, @notifications], notice: 'Notification was successfully created.'
else
render action: 'new'
end
end
private
def load_notification
@notification = Notification.new(notification_params)
end
def set_device
@device = Device.find(params[:device_id])
end
def notification_params
params.fetch(:notification, {}).permit(:number, :device_id, :message)
end
end
现在说到创建通知:
该表格按预期工作。但是:我想实现第二个目标。
通知应该是可重新发送的,所以我在通知索引视图中有这个:
<%= link_to 'Resend', device_notifications_path(number: notification.number, message: notification.message), :method => :post %>
但验证失败,我重定向到新页面,没有任何预填充字段告诉我该数字是必需的,因此肯定缺少一些我不明白的明显内容。
请求中的参数:
[["user_id", xyz]]
["_method", "post"]
["authenticity_token", "myauthenticitytokenstring"]
["number", "+1555123456789"]
["action", "create"]
["controller", "notifications"]
["device_id", "9"]
["notification", {}]
(留言非必填)
我认为错误出在控制器中的 notification_params 方法中。
有人可以帮我吗?