控制器方法#show 被调用 [英] Controller method #show getting called

问题描述

我的 #index 视图中有一个链接:

I have a link on my #index view:

<%= link_to 'Export Calendar (ICS)', { controller: :tickets, action: :ics_export, format: :ics }, class: "class-needed right" %>

routes.rb 与此相关:

resources :tickets
get 'tickets/calendar' => 'tickets#ics_export'
post 'tickets' => 'tickets#index'
patch 'tickets/:id/close' => 'tickets#close', as: 'close_ticket'
post 'tickets/:id' => 'ticket_comments#create'

我的 TicketsController 属于:

before_action :set_ticket, only: [:show, :edit, :destroy, :update, :close]

def show
  @ticket_comment = TicketComment.new
end

def ics_export
  tickets = Ticket.all
  respond_to do |format|
    format.html
    format.ics do
      cal = Icalendar::Calendar.new
      tickets.each do |ticket|
        event = Icalendar::Event.new
        event.dtstart = ticket.start
        event.description = ticket.summary
        cal.add_event(event)
      end
      cal.publish
      render :text =>  cal.to_ical
    end
  end
end

private
def set_ticket
  @ticket = Ticket.find(params[:id])
end

当我单击该链接时，它会将我带到 /tickets/calendar.ics，这是正确的，但出现以下错误:

And when I click the link, it takes me to /tickets/calendar.ics which is correct but I get the following error:

ActiveRecord::RecordNotFound in TicketsController#show

找不到'id'=calendar

提取的源代码(围绕第 83 行):

 private
 def set_ticket
   @ticket = Ticket.find(params[:id])
 end

@ticket = Ticket.find(params[:id]) 突出显示.这是有道理的，它无法调用具有 calendar id 的票证.

The @ticket = Ticket.find(params[:id]) is highlighted. Which make sense that it is failing to call a ticket with an id of calendar.

请求有参数:

{"id"=>"日历","格式"=>"ics"}

我该如何解决这个错误?为什么要调用 show 动作?

How do I fix this error? Why is it calling the show action?

推荐答案

在规范的 Rails 中有一个脚注从外到内的路由到效果:

Rails 路由按照它们指定的顺序进行匹配，因此如果您在 get 'photos/poll' 上方有一个 resources :photos，则资源行的 show action 路由将在 get 行之前匹配.要解决此问题，请将 get 行移动到资源行上方，使其首先匹配.

Rails routes are matched in the order they are specified, so if you have a resources :photos above a get 'photos/poll' the show action's route for the resources line will be matched before the get line. To fix this, move the get line above the resources line so that it is matched first.

正如所评论的，修复方法是指定 get 'tickets/calendar' =>... 在 resources :tickets 之前.如果路线顺序有问题，您可以运行 rake routes，据我所知，它应该按照检查的顺序呈现您的路线.

As commented, the fix is to specify get 'tickets/calendar' => ... ahead of resources :tickets. If the order of routes is in question, you can run rake routes, which, to the best of my knowledge, should render your routes in the order they are checked.

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