Question

我正在设置Carrierwave为我的嵌套模型上传图片。现在Rails没有错误，Carrierwave没有上传图像文件。我希望得到一些调试帮助。这是我的设置，想要一个带有一个或多个DeskImages的模型Desk：

desk.rb

class Desk < ActiveRecord::Base
  has_many :desk_images, :inverse_of => :desk, :dependent => :destroy
  accepts_nested_attributes_for :desk_images, allow_destroy: true
end

desk_image.rb

class DeskImage < ActiveRecord::Base
  belongs_to :desk
  mount_uploader :image, DeskImageUploader
end

desk_image_upload.rb

class DeskImageUploader < CarrierWave::Uploader::Base
....
end

desks_controller.rb

class DesksController < ApplicationController
def create
  @desk = Desk.new(desk_params)

  respond_to do |format|
    if @desk.save

      if params[:images]
        params[:images].each { |image|
          @desk.desk_images.create(image: image)
        }
      end

      format.html { redirect_to @desk, notice: 'Desk was successfully created.' }
    else
      format.html { render :new }
    end
  end
end

/views/desks/_form.html.erb

<%= simple_form_for(@desk) do |f| %>
  <%= f.error_notification %>
  <div class="form-inputs">
    <%= file_field_tag "images[]", type: :file, multiple: true %>
    <%= f.input :name %>
  </div>
  <div class="form-actions">
    <%= f.button :submit %>
  </div>
<% end %>

我做错了吗？

Answer 1

使用带有carrierwave的嵌套表单总是很棘手。我们试着解决你的问题。

一切都取决于架构中的图像列类型。如果你也可以上传模式文件和你的Gem文件会很好。我会给你没有simple_form gem的解决方案。

我假设您安装了gem 'carrierwave'，并且您的图片列位于表desk_images中，其类型为字符串。如果您正确迁移，则还应该在架构中使用desk_id整数类型。

在desk_image_upload.rb中指定文件类型和上传图片的路径。我可以看到你的文件是空的，这意味着你没有运行rake generate uploader DeskImage，它会自动填充you!的上传文件（小错字，应该是desk_image_uploader.rb）：< / p>

  storage :file

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

检查desks_controller.rb中的强对数并创建关联。

  def show
    @desk_images = @desk.desk_images.all
  end

  def new
    @desk = Desk.new
    @desk_images = @desk.desk_images.build
  end

    def create
    @desk = Desk.new(desk_params)

    respond_to do |format|
      if @desk.save

        params[:desk_images]['image'].each do |img|
        @desk_images = @desk.desk_images.create!(:image => img)
      end

        format.html { redirect_to @desk, notice: 'Desk was successfully created.' }
      else
        format.html { render action: 'new' }
      end
    end
  end


 def desk_params
      params.require(:desk).permit(:title, desk_images_attributes: [:id, :desk_id, :image])
    end

在 /views/desks/_form.html.erb 中添加多部分表单数据:html => { :multipart => true })

  <%= form_for(@desk, :html => { :multipart => true }) do |f| %>

  <%= f.fields_for :desk_images do |d| %>
   <div class="field">
     <%= d.label :image %><br>
     <%= d.file_field :image, :multiple => true, name: "desk_images[image][]" %>
   </div>
 <% end %>

注意：如果您安装了gem，'carrierwave', github: 'carrierwaveuploader/carrierwave'事情会发生变化。您需要在DB中使用JSON或数组列类型，并在上传器中使用mount_uploaders :images。（复数）请检查here

当您提交带有图像/图像的表单时，请检查您的控制台是否有参数。您还可以在日志文件夹中检查文件development.log
中的日志
我希望它有所帮助

Carrierwave嵌套模型设置：不上传文件而不是错误

1 个答案: