代码之家 › 专栏 › 技术社区 › Shripad Krishna

获取当前用户是否需要相应的视图?

authlogic session-state session ruby-on-rails

Shripad Krishna · 技术社区 · 14 年前

在我的控制器中,我有一个没有相应视图的动作。准确地说:上传图片的上传动作。但是,我需要当前用户id来存储图像url。但是当前的用户方法总是返回nil,因为操作本身没有视图。在这种情况下,如何获取当前用户?我正在使用authlogic。我的应用程序\u controller.rb包含以下内容:

class ApplicationController < ActionController::Base

  helper :all
  helper_method :current_user_session, :current_user
  filter_parameter_logging :password, :password_confirmation
  protect_from_forgery

  def correct_safari_and_ie_accept_headers
    ajax_request_types = [ 'application/json', 'text/javascript', 'text/xml']
    request.accepts.sort!{ |x, y| ajax_request_types.include?(y.to_s) ? 1 : -1 } if request.xhr?
  end

  private
    def set_cache_buster
       response.headers["Cache-Control"] = "no-cache, no-store, max-age=0, must-revalidate"
       response.headers["Pragma"] = "no-cache"
       response.headers["Expires"] = "Fri, 01 Jan 1990 00:00:00 GMT"
    end

    def current_user_session
      return @current_user_session if defined?(@current_user_session)
      @current_user_session = UserSession.find
    end

    def current_user
      return @current_user if defined?(@current_user)
      @current_user = current_user_session && current_user_session.record
    end
end

current_user 助手方法。只有 upload 行动是不可能的。代码:

控制器:

class ImageStacksController < ApplicationController
 def upload
    # Using swfupload.

    image_stack_params = { 
      :caption => params[:caption], 
      :swf_uploaded_data => params[:link]
      }

    # current_user returns nil, even with user logged in!!
    # Occurs only in the upload action and no other action in this controller.
    logger.info("Current User: #{current_user}") #Returns nil
    @image_stack = current_user.image_stacks.create! image_stack_params


      respond_to do |format|
        format.js { render :json => @image_stack }
      end
  end

  def edit
   logger.info("Current User: #{current_user}") #Returns current user
  end

  def new
   logger.info("Current User: #{current_user}") #Returns current user
  end

  def update
   logger.info("Current User: #{current_user}") #Returns current user
  end

  def destroy
   logger.info("Current User: #{current_user}") #Returns current user
  end
 end

型号:

class ImageStack < ActiveRecord::Base
  belongs_to :user, :class_name => "User", :foreign_key => "user_id"

  upload_image_to_s3 :link

  def swf_uploaded_data=(data)
      data.content_type = MIME::Types.type_for(data.original_filename)
      self.link = data
  end  
end

1 回复 | 直到 14 年前

mark 14 年前

控制器方法实际上就是,类方法。它不需要视图。我使它成为一个私有方法这个方法在类或从它继承的其他类之外是不可用的,因此它对视图是不可用的。您的问题表明您的用户未登录或其他错误。您是否有require\u user方法?

#application_controller
private

def require_user
  unless current_user
    store_location
    flash[:notice] = t(:must_be_logged_in)
    redirect_to user_login_path
    return false
  end
end

def store_location
  session[:return_to] = request.request_uri
end

#user.rb
has_many :images

#image.rb
belongs_to :user    

# image_controller.rb
before_filter :require_user

def create
  @photo = @item.images.new(:photo => params[:photo],  :user => current_user)

您当前的用户方法是已继承的ApplicationController方法:

ImageStacksController < ApplicationController

这是:

helper_method :current_user_session, :current_user

upload操作和其他操作的区别在于update是由javascript调用的。我记得做了一个类似的上传和必须通过的真实性令牌。日志中还有什么其他记录吗?

这可能对您有用: http://github.com/JimNeath/swfupload---paperclip-example-app

- content_for :head do
  = javascript_tag "var AUTH_TOKEN = #{form_authenticity_token.inspect};" if protect_against_forgery?

现在,您将字段添加到swflupload,方法与添加当前用户的方法相同。