无法上传文件 [英] Cannot upload file

问题描述

我上传文件时遇到问题:

I have problems to upload a file:

这是我的 html:

<%= form_tag import_test_path, multipart: true do %>
 <%= file_field_tag :file, :style => 'display:inline; margin-top:-10px' %>
 <%= submit_tag 'Hochladen', :class => 'btn btn-sm btn-info' %>
<% end %> 

首先，我尝试简单地上传它并在我的控制器中像这样处理它:

First i tried to simply upload it and to handle it in my controller like this:

  def import
    widgets = DBF::Table.new(params[:file], nil, 'cp1252')
    w = widgets.find(6)
    p = Patient.new
    p.vorname = w.vorname
    p.name = w.name
    p.geburtsdatum = w.geburt
    p.save
    respond_to do |format|
     format.html {redirect_to :back }
    end  
  end

但这引发了一个错误:

 no implicit conversion of ActionDispatch::Http::UploadedFile into String
 in line: DBF::Table.new(params[:file], nil, 'cp1252')

接下来我尝试先生成一个临时文件:

Next i tried to generate first an Tempfile:

def import
    file = Tempfile.new(params[:file])
    widgets = DBF::Table.new(file, nil, 'cp1252')
    w = widgets.find(6)
    p = Patient.new
    p.vorname = w.vorname
    p.name = w.name
    p.geburtsdatum = w.geburt
    p.save
    respond_to do |format|
     format.html {redirect_to :back }
    end  
  end

但这也证明是错误的:

 unexpected prefix_suffix: #<ActionDispatch::Http::UploadedFile:0x6793d10 @tempfile=#  <Tempfile:C:/Users/EMMANU~1/AppData/Local/Temp/RackMultipart20131110-6816-ogkd3i>, @original_filename="patient.DBF", @content_type="application/octet-stream", @headers="Content-Disposition: form-data; name=\"file\"; filename=\"patient.DBF\"\r\nContent-Type: application/octet-stream\r\n">
 in line: file = Tempfile.new(params[:file])

我做错了什么?谢谢，祝你有美好的一天！

What do i wrong? Thanks and have a nice day!

推荐答案

Accessing params[:file] 是一个 ActionDispatch::Http::UploadedFile 它只是一个用于存储上传内容的 TmpFile 的包装器.

Accessing params[:file] is a ActionDispatch::Http::UploadedFile which is just a wrapper for the TmpFile that is used to store the uploaded content.

您需要从类似 IO 的对象中read 以获取内容.

You need to read from that IO like object to get the contents.

这篇关于无法上传文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！