Carrierwave不創建上傳文件夾

Question

我的主要問題是，通過載波上傳文件時，文件並未真正上傳。

我的控制台輸出：

#<OptionPic id: 4, image_url: "game_of_thrones___tyrion_lannister_by_stanbos-d79k...", created_at: "2015-08-07 06:08:01", updated_at: "2015-08-07 06:08:01", option_id: 12>]>

該圖像的調用如下

-@product.options.each do |option|
          -option.option_pics.each do |op|
            =image_tag op.image_url.to_s

如果我檢查網頁上的元素，則會得到以下信息：

<img src="/images/game_of_thrones___tyrion_lannister_by_stanbos-d79k0u9_modified.jpg" alt="Game of thrones tyrion lannister by stanbos d79k0u9 modified">

但是，上傳器上的設置如下：

class ProductImageUploader < 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

不用說，我既沒有在asset / images文件夾中創建圖像，也沒有創建public / uploads文件夾。

這在我的其他項目（使用與上面相同的語法創建的public / uploads文件夾）中完美運行，在該項目中圖像作為單獨的模型存儲。 在我當前的項目中，我希望它們作為產品類的子選項。

結構如下：

型號-產品，選項，選項pic（ture）

一個產品可以有很多選項，而一個選項又可以有很多圖片。 例如-產品是T恤。 選項包括：材料和顏色。 對於每種顏色，我想要一件不同的襯衫圖片。

這就是為什么我的ProductsController中包含所有內容的原因：

  Class ProductsController < ApplicationController

  before_action :find_product, only: [:show]

  def show
  end

  def index
    @products = Product.all
  end

  def new
    @product = Product.new
    @option = @product.options.new
    @option_pic = OptionPic.new
  end

  def edit
  end

  def create
    @product = Product.create(product_params)
    @option = @product.options.create(option_params)
    @option.product_id = @product.id
    @option.save

    @option_pic = @option.option_pics.create(pic_params)
    @option_pic.option_id = @option.id

    flash[:success] = "Product successfully created!"
    redirect_to products_path
  end

  private

    def product_params
        params.require(:product).permit(:title, :description, :advertising_text, :fancy_quote)
    end

    def option_params
      params.require(:option).permit(:size, :weight, :price, :material, :product_id)
    end

    def pic_params
      params.require(:option_pic).permit(:image_url, :option_id)
    end

    def find_product
        @product = Product.find(params[:id])
    end
end

我的optionpic（ture）模型：

class OptionPic < ActiveRecord::Base
    mount_uploader :product_image, ProductImageUploader
    belongs_to :option
end

我想我只是在犯一些愚蠢的新手錯誤，但是經過數小時的搜索，我無法弄清什么地方出了問題。

編輯

我發現了兩件事-我使用image_url而不是picture_image並忘記了實際上將option_picture值保存在控制器中，即@option_pic.save

現在上傳時沒有數據傳輸：

SQL (0.3ms)  INSERT INTO "option_pics" ("product_image", "option_id", "created_at", "updated_at") VALUES ($1, $2, $3, $4) RETURNING "id"  [["product_image", nil], ["option_id", 18], ["created_at", "2015-08-07 08:03:28.559319"], ["updated_at", "2015-08-07 08:03:28.559319"]] 

我將每個值從：image_url更新為：product_image（在視圖中，在pic_params等中）

編輯2

根據要求，我的上傳表單：

%h1 Create new product

=form_for @product, url: products_path do |f|
    %p
        =f.label :title
        =f.text_field :title
        %br
        =f.label :description
        =f.text_area :description
        %br
        =f.label :advertising_text
        =f.text_area :advertising_text
        %br
        =f.label :fancy_quote
        =f.text_area :fancy_quote

    %p
        = fields_for @option do |o|
            =o.label :price
            =o.text_field :price
            %br
            =o.label :size
            =o.text_field :size
            %br
            =o.label :weight
            =o.text_field :weight
            %br
            =o.label :material
            =o.text_field :material
    %p
        = fields_for @option_pic, html: { multipart: true } do |op|
            = op.label 'Upload image'
            = op.file_field :product_image
    =f.submit

編輯3

根據要求，我的日志參數

Started POST "/products" for ::1 at 2015-08-07 12:25:31 +0300
Processing by ProductsController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"DOeZMvYpdoVmZRpsGmg2Gr9LIc9RYaS1KT1vdfhXI2BJaV3pPZZbZN8PJnvwQAig8wLPpIUORuf7Kjcw3BE6Zg==", "product"=>{"title"=>"fafa", "description"=>"", "advertising_text"=>"", "fancy_quote"=>""}, "option"=>{"price"=>"", "size"=>"", "weight"=>"", "material"=>""}, "option_pic"=>{"product_image"=>"level-3-on-rails-for-zombies-2-0eaaf0109f83459c5aedef30bdf8bd96.png"}, "commit"=>"Create Product"}
   (0.1ms)  BEGIN
  SQL (0.3ms)  INSERT INTO "products" ("title", "description", "advertising_text", "fancy_quote", "created_at", "updated_at") VALUES ($1, $2, $3, $4, $5, $6) RETURNING "id"  [["title", "fafa"], ["description", ""], ["advertising_text", ""], ["fancy_quote", ""], ["created_at", "2015-08-07 09:25:31.365739"], ["updated_at", "2015-08-07 09:25:31.365739"]]
   (0.3ms)  COMMIT
   (0.1ms)  BEGIN
  SQL (0.2ms)  INSERT INTO "options" ("size", "material", "product_id", "created_at", "updated_at") VALUES ($1, $2, $3, $4, $5) RETURNING "id"  [["size", ""], ["material", ""], ["product_id", 29], ["created_at", "2015-08-07 09:25:31.369112"], ["updated_at", "2015-08-07 09:25:31.369112"]]
   (0.3ms)  COMMIT
   (0.1ms)  BEGIN
   (0.1ms)  COMMIT
   (0.1ms)  BEGIN
  SQL (0.3ms)  INSERT INTO "option_pics" ("product_image", "option_id", "created_at", "updated_at") VALUES ($1, $2, $3, $4) RETURNING "id"  [["product_image", nil], ["option_id", 21], ["created_at", "2015-08-07 09:25:31.372492"], ["updated_at", "2015-08-07 09:25:31.372492"]]
   (0.3ms)  COMMIT
Redirected to http://localhost:3000/products
Completed 302 Found in 10ms (ActiveRecord: 2.1ms)

Answer 1

您沒有正確訪問params值。 以下將解決此問題：

def pic_params
  params.require(:option_pic).require(:product_image)
end

另外，在構建OptionPic時必須使其屬於Option：

def new
  @product = Product.new
  @option = @product.options.new
  @option_pic = @option.option_pics.new
end

Answer 2

如果有人遇到相同的問題，我將發布解決方案-我決定使用嵌套屬性重新創建該系統，現在一切正常！

因此，這里有3個模型：

class Product < ActiveRecord::Base

    belongs_to  :category 
    belongs_to  :subcategory
    has_many    :options

    has_and_belongs_to_many :product_sizes

    accepts_nested_attributes_for :options

end

選項類，它是產品的子級

class Option < ActiveRecord::Base
    belongs_to  :product
    has_many    :option_pics

    accepts_nested_attributes_for :option_pics
end

最后是option_pic，是Option的子代

class OptionPic < ActiveRecord::Base
    mount_uploader :product_image, ProductImageUploader
    belongs_to :option
end

在產品控制器中，我的new和create動作如下所示：

  def new
    @product = Product.new
    option = @product.options.build
    option_pic = option.option_pics.build
  end

  def edit
  end

  def create
    @product = Product.new(product_params)

    if @product.save!
      flash[:success] = "Product successfully created!"
      redirect_to products_path
    end
  end

  private

    def product_params
        params.require(:product).permit(
        :title, :description, :advertising_text, :fancy_quote, :category_id, 
        options_attributes: [:size, :weight, :price, :material, :product_id, 
          option_pics_attributes: [:product_image, :option_id]])
end

def find_product
    @product = Product.find(params[:id])
end

字符串參數是雙重嵌套的，這一點很重要。 同樣重要的是form_for輔助程序的結構。 我沒有重構它，所以現在它是一大清單。 那里的結構非常重要，我將option_pic的字段指定在“ f”變量的級別上，這很關鍵，並且沒有上載任何圖像。

=form_for @product, url: products_path do |f|
    %p
        =f.label :title
        =f.text_field :title
        %br
        =f.label :description
        =f.text_area :description
        %br
        =f.label :advertising_text
        =f.text_area :advertising_text
        %br
        =f.label :fancy_quote
        =f.text_area :fancy_quote
        %br
        =f.label :category_id
        =f.collection_select :category_id, Category.all, :id, :title, { prompt: 'Please select category' }
        %br
        =f.label 'Product Size'
        =f.collection_check_boxes(:product_size_ids, ProductSize.all, :id, :size)

    %p
        = f.fields_for :options do |builder|
            =builder.label :price
            =builder.text_field :price
            %br
            =builder.label :size
            =builder.text_field :size
            %br
            =builder.label :weight
            =builder.text_field :weight
            %br
            =builder.label :material
            =builder.text_field :material
            %br
            =builder.fields_for :option_pics do |op|
                = op.label 'Upload image'
                = op.file_field :product_image
    =f.submit

瞧，很棒的承諾：

(0.1ms)  BEGIN
  SQL (0.4ms)  INSERT INTO "products" ("title", "description", "advertising_text", "fancy_quote", "category_id", "created_at", "updated_at") VALUES ($1, $2, $3, $4, $5, $6, $7) RETURNING "id"  [["title", "builder"], ["description", ""], ["advertising_text", ""], ["fancy_quote", ""], ["category_id", 1], ["created_at", "2015-08-11 11:34:11.618298"], ["updated_at", "2015-08-11 11:34:11.618298"]]
  SQL (0.2ms)  INSERT INTO "options" ("size", "price", "material", "product_id", "created_at", "updated_at") VALUES ($1, $2, $3, $4, $5, $6) RETURNING "id"  [["size", ""], ["price", 555], ["material", ""], ["product_id", 82], ["created_at", "2015-08-11 11:34:11.619678"], ["updated_at", "2015-08-11 11:34:11.619678"]]
  SQL (0.5ms)  INSERT INTO "option_pics" ("product_image", "option_id", "created_at", "updated_at") VALUES ($1, $2, $3, $4) RETURNING "id"  [["product_image", "b3c839_bd43d840e031469495137fa74e31faf4.jpg_srz_428_428_75_22_0.5_1.2_75_jpg_srz"], ["option_id", 66], ["created_at", "2015-08-11 11:34:11.620837"], ["updated_at", "2015-08-11 11:34:11.620837"]]
   (0.3ms)  COMMIT