用葡萄和回形针上传文件

时间:2012-12-28 09:13:59

标签: ruby ruby-on-rails-3 api paperclip

我正在开发一个REST API,尝试上传用户的图片

  • grape微框架
  • paperclip gem,但它不起作用,显示此错误
  • rails版本是3.2.8

No handler found for #<Hashie::Mash filename="user.png" head="Content-Disposition: form-data; name=\"picture\"; filename=\"user.png\"\r\nContent-Type: image/png\r\n" name="picture" tempfile=#<File:/var/folders/7g/b_rgx2c909vf8dpk2v00r7r80000gn/T/RackMultipart20121228-52105-43ered> type="image/png">

我尝试使用控制器测试回形针,但是当我尝试通过葡萄api上传它不起作用我的帖子标题是multipart / form-data

我上传的代码是

 user = User.find(20) 
 user.picture = params[:picture] 
 user.save! 

因此,如果无法通过葡萄上传文件,还有其他方法可以通过REST api上传文件吗?

4 个答案:

答案 0 :(得分:16)

@ ahmad-sherif解决方案可以正常运行,但是你可以放弃original_filename(和扩展名),并且可以为探测器提供预处理器和验证器。您可以像这样使用ActionDispatch::Http::UploadedFile

  desc "Update image"
  params do
    requires :id, :type => String, :desc => "ID."
    requires :image, :type => Rack::Multipart::UploadedFile, :desc => "Image file."
  end
  post :image do
    new_file = ActionDispatch::Http::UploadedFile.new(params[:image])
    object = SomeObject.find(params[:id])
    object.image = new_file
    object.save
  end

答案 1 :(得分:8)

也许更一致的方法是为Hashie :: Mash定义回形针适配器

module Paperclip
  class HashieMashUploadedFileAdapter < AbstractAdapter

    def initialize(target)
      @tempfile, @content_type, @size = target.tempfile, target.type, target.tempfile.size
      self.original_filename = target.filename
    end

  end
end

Paperclip.io_adapters.register Paperclip::HashieMashUploadedFileAdapter do |target|
  target.is_a? Hashie::Mash
end

并使用它&#34;透明&#34;

 user = User.find(20) 
 user.picture = params[:picture] 
 user.save! 

已添加到维基 - https://github.com/intridea/grape/wiki/Uploaded-file-and-paperclip

答案 2 :(得分:2)

您可以传递File中的params[:picture][:tempfile]对象,因为Paperclip获得了File个对象的适配器,就像这样

user.picture = params[:picture][:tempfile]
user.picture_file_name = params[:picture][:filename] # Preserve the original file name

答案 3 :(得分:0)

对于Rails 5.1用户来说,这也应该做:

/您的/端点/路径

params do
  required :avata, type: File
end

users_spec.rb

describe 'PATCH /users:id' do
  subject { patch "/api/users/#{user.id}", params: params }

  let(:user) { create(:user) }
  let(:params) do
    {
      avatar: fixture_file_upload("spec/fixtures/files/jpg.jpg", 'image/jpeg')
    }
  end

  it 'updates the user' do
    subject      
    updated_user = user.reload
    expect(updated_user.avatar.url).to eq(params[:avatar])
  end
end