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我有一個自定義控制器操作,如下所示。我有一個帶有複選框的表單,它允許我通過使用Prawn將它們寫入到pdf文件中來打印選定的項目。有任何想法嗎?Rails 3.2控制器操作中的DoubleRenderError
我收到以下錯誤消息。
AbstractController::DoubleRenderError (Render and/or redirect were called multiple
times in this action. Please note that you may only call render OR redirect, and
at most once per action.
這裏是控制器的相關部分
class ShipmentsController < ApplicationController
autocomplete :client, :name, :full => true
autocomplete :product, :product_name, :full => true, :extra_data => [:product_code, :miller_product_code]
respond_to :js, :html
def index
if params[:status]
@openshipments = Shipment.where(:status => params[:status]).search(params[:search1]).order(sort_column + " " + sort_direction).page(params[:page])
else
@shipments = Shipment.search(params[:search]).order(sort_column + " " + sort_direction).page(params[:page])
end
end
def create
...
end
def edit
...
end
def update
...
end
def destroy
...
end
def print_open
@printshipments = Shipment.find(params[:open_shipment_ids])
respond_to do |format|
format.pdf do
@printshipments.each do |shipment|
pdf = Prawn::Document.new
pdf.text "bill_of_lading_#{shipment.bill_of_lading}"
#removed send_data pdf.render, filename: "bill_of_lading_#{shipment.bill_of_lading}"
File.open("public/bill_of_ladings/bill_of_lading_#{shipment.bill_of_lading}.pdf", "wb") { |f| f << pdf.render }
shipment.update_attribute(:status, "PRINTED")
end
end
end
redirect_to shipments_path
end
編輯: 我可以通過刪除SEND_DATA線擺脫錯誤的,但我不能得到重定向到形式我想要的頁面。它只想要在目錄中呈現javacript,可能是因爲這是一個遠程表單。我通過使用以下路由的form_tag調用print_open。
get '/shipments/status/:status' => 'shipments#index'
當我使用redirect_to的shipments_path我print_open方法結束時,它呈現視圖,但在瀏覽器的URL仍讀作:
http://localhost:3000/shipments/status/open
代替:
http://localhost:3000/shipments
那麼如何獲得所需的輸出?我需要send_data嗎? – ctilley79
你想要的輸出是什麼?一個帶有項目列表的PDF文件? – robbrit
我希望的輸出是將pdf寫入「public/bill_of_ladings」目錄,然後刷新視圖。到目前爲止,它將在循環中編寫第一個pdf。 – ctilley79