读入文件内容栏 [英] Reading in file contents rails

问题描述

我有一个试图读取JSON文件以进行解析/动作/等的表单.我在将其读取到控制器中时遇到问题.

I have a form that is attempting to read in a JSON file for parsing/actions/etc. I'm having problems getting it to read in the controller.

查看:

<%= form_tag({:controller => :admins, :action => :upload_json}, {:multipart => true, :method => :post}) do |f| %>

    <%= file_field_tag 'datafile' %>

<%= submit_tag "Upload" %>

控制器:

def upload_json

  file_data = params[:datafile]

  File.read(file_data) do |file|

     file.each do |line|
       ## does stuff here....
     end
  end

end

当我为数据添加种子时，我的seed.rb文件中也可以使用类似的功能-只是无法读取上传的文件中的数据.

A similar function works in my seed.rb file when I'm seeding data - just can't get it to read in an uploaded file.

我遇到的错误是:can't convert ActionDispatch::Http::UploadedFile into String.

提前感谢您的帮助！

推荐答案

弄清楚了.需要更改:

file_data = params[:datafile]

到

file_data = params[:datafile].tempfile

并决定使用.open函数进行更改:

And decided to use the .open function to change:

File.read(file_data) do |file|

到

File.open(file_data, 'r') do |file|  

这篇关于读入文件内容栏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！