从csv文件导入数据时,无法批量分配受保护的属性 [英] Can't mass-assign protected attributes when import data from csv file

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问题描述

我有一个用于导入如下数据的表单:

 <%= form_tag({controller:'courses' action::import},multipart:true)do%> 
<%= label_tag'file','导入数据'%>
<%= file_field_tag'file'%>
<%= submit_tagImport,name:nil,class:'btn'%>
<%end%>

这是我的导入操作:

  def import 
require'csv'

csv_text = File.read(params [:file] .tempfile.to_path.to_s)
csv = CSV.parse(csv_text,headers:true)
csv.each do | row |
row = row.to_hash.with_indifferent_access
Course.create(row.to_hash.symbolize_keys)
end
flash [:success] =成功导入数据。
redirect_to courses_url
end

但是当我选择一个文件, code>在浏览器中导入时出现错误:

  ActiveModel :: MassAssignmentSecurity ::错误在CoursesController#import 
无法大量分配受保护的属性:名称,代码

在我的课程模型中, name code 已经是attr_accessible :

  class Course< ActiveRecord :: Base 
attr_accessible:code,:name
end



更新

这是我的csv档案:

 名称,代码
ERP系统,HT555DV01
数据挖掘,HT459DV01

创建数据的新代码

  csv。 each do | row | 
Course.create!(name:row [0],code:row [1])$ ​​b $ b end


解决方案

尝试此

  csv.each do | row | 
row = row.to_hash.with_indifferent_access
Course.create(row.to_hash.symbolize_keys)
end

替换为

  csv.each do | row | 
Course.create(row.to_hash)
end

更新

  csv_file = File.read(params [:file] .tempfile.to_path.to_s)
csv = CSV.parse(csv_file,:headers => true)
csv.each do | row |
Course.create!(:name => row [0],:code => row [1])$ ​​b $ b end

更新2

  csv_file = params [ :file] .read 
CSV.parse(csv_file)do | row |
course = Course.create(row)
course.save
end

source =>
http ://www.funonrails.com/2012/01/csv-file-importexport-in-rails-3.html
http://erikonrails.snowedin.net/?p=212


I have a form for import data like this:

<%= form_tag({ controller: 'courses', action: :import }, multipart: true) do %> 
  <%= label_tag 'file', 'Import data' %>
  <%= file_field_tag 'file' %>
  <%= submit_tag "Import", name: nil, class: 'btn' %>
<% end %>

This is my import action:

def import
  require 'csv'

  csv_text = File.read(params[:file].tempfile.to_path.to_s)
  csv = CSV.parse(csv_text, headers: true )
  csv.each do |row|
    row = row.to_hash.with_indifferent_access
    Course.create(row.to_hash.symbolize_keys)
  end
  flash[:success] = "Successfully import data."
  redirect_to courses_url
end

But when i choose a file and press button Import in browser, i got error:

ActiveModel::MassAssignmentSecurity::Error in CoursesController#import
Can't mass-assign protected attributes: Name, Code

In my Course model, name and code already are attr_accessible:

class Course < ActiveRecord::Base
  attr_accessible :code, :name
end

What's wrong with my code?

Updated
This is my csv file:

name, code
ERP System, HT555DV01
Data Mining, HT459DV01

New code to create data

csv.each do |row|
  Course.create!(name: row[0], code: row[1])
end

解决方案

try this

csv.each do |row|
  row = row.to_hash.with_indifferent_access
  Course.create(row.to_hash.symbolize_keys)
end

replace to

  csv.each do |row|
    Course.create(row.to_hash)
  end

Update

csv_file = File.read(params[:file].tempfile.to_path.to_s)
csv = CSV.parse(csv_file, :headers => true) 
csv.each do |row|
   Course.create!(:name => row[0], :code => row[1])    
end    

Update 2

csv_file = params[:file].read
CSV.parse(csv_file) do |row|
   course = Course.create(row)
   course.save
end

source => http://www.funonrails.com/2012/01/csv-file-importexport-in-rails-3.html http://erikonrails.snowedin.net/?p=212

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