Question

我使用rails 4和paperclip 4.2.1进行了以下设置

class Post< ActiveRecord::Base
  has_attached_file :key
  allowed_content_type = ['text/plain',
'text/rtf', 
'text/richtext',
'application/txt',
'application/octet-stream']
  validates_attachment_content_type :key, :content_type => allowed_content_type, :message=> "Only #{allowed_content_type} is allowed"

我在我的application.rb

中有这个

<body data-controller="<%= controller.controller_path %>" data-action="<%= controller.action_name %>" data-no-turbolink="true">
  <%= content_tag "div", id: "params", data: { params: params } do %>
  <% end %>

后置控制器很简单

  def update
  Post.transaction do
      @post.attributes = (artifact_params)
        if @artifact.errors.blank?
        redirect_to(@artifact, :notice => 'Evidence item updated successfully')
      else
        render :action => 'edit'
        raise ActiveRecord::Rollback
      end

它与所有其他文件类型完美配合。我尝试二进制文件时出错。这是错误：

帖子中的

编码:: UndefinedConversionError＃update

app / views / layouts / application.html.erb第58行引出：

56: <body data-controller="<%= controller.controller_path %>" data-action="<%= 
57: controller.action_name %>" data-no-turbolink="true">
58: <%= content_tag "div", id: "params" , data: { params: params } do %>
59: <%#= params.inspect %>
60: <% end %>

在日志中说：

ActionView::Template::Error ("\xAD" from ASCII-8BIT to UTF-8):
    55: </head>
    56: 
    57: <body data-controller="<%= controller.controller_path %>" data-action="<%= controller.action_name %>" data-no-turbolink="true">
    58:   <%= content_tag "div", id: "params" , data: { params: params } do %>
    59:     <%#= params.inspect %>
    60:   <% end %>
    61:   
  app/views/layouts/application.html.erb:58:in `_app_views_layouts_application_html_erb__387563064_102572910'
  app/controllers/posts_controller.rb:978:in `block in update'
  app/controllers/posts_controller.rb:790:in `update'
 Rendered /home/adminuser/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.0/lib/action_dispatch/middleware/templates/rescues/_source.erb (15.0ms)
  Rendered /home/adminuser/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.0/lib/action_dispatch/middleware/templates/rescues/_trace.html.erb (7.1ms)
  Rendered /home/adminuser/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.0/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb (1.9ms)
  Rendered /home/adminuser/.rvm/gems/ruby-2.1.1/gems/actionpack-4.2.0/lib/action_dispatch/middleware/templates/rescues/template_error.html.erb within rescues/layout (47.8ms)
Cannot render console with content type multipart/form-dataAllowed content types: [#<Mime::Type:0xa835748 @synonyms=["application/xhtml+xml"], @symbol=:html, @string="text/html">, #<Mime::Type:0xa835608 @synonyms=[], @symbol=:text, @string="text/plain">]

Answer 1

花了一整天的时间，我发现这是由回形针中的错误引起的。如果没有将二进制文件映射到application / octet-stream，则在尝试将params转换为视图正文中的json字符串时会产生此错误。您必须将任何二进制文件类型映射到application / octet-stream才能消除此错误。

1.在config / initializers /中创建paperclip.rb 2.在config / initializers / paperclip.rb中输入以下代码：

Paperclip.options[:content_type_mappings] = {
  tc: 'application/octet-stream'
}

其中tc是二进制文件的扩展名。如果您有一个没有扩展名的文件，我不知道这将如何工作。回形针拥有者应该清楚地记录下来以减轻用户的痛苦。

Rails 4，Paperclip 4.2.1在二进制文件上传时出错

1 个答案: