Ruby on Rails image_tag 不显示图像

Question

在 gemfile 中，我安装了carrierwave 以允许用户上传个人资料图片。我有点遵循这个 railscast 中的说明 - http://railscasts.com/episodes/253-carrierwave-file-uploads

gem 'carrierwave'

但是图像未使用 image_tag 显示。我可以通过在没有 image_tag 的情况下对其进行测试来查看图像目录。我还在图像目录中导航以确保存储图像。在director里可以看到“/uploads/user/image/110/”

在视图中，它显示图片网址 "/uploads/user/image/110/thumb_IMG_0017.JPG"

<%= @user.image_url(:thumb).to_s %>

添加图片标签不显示任何内容

<%= image_tag @user.image_url(:thumb).to_s %>

图像上传器

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

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

  version :thumb do
    process :resize_to_limit => [200, 200]
  end


end

控制器

def show
    @user = User.find(params[:id])
    ...
end

private

    def user_params
      params.require(:user).permit(:name, :email, :password, :password_confirmation, :image)
    end

型号

class User < ActiveRecord::Base
    ...

    mount_uploader :image, ImageUploader

    ...
end

直接查询数据库，例如用户 110 显示以下内容

User.find(110).image_url(:thumb)
User Load (2.1ms)  SELECT "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1  [["id", 110]]
 => "/uploads/user/image/110/thumb_IMG_0017.JPG" 

Answer 1

好的，我检查了服务器日志

Checked the server log looks like a routing issue - Started GET "/uploads/user/image/111/thumb_IMG_1355.JPG" for 127.0.0.1 at 2014-07-12 11:00:29 +0100

ActionController::RoutingError (No route matches [GET] "/uploads/user/image/111/thumb_IMG_1355.JPG"):

通过进入 config/environments/production.rb 和 development.rb 并将以下设置为 true，看起来问题将得到解决！

config.serve_static_assets = true

Answer 2

设置carrierwave后，您需要重新启动服务器。这将解决所有问题。