ruby-on-rails – Rails 4 – Carrierwave图像无法上传

2019年7月27日 155次阅读

更新：感谢大家帮助我们解决这个问题.我决定放弃尝试学习并为配置文件模型添加另一个图像属性.这将是现在必须做的.

我试图在rails 4中制作应用程序.

我有一个用户模型,上面有一个头像属性.

我也有个人资料模型.

用户：有一个个人资料
个人资料：属于User

我拆分它们的原因是因为配置文件包含所有变量,而用户包含所有未经管理员权限无法更改的固定属性.

例外是我的用户模型具有我想允许用户更改的头像(图像)属性.

我在我的代码的其他部分有用户carrierwave,它的工作原理.但是,这个用例有些不对劲.

我有一个头像上传者：

class AvatarUploader < 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

  def cache_dir
    "#{Rails.root}/tmp/uploads"
  end

  # Provide a default URL as a default if there hasn't been a file uploaded:
  # def default_url
  #   # 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

  process :resize_to_fit => [800, 800]
  # Create different versions of your uploaded files:
  version :thumb do
    process :resize_to_fill => [200,200]
  end

  version :profile do
    process :resize_to_fill => [345,245]
  end

  version :wide do
    process :resize_to_fill => [951,245]
  end

  version :preview do
    process :resize_to_fill => [90,90]
  end

  version :small do
    process :resize_to_fill => [35,35]
  end


  # Add a white list of extensions which are allowed to be uploaded.
  # For images you might use something like this:
  def extension_white_list
     %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

在我的用户模型中,我有：

class User < ActiveRecord::Base
  mount_uploader :avatar, AvatarUploader
end

在我的用户控制器中 – 我将强化参数中的头像列入白名单.

在我的个人资料控制器强大的params我试过添加：

params.require(:profile).permit(:title, :overview, user_attributes: [:avatar])

我还尝试在我的个人资料模型中允许用户属性(如下所示)：

belongs_to :user
accepts_nested_attributes_for :user

我的视图用户文件夹中有一个部分表单.

<%= simple_fields_for :user,  html: { multipart: true } do |f| %>
  <%= f.error_notification %>
  <div class="form-inputs">
    <%= f.input :avatar, as: :file, :label => "Add a profile image (head shot)" %>
  </div>
<% end %>

部分内容包含在我的个人资料表格中.

然后我想在我的个人资料显示视图中显示用户头像：

<div class="col-md-5 col-lg-4 vc-photo" style= "background-image: url(<%= image_url @profile.user.avatar.url if @profile.user.avatar? %>);">&nbsp;</div>

但是,它只是呈现一个空白.

我试过了：

);“>

但它仍然只是呈现空白.

谁能看到我做错了什么？

当我尝试通过检查user.avatar在rails控制台中测试时,我得到了这个：

u.avatar
 => #,last_sign_in_ip：#,confirmation_token：“73abb47df224dbc3a612b46ced66e1aba …”,confirmed_at：“2016-04-02 07:13:57”,confirmation_sent_at：“2016-04-02 22:59:44”,unconfirmed_email：“testiest @ gmail.com“,failed_attempts：0,unlock_token：nil,locked_at：nil,created_at：”2016-04-02 07:13:57“,updated_at：”2016-04-02 22:59:43“,avatar：nil ,approved：false&gt ;, @ mounted_as =：avatar>

采取以下建议

我更改了表单,以便配置文件表单现在具有：

  <%= render 'users/profileimgform', f: f %>

users / profileimgform现在具有：

<%= simple_fields_for :user,  html: { multipart: true } do |ff| %>
  <%= f.error_notification %>

              <div class="form-inputs">


              <%= ff.input :avatar, as: :file, :label => "Add a profile image (head shot)" %>

              </div>


        <% end %>

我不确定是否需要在我的个人资料表格中将’ff’纳入该行.我尝试用’ff’替换最后的’f’,但是错误地询问我是否应该是单个’f’.

当我尝试这个时,控制台仍然显示user.avatar是’nil’.

最佳答案 我猜这段代码有错误：

<%= simple_fields_for :user,  html: { multipart: true } do |f| %>
  <%= f.error_notification %>
  <div class="form-inputs">
    <%= f.input :avatar, as: :file, :label => "Add a profile image (head shot)" %>
  </div>
<% end %>

看看生成的html.我认为应该是这样的：

<%= simple_form_for :profile do |f| %>
  ...
  <%= f.simple_fields_for :user do |ff| %>
    <%= ff.input :avatar %>
  <% end %>
<% end %>
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