Ruby on rails ActiveStorage未上载或未加载的问题

因此，我试图为用户（设计）添加将图像上传到列表的功能

首先：我有一个listings控制器，并定义了listings参数

def listing_params
  params.require(:listing).permit(:title, :description, images: [])
end

下一步：在列表模型中，我有：

class Listing < ApplicationRecord
  belongs_to :user
  has_many_attached :images
end

有了这些，我认为它可以工作，但当上传图像时，它会给我一个错误：

NoMethodError in Listings#index
Showing /Users/timbogdanov/Desktop/vend/app/views/listings/index.html.haml where line #5 raised:

undefined method `images' for #<Listing::ActiveRecord_Relation:0x00007f8ef1208578>
Extracted source (around line #5):

  - @listings.each do |listing|
    .box
      - @listings.images.each do |image|
        = image_tag(@listings.images[image])
      .listing-info
        %h3= link_to listing.title, listing_path(listing)

清单中的命名错误#索引 显示/Users/timbogdanov/Desktop/vend/app/views/listings/index.html.haml，其中第5行出现： 未定义的方法“images”# 提取的源（第5行附近）： -@listings.each do| listing| .盒子 -@listings.images.each do| image| =image_标记（@listings.images[image]） .上市信息 %h3=链接到listing.title，listing\u路径（listing）

---

好吧，这是个愚蠢的错误。 看起来像是在我的索引视图文件中，我使用了变量@listings，而不是我刚才列出的每个外观

联合国：

.listings.has-gutters
  - @listings.each do |listing|
    .box
      - if listing.images.attached?
        - listing.images.each do |image|
          = image_tag(image)
      .listing-info
        %h3= link_to listing.title, listing_path(listing)
        %p= listing.description
        %p= listing.user.firstname

NoMethodError in Listings#index
Showing /Users/timbogdanov/Desktop/vend/app/views/listings/index.html.haml where line #5 raised:

undefined method `images' for #<Listing::ActiveRecord_Relation:0x00007f8ef1208578>
Extracted source (around line #5):

  - @listings.each do |listing|
    .box
      - @listings.images.each do |image|
        = image_tag(@listings.images[image])
      .listing-info
        %h3= link_to listing.title, listing_path(listing)

.listings.has-gutters
  - @listings.each do |listing|
    .box
      - if listing.images.attached?
        - listing.images.each do |image|
          = image_tag(image)
      .listing-info
        %h3= link_to listing.title, listing_path(listing)
        %p= listing.description
        %p= listing.user.firstname