为Rails应用创建上传控制器操作

Question

I'm making a Rails app, and want to add an upload feature with allows users to upload multiple entries at once through an Excel spreadsheet as opposed to entering one entry at a time.

Ideally, I was hoping to add a separate Upload/Submit portion to the bottom of the new.html.erb file (the bold portion being the Upload HTML.erb):

...
<div class="actions">
    <%= f.submit %>
</div>
<% end %>

**<div class="field">
    Or Upload Multiple Entries <br />        
    <%= form_tag({:action => :upload}, :multipart => true) do %>
        <%= file_field_tag 'multi_doc' %>        
    <% end %>
</div>**

Here is my routes.rb file:

Dataway::Application.routes.draw do
    devise_for :users

    resources :revenue_models do
      get 'upload', :on => :collection         
    end

    root :to => "home#index"
end

And my revenue_models_controller (haven't developed the action at all yet, now just a redirect):

...
def upload
    redirect_to revenue_models_path
end

I have followed the rails guides for Uploading files as well as for Routing files and I keep getting an error when I attempt to open the /new view I have modified:

    Routing Error
        No route matches {:action=>"upload", :controller=>"revenue_models"}
    Try running rake routes

When I run rake route, I get an entry for the upload action:

upload_revenue_models GET    /revenue_models/upload(.:format)   revenue_models#upload

In the end, what I would like to do is upload an excel file with multiple entries, parse it, and conditionally add each data row to my database, which I was under the impression I could specify in the upload action. Please help!

Answer 1

Please use form_for instead form_tag .

Second What is multi_doc is a field/attribute of revenue_model ?. I guess is a field/attribute of revenue_model .

Third, Where is your instance variable revenue_model in the form?

Fourth, You have to create first a instance variable of your Model, on your action/controller where you are showing the form, for example @revenue_model = RevenueModel.new .

After try this code:

<%= form_for(@revenue_model, :method => :get, :html => {:multipart => true}, :url => { :controller => "revenue_models", :action => "upload"})) do |f| %>
 <%= f.file_field :multi_doc %>
 <%= f.submit :id => "any_id" %>
<% end %>

The question is very confusing, trying to clarify your question specifying the name of your actions and the names of the files in your views.

Regards!