我正在尝试使用Valums上传器来处理我的rails项目并遇到很多困难。
我目前使用标准模型和视图使用Paperclip进行非常简单的上传过程... 的模型
class User
include Mongoid::Document
include Mongoid::Paperclip
has_mongoid_attached_file :image
控制器
def avatar
@user = current_user
respond_to do |format|
format.html
end
end
#working on the updateimage method
def update
file = params[:qqfile].is_a?(ActionDispatch::Http::UploadedFile) ? params[:qqfile] : params[:file]
@user = current_user
if @user.update_attributes(params[:user])
render :text => '{"success": true}', :content_type => "application/json"
else
render :text => @user.errors.to_json, :content_type => "application/json"
end
end
查看
= form_for(@user, :as => @user, :url => '/updateimage', :html => { :method => :post, :multipart => true }) do |f|
#file-uploader
=@user.firstname
%img{:src => current_user.image}
= f.file_field :image
= f.submit
Soooooo ...... 这一切都有效，但是当我尝试使用Valums jQuery时：
$('#file-uploader').fineUploader({
debug: true,
autoSubmit: true,
allowedExtensions: ['jpg', 'jpeg', 'png', 'gif'],
sizeLimit: 1048576, // max size: 1MB
minSizeLimit: 0, // min size
multiple: false,
request: {
endpoint: '/updateimage',
paramsInBody: true
}
});
我明白了：
undefined method `update_attributes' for nil:NilClass
我很乐意让这个工作，但我对编程有点新意，所以对我来说这仍然是一个抽象的东西。我很乐意提供额外的日志信息，告诉我在哪里可以找到它。
路线
admin_index GET /admin(.:format) admin#index
POST /admin(.:format) admin#create
new_admin GET /admin/new(.:format) admin#new
edit_admin GET /admin/:id/edit(.:format) admin#edit
admin GET /admin/:id(.:format) admin#show
PUT /admin/:id(.:format) admin#update
DELETE /admin/:id(.:format) admin#destroy
orders GET /orders(.:format) orders#index
POST /orders(.:format) orders#create
new_order GET /orders/new(.:format) orders#new
edit_order GET /orders/:id/edit(.:format) orders#edit
order GET /orders/:id(.:format) orders#show
PUT /orders/:id(.:format) orders#update
DELETE /orders/:id(.:format) orders#destroy
entries GET /entries(.:format) entries#index
POST /entries(.:format) entries#create
new_entry GET /entries/new(.:format) entries#new
edit_entry GET /entries/:id/edit(.:format) entries#edit
entry GET /entries/:id(.:format) entries#show
PUT /entries/:id(.:format) entries#update
DELETE /entries/:id(.:format) entries#destroy
home_index GET /home(.:format) home#index
POST /home(.:format) home#create
new_home GET /home/new(.:format) home#new
edit_home GET /home/:id/edit(.:format) home#edit
home GET /home/:id(.:format) home#show
PUT /home/:id(.:format) home#update
DELETE /home/:id(.:format) home#destroy
avatar /avatar(.:format) home#avatar
updateimage POST /updateimage(.:format) home#update
root / home#home
root / home#index
new_user_session GET /users/sign_in(.:format) devise/sessions#new
user_session POST /users/sign_in(.:format) devise/sessions#create
destroy_user_session DELETE /users/sign_out(.:format) devise/sessions#destroy
user_omniauth_authorize /users/auth/:provider(.:format) users/omniauth_callbacks#passthru {:provider=>/facebook/}
user_omniauth_callback /users/auth/:action/callback(.:format) users/omniauth_callbacks#(?-mix:facebook)
user_password POST /users/password(.:format) devise/passwords#create
new_user_password GET /users/password/new(.:format) devise/passwords#new
edit_user_password GET /users/password/edit(.:format) devise/passwords#edit
PUT /users/password(.:format) devise/passwords#update
cancel_user_registration GET /users/cancel(.:format) users/registrations#cancel
user_registration POST /users(.:format) users/registrations#create
new_user_registration GET /users/sign_up(.:format) users/registrations#new
edit_user_registration GET /users/edit(.:format) users/registrations#edit
PUT /users(.:format) users/registrations#update
DELETE /users(.:format) users/registrations#destroy
user_confirmation POST /users/confirmation(.:format) devise/confirmations#create
new_user_confirmation GET /users/confirmation/new(.:format) devise/confirmations#new
GET /users/confirmation(.:format) devise/confirmations#show
user GET /users/:id(.:format) users#show
答案 0 :(得分：2)
更新：我认为值得尝试单独留下users#update并为文件上传创建单独的操作。
对于路由，FineUploader仅执行POST个请求，因此您必须添加新路由，因为POST请求到/users端点会触发users#create操作你想要什么。
match '/avatar', :to => 'users#avatar', :via => :post
此外，您必须在服务器端处理文件上载。 This wiki page描述了两种方法。例如，您可以使用rack-raw-upload gem并将控制器代码更改为以下内容：
def update
# this action does not handle AJAX file upload
# ...
end
def avatar
file = params[:qqfile].is_a?(ActionDispatch::Http::UploadedFile) ? params[:qqfile] : params[:file]
@user = current_user
if @user.update_attributes({ :image => file })
render :json => { :success => true }
else
render :json => { :success => false }
end
end
请注意，config/application.rb中必须有一行（如果您使用rack-raw-upload gem）：
config.middleware.use 'Rack::RawUpload'
此外，似乎paramsInBody应属于request参数：
$('#file-uploader').fineUploader({
request: {
endpoint: "/avatar",
paramsInBody: true
},
debug: true
})
最后注释：在发出AJAX请求时，必须在标头中包含CSRF令牌才能启用用户身份验证。可以通过编辑setHeaders中的fineuploader.js函数来完成 - 将以下行添加到此函数中：
xhr.setRequestHeader("X-CSRF-Token", $("meta[name='csrf-token']").attr("content"));
答案 1 :(得分：1)
如果您已发布整个路线，那么您将错过端点路线。例如：
put "/avatar" => "your_controller#update"
ps：在客户端或服务器端调整http动词（put或post）
你的update JSON输出应该是这样的（根据valums项目维基）：
if @photo.save
render json: {:success => true, :src => @photo.image.url(:thumb)}
else
render json: @photo.errors.to_json
end
答案 2 :(得分：-1)
该错误意味着您没有在响应中返回有效的JSON。有关详细信息，请参阅项目server-side readme。另一种可能是您的端点地址不正确。