Question

我使用carrierwave上传和下载文件。这是我的模特：

class InvoiceDetail < ActiveRecord::Base
    mount_uploader :attachment, AttachmentUploader
  validates :invoice_number, :supplier_name, :attachment, presence: true    
  validates_uniqueness_of :invoice_number
end

附接/ uploader.rb：

 def store_dir
    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  end

invoice_detail / _form.html.erb：

<%= form_for(@invoice_detail , html: {class: 'form-horizontal', role: 'form' }) do |f| %>

    <div class="field">
        <%= f.label :invoice_number, :class => 'control-label' %>
            <div class="controls">
    <%= f.text_field :invoice_number, :class => 'text_field' %>
  </div>
  </div>
    <div class="field">
    <%= f.label :supplier_name, :class => 'control-label' %>
                <div class="controls">

    <%= f.text_field :supplier_name, :class => 'text_field' %>
    </div>
  </div>

     <div class="control-group">
      <%= f.label :attachment , :class => 'control-label' %>
      <div class="controls">
        <%= f.file_field :attachment, :class => 'file_field' %>
      </div>
    </div>
  <div class="form-actions">
    <%= f.submit "Create Invoice Details", :class => 'btn btn-primary' %>
    <%= f.submit "cancel", :class => 'btn btn-danger', method: :delete, data: { confirm: 'Are you sure you want to cancel' } %>

  </div>
<% end %>

我上传的文件存储在我的rails应用程序的public / uploads文件夹中。现在我的要求是上传我在表格中输入的invoice_number文件，当我点击下载时，必须使用相同的发票编号下载该文件。（例如，我输入的发票号码为：1234，上传文件名为example.xlsx，上传的文件必须存储为1234.xlsx）请帮帮我。

Answer 1

你可以rename file during upload：

def filename
  "#{model.invoice_number}.#{file.extension}" if original_filename.present?
end

在rails中使用carrierwave更改我们上传的文件名

1 个答案: