我正在尝试使用回形针创建 URL 上传。
我已遵循此指南:http://trevorturk.com/2008/12/11/easy-upload-via-url-with-paperclip/
问题是当我使用 image_url 字段时没有上传任何内容。我知道我的代码不是很干,因此如果有人有一些重写代码的技巧,那就太好了。
我有 2 个附加图像,因此有 2 个图像 URL。
我的 konkurrancers 表:
photo_file_name varchar(255)
photo_content_type varchar(255)
photo_file_size int(11)
photo_updated_at datetime
photo2_file_name varchar(255)
photo2_content_type varchar(255)
photo2_file_size int(11)
photo2_updated_at datetime
image_remote_url varchar(255)
image_remote_url_2 varchar(255)
我的 konkurrancer 模型:
class Konkurrancer < ActiveRecord::Base
has_attached_file :photo,
:url => "/public/images/billeder/photo/:id/:basename.:extension",
:path => ":rails_root/public/images/billeder/photo/:id/:basename.:extension"
has_attached_file :photo2,
:url => "/public/images/billeder/photo2/:id/:basename.:extension",
:path => ":rails_root/public/images/billeder/photo2/:id/:basename.:extension"
before_validation :download_remote_image, :if => :image_url_provided?
before_validation :download_remote_image_2, :if => :image_url_2_provided?
validates_presence_of :image_remote_url, :if => :image_url_provided?, :message => 'is invalid or inaccessible'
validates_presence_of :image_remote_url_2, :if => :image_url_2_provided?, :message => 'is invalid or inaccessible'
private
def image_url_provided?
!self.image_url.blank?
end
def image_url_2_provided?
!self.image_url_2.blank?
end
def download_remote_image
self.photo = do_download_remote_image
self.image_remote_url = image_url
end
def download_remote_image_2
self.photo2 = do_download_remote_image_2
self.image_remote_url_2 = image_url_2
end
def do_download_remote_image
io = open(URI.parse(image_url))
def io.original_filename; base_uri.path.split('/').last; end
io.original_filename.blank? ? nil : io
rescue # catch url errors with validations instead of exceptions (Errno::ENOENT, OpenURI::HTTPError, etc...)
end
def do_download_remote_image_2
io = open(URI.parse(image_url_2))
def io.original_filename; base_uri.path.split('/').last; end
io.original_filename.blank? ? nil : io
rescue # catch url errors with validations instead of exceptions (Errno::ENOENT, OpenURI::HTTPError, etc...)
end
end
我的 Controller 创建操作:
def create
@konkurrancer = Konkurrancer.new(params[:konkurrancer])
respond_to do |format|
if @konkurrancer.save
format.html { redirect_to(:admin_konkurrancers, :notice => 'Konkurrancer was successfully created.') }
format.xml { render :xml => :admin_konkurrancers, :status => :created, :location => @konkurrancer }
else
format.html { render :action => "new" }
format.xml { render :xml => @konkurrancer.errors, :status => :unprocessable_entity }
end
end
end
我的表格:
<%= simple_form_for [:admin, @konkurrancer], :html => { :multipart => true } do |f| %>
<%= f.label :upload_125x125 %>
<%= f.file_field :photo, :label => '125x125', :style => 'width:250;' %>
<%= f.input :image_url_2, :label => 'URL 125x125', :style => 'width:250;' %>
<%= f.label :upload_460x60 %>
<%= f.file_field :photo2, :label => '460x58', :style => 'width:250;' %>
<%= f.button :submit, :value => 'Create konkurrence' %>
<% end %>
最佳答案
在最新版本的 paperclip 中(拉取请求已合并,但我不确定是否发布)paperclip > 3.1.3(也许 3.2 即将推出;也许 3.1.4)这变得更加容易。
self.photo = URI.parse("http://something.com/blah/image.png")
上面应该处理下载/临时文件内容/文件名和文件内容类型。
享受吧! :)
关于ruby-on-rails - Rails 回形针 URL 上传问题及如何使其 DRY,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/6180808/