Question

我试图在我的应用中为上传的pdf文件实现下载功能。由于某种原因无法找到记录？如果我检查GET请求，我看到它尝试使用url结尾＆＃34; /resumes/download.5"。 5是来自存储文件的记录id。 我缺少什么？如何在将来调试此类问题？由于某种原因，Byebug这次没有工作。

视图/恢复/ show.html.erb

<%= link_to "Download", resume_download_path(@resume) %>

resumes_controller.rb

class ResumesController < ApplicationController
  around_filter :catch_not_found
  before_action :find_resume, only: [ :show, :edit, :update, :destroy, :download ]
  before_action :authenticate_user!

  def show
  end

  def new
    if @resume = current_user.resume
      redirect_to @resume
    else
      @resume = Resume.new
    end
  end

  def create
    @resume = current_user.build_resume(resume_params)
    if @resume.save
      redirect_to @resume
    else
      render :new
    end
  end

  def edit
  end

  def update
    if @resume.update resume_params
      redirect_to @resume, notice: "Your resume was successfully saved!"
    else
      render 'edit'
    end
  end

  def destroy
    @resume.destroy
    redirect_to new_resume_path, notice: "Your resume was successfully deleted!"
  end

  def download
    send_data @resume, type: "application/pdf", disposition: "attachment"
  end

  private

  def resume_params
    params.require(:resume).permit( :user_id, :download_file, :remove_download_file)
  end

  def find_resume
    @resume = Resume.find(params[:id])
  end

  def catch_not_found
    yield
    rescue ActiveRecord::RecordNotFound
    redirect_to(root_url, :notice => 'Record not found')
  end

end

的routes.rb

Rails.application.routes.draw do

  devise_for :users
  root 'welcomes#index'
  resources :resumes

  get "resumes/download", as: "resume_download"

  get '*path' => redirect('/')
end

点击下载链接时

Started GET "/resumes/download.5" for 77.8.13.5 at 2017-08-23 21:22:14 +0000
Cannot render console from 77.8.13.5! Allowed networks: 127.0.0.1, ::1, 127.0.0.0/127.255.255.255
Processing by ResumesController#show as 
  Parameters: {"id"=>"download"}
  Resume Load (0.2ms)  SELECT  "resumes".* FROM "resumes" WHERE "resumes"."id" = ? LIMIT 1  [["id", 0]]
Redirected to https://rails-tutorial-martinbortowski.c9.io/
Completed 302 Found in 3ms (ActiveRecord: 0.2ms)


Started GET "/" for 77.8.13.5 at 2017-08-23 21:22:15 +0000
Cannot render console from 77.8.13.5! Allowed networks: 127.0.0.1, ::1, 127.0.0.0/127.255.255.255
Processing by WelcomesController#index as HTML
  Rendered welcomes/index.html.erb within layouts/application (0.2ms)
Completed 200 OK in 39ms (Views: 38.4ms | ActiveRecord: 0.0ms)

Answer 1

你下载的链接似乎有误。

更改 routes.rb

get "resumes/download", as: "resume_download"

到

controller :resumes do
  get "resumes/download/:id" => :show, as: :resume_download
end

<强>视图/恢复/ show.html.erb

更改链接

<%= link_to "Download", resume_download_path(@resume) %>

到

<%= link_to "Download", resume_download_path(id: @resume) %>

Answer 2

var ans = db.myTable.Where("it.myColumn LIKE 'text _'");

将为您提供一个惯用的正确REST路由：

resources :resumes do
  get :download, on: :member
end

将您的链接更改为：

resumes/:id/download

请参阅Rails Routing from the Outside In - Adding More RESTful Actions。

如何从rails中的数据库下载上传的存储文件？

2 个答案: