Sprockets::Rails::Helper::AssetNotFound in Projects#show

Posted 2023-03-22

【中文标题】Sprockets::Rails::Helper::AssetNotFound in Projects#show

【英文标题】：

【发布时间】：2019-04-04 23:14:19

【问题描述】：

我想用carrierwave上传多张照片。这是我所拥有的：

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

  # Provide a default URL as a default if there hasn't been a file uploaded:
  # def default_url(*args)
  #   # For Rails 3.1+ asset pipeline compatibility:
  #   # ActionController::Base.helpers.asset_path("fallback/" + [version_name, "default.png"].compact.join('_'))
  #
  #   "/images/fallback/" + [version_name, "default.png"].compact.join('_')
  # end

  # Process files as they are uploaded:
  # process scale: [200, 300]
  #
  # def scale(width, height)
  #   # do something
  # end

  # Create different versions of your uploaded files:
   version :thumb do
     process resize_to_fit: [50, 50]
   end

   version :small do
     process resize_to_fit: [200, 200]
   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

  # Override the filename of the uploaded files:
  # Avoid using model.id or version_name here, see uploader/store.rb for details.
  # def filename
  #   "something.jpg" if original_filename
  # end
end

项目.rb

class Project < ApplicationRecord
  mount_uploaders :images, ImageUploader 
end

_form.html.erb

<%= form_with(model: @project) do |f| %>
<div id="new_project_form">
  <%= f.label :name %><br />
  <%= f.text_field :name %><br />
  <%= f.file_field :images, multiple: true %><br />
  <%= f.label :caption %><br />
  <%= f.text_area :caption %><br />
  <%= f.submit %>
</div>
<% end %>

show.html.erb

<h1><%= @project.name %></h1>
<%= image_tag @project.images_urls.to_s %>
<%= @project.caption %>

<%= link_to "edit", edit_project_path(@project) %>

当我上传包含多个图像的项目时出现此错误：

资产管道中不存在资产“[\”/uploads/project/images/5/%5B%22Screenshot_20181028-145315.png%22%5D\"]”。

我做错了什么？谢谢！

【参考方案1】：

image_tag 是一个资产助手，它旨在显示来自资产管道的图像 - 而不是创建通用的 <img> 标签。

您应该改用常规的 tag 助手：

<%= tag :img, src: @project.images_urls.to_s %>

【讨论】：

这实际上并没有解决问题，但我仍然赞成它，因为这是个好建议。谢谢！