Excel导入：缺少参数或值为空

Question

我不知道为什么，但有一天我的 excel 导入不再起作用了。

查看：

<h1>Import Data</h1>
<br>
<div class="col-md-12">
  <center>
    <h2>Import List</h2>
    <br>
    <%= form_tag import_marcels_path, multipart: true do %>
      <%= file_field_tag :file %>
      <br>
      <%= submit_tag "Import" %>
    <% end %>
  </center>
</div>

控制器：

def import
  Marcel.import(params[:file])

  redirect_to root_url, notice: 'File imported.'
end

def create
  @marcel = Marcel.new(marcel_params)
  respond_to do |format|
    if @marcel.save
      format.html { redirect_to @marcel, notice: 'Marcel was successfully created.' }
      format.json { render :show, status: :created, location: @marcel }
    else
      format.html { render :new }
      format.json { render json: @marcel.errors, status: :unprocessable_entity }
    end
  end
end

def marcel_params
  params.require(:marcel).permit(:first_name, :last_name, :ldap)
end

型号：

class Marcel < ActiveRecord::Base

    def self.import(file)
      spreadsheet = Roo::Spreadsheet.open(file.path)
      header = spreadsheet.row(1)
      (2..spreadsheet.last_row).each do |i|
        row = Hash[[header, spreadsheet.row(i)].transpose]
        marcel = find_by(id: row["id"]) || new
        marcel.attributes = row.to_hash
        marcel.save!
      end
    end

    def self.open_spreadsheet(file)
      case File.extname(file.original_filename)
      when ".csv" then Roo::CSV.new(file.path, nil, :ignore)
      when ".xls" then Roo::Excel.new(file.path, nil, :ignore)
      when ".xlsx" then Roo::Excelx.new(file.path, nil, :ignore)
      else raise "Unknown file type: #{file.original_filename}"
      end
    end
end

routes.rb:

  # resources :marcels do
  #     collection do
  #       post :import
  #     end
  # end

  get 'marcels' => 'marcels#index'
  post 'import_marcels' => 'marcels#import'

现在我收到以下错误：

param is missing or the value is empty: marcel

 # Never trust parameters from the scary internet, only allow the white list through.
 def marcel_params
   params.require(:marcel).permit(:first_name, :last_name, :ldap)
 end end

{"utf8"=>"✓", 
"authenticity_token" => "tR2XHWpu1RB58fGMlAQQKXcQDD8ka8alVpTFztd7G5crgF0UfYwZHUNUN6+NsRF3AocT+2ljEZFNE2i+19Sfbw==",
"file"=>#<ActionDispatch::Http::UploadedFile:0x007f2cac0c2cb0
@tempfile=#<Tempfile:/tmp/RackMultipart20180322-6630-1fsopb3.csv>, 
@original_filename="test.csv", 
@content_type="application/vnd.ms-excel", 
@headers="Content-Disposition: form-data; name=\"file\";
filename=\"test.csv\"\r\nContent-Type: application/vnd.ms-excel\r\n">,
"commit"=>"Import"}

我不知道为什么现在会发生这种情况，但也许你们中有人知道我该如何解决这个问题。我从 def marcel_params 中排除了 .require(:marcel)。导入后没有错误发生，但 Excel 的值未保存在数据库中。

Answer 1

感谢 TarynEast，我找到了解决该问题的方法。路线有些东西没有像预期的那样工作所以我改变了路线：

  resources :marcels do
      collection do
        post :import
      end
  end

对此：

  get 'marcels' => 'marcels#index'
  post 'import_marcels' => 'marcels#import'

在此之后，导入工作正常。

Excel导入：缺少参数或值为空

Excel Import: Param is missing or the value is empty

ruby-on-rails

excel-import