Ruby on rails Ruby on Rails和Carrierwave Gem：图像上传保存；“无”；到数据库

好吧，我已经试着诊断了好几天了，我正在拔头发。出于某种原因，无论我做什么，当我试图通过Carrierwave上传器上传图像时，它会在数据库中保存“nil”，而不是图像。如果这有什么意义的话，我也试过蜻蜓，我也有一些问题。任何信息都会有帮助，我只是真的需要修复这个。以下是相关文件：

newexpense.html.erb

<%= form_for @new_expenses, html: { multipart: true } do |t| %>
  <fieldset>
    <%= t.text_field :dateActivity, { :id => "expenseDate", :placeholder => "Date of Expense"} %>
    <%= t.text_field :typeOfExpense, { :placeholder => "Type" } %>
    <%= t.text_field :amount, {  :id => "amountInput" , 'placeholder' => 'Amount $0.00', :step => 0.01 } %>
    <%= t.text_field :payment, { :placeholder => "Payment Type" } %>
    <%= t.text_field :notes, {:class => "form-control", :placeholder => "Description"} %>
  </fieldset>
  <div style="line-height:75%;"><br></div>
  <fieldset>
    <%= t.file_field :image %><br>
    <%= button_tag "Submit", type: 'submit', id: "contact-submit" %>
  </fieldset>
<% end %>

<% @expenses.each do |e| %>
  <p>Type: <%= e.typeOfExpense %></p>
  <p>Amount: $<%= e.amount %></p>
  <p>Payment Type: <%= e.payment %></p>
  <p>Description: <%= e.notes %></p>
  <%= image_tag e.image %>
<% end %>

image_uploader.rb

class ImageUploader < CarrierWave::Uploader::Base

  # Include RMagick or MiniMagick support:
  # include CarrierWave::RMagick
  # include CarrierWave::MiniMagick

  # Choose what kind of storage to use for this uploader:
  storage :file
  # storage :fog

  # Override the directory where uploaded files will be stored.
  # This is a sensible default for uploaders that are meant to be mounted:
  def store_dir
    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  end


  # Add a white list of extensions which are allowed to be uploaded.
  # For images you might use something like this:
   def extension_whitelist
     %w(jpg jpeg gif png)
   end



end

---

我真的很难理解为什么我的图片不能保存。感谢大家在

用户中提供的任何帮助：D
。rb

型号，您是否有

具有多个：图像、依赖：：销毁
和
接受嵌套的属性\u用于：图像
？这似乎是我看到的我的应用程序（成功使用CarrierWave）和你的应用程序之间的唯一区别…非常感谢，但不幸的是没有骰子。尽管出于好奇，你有没有“图像”作为模特？或者只是模型内部的一段数据？我以为您只使用了模型之间的许多关系。是的，我有一个名为
ListingImage
的模型，其中包含
mount\u uploader:image，ImageUploader
语句，您在
模型中有该语句。因此，我想在你的例子中，你需要在用户和费用之间为
拥有许多
和接受

的嵌套属性。在你的

user.rb

模型中，你是否有

拥有_许多：图像，依赖：：销毁

和

接受

为：图像的嵌套属性？这似乎是我看到的我的应用程序（成功使用CarrierWave）和你的应用程序之间的唯一区别…非常感谢，但不幸的是没有骰子。尽管出于好奇，你有没有“图像”作为模特？或者只是模型内部的一段数据？我以为您只使用了模型之间的许多关系。是的，我有一个名为

ListingImage

的模型，其中包含

mount\u uploader:image，ImageUploader

语句，您在

模型中有该语句。所以我想在你的例子中，你需要
在用户和费用之间有很多
并且
接受
的嵌套属性。
    def create
          @new_expenses = Expense.new(params_final_expense)
          if @new_expenses.save
            flash[:success] = "Expense entry created!"

            redirect_to expenses_url
          else
            flash[:success] = "Expense entry failed :("
            redirect_to expenses_url
          end

      end

  private

  def params_final_expense
    new_pages_params_expense.merge(:user => current_user)
  end

  def new_pages_params_expense
    params.require(:expense).permit(:dateActivity, :typeOfExpense, :amount, :payment, :notes, :image)
  end

class ImageUploader < CarrierWave::Uploader::Base

  # Include RMagick or MiniMagick support:
  # include CarrierWave::RMagick
  # include CarrierWave::MiniMagick

  # Choose what kind of storage to use for this uploader:
  storage :file
  # storage :fog

  # Override the directory where uploaded files will be stored.
  # This is a sensible default for uploaders that are meant to be mounted:
  def store_dir
    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  end


  # Add a white list of extensions which are allowed to be uploaded.
  # For images you might use something like this:
   def extension_whitelist
     %w(jpg jpeg gif png)
   end



end

Processing by PagesController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"HUHjhuisdfjwieuhIUHOUHusdf", "expense"=>{"dateActivity"=>"2016-12-19", "typeOfExpense"=>"", "amount"=>"", "payment"=>"", "notes"=>"", "image"=>"043.png"}, "button"=>""}
  User Load (1.0ms)  SELECT  "users".* FROM "users"  WHERE "users"."id" = 5  ORDER BY "users"."id" ASC LIMIT 1
   (1.0ms)  begin transaction
  SQL (1.0ms)  INSERT INTO "expenses" ("created_at", "dateActivity", "image", "notes", "payment", "typeOfExpense", "updated_at", "user_id") VALUES (?, ?, ?, ?, ?, ?, ?, ?)  [["created_at", "2016-12-19 19:56:40.537849"], ["dateActivity", "2016-12-19"], ["image", nil], ["notes", ""], ["payment", ""], ["typeOfExpense", ""], ["updated_at", "2016-12-19 19:56:40.537849"], ["user_id", 5]]