Question

下午所有，

我有一个控制器来处理新文件上传的创建（它是一个任务，所以我不能使用paperclip并将其保存到数据库，所以我知道所有这些的缺点，可以听到你抱抱lol）但是当文件保存的验证失败（即尝试上传任何内容）时，重定向到新上载表单似乎没有做任何事情并尝试呈现索引页面。我已尝试使用渲染，redirect_to（：back）等重定向的大量变体，但似乎没有任何实际做任何事情。

如果有人有任何想法，我将不胜感激。

继承人的代码。

控制器

def create
    beginning = Time.now
    return if params[:attachment].blank?

    @attachment = Attachment.new
    @attachment.uploaded_file = params[:attachment]
    @time = (Time.now - beginning)
    if @attachment.save
      flash[:success] = "File uploaded in #{@time} seconds"
      redirect_to @attachment
    else
      flash[:notice] = "something went wrong"
      redirect_to 'new
    end
 end

模型

class Attachment < ActiveRecord::Base
  has_many :anagrams, dependent: :destroy
  attr_accessible :filename, :content_type, :data
  validates_presence_of :filename, :data, :content_type

  def uploaded_file=(incoming_file)
    self.filename = incoming_file.original_filename
    self.content_type = incoming_file.content_type
    self.data = incoming_file.read
  end

  def filename=(new_filename)
    write_attribute("filename", sanitize_filename(new_filename))
  end

  private

  def sanitize_filename(filename)
    just_filename = File.basename(filename)
    just_filename.gsub(/[^\w\.\-]/, '_')
  end
end

的routes.rb

 resources :attachments, only: [:create, :new]
  resources :anagrams, only: [:create, :new]


 root to: "attachments#new"

如果有人需要看到更多的代码只是喊，非常感谢

Answer 1

您应该再次渲染表单，以便显示错误，而不是重定向到'new'。例如：

if @attachment.save
  flash[:success] = "File uploaded in #{@time} seconds"
  redirect_to @attachment
else
  flash.now[:notice] = "something went wrong"
  render :action => 'new
end

如果您确实需要重定向，则应调试错误。您可以通过以下方式转储错误：

puts @attachment.errors.inspect

它看起来很脏，但我们可以很快找到问题：D

Answer 2

我设法让这个工作，[：attachment] .blank？我正在做我想做的其他声明，但我没想到把闪光灯通知并在那里渲染“新”。切换它并且工作。

 def create
   beginning = Time.now
   if params[:attachment].blank?
     flash[:error] = "Please upload a file"
     render 'new'
   else
    @attachment = Attachment.new
    @attachment.uploaded_file = params[:attachment]
    @time = (Time.now - beginning)
    if @attachment.save
      flash[:success] = "File uploaded in #{@time} seconds"
      redirect_to @attachment
   end
  end
end

Rails 3重定向文件上传错误

2 个答案: