Question

我的应用未正确加载当前登录用户或查看其他用户的帖子。我是rails的新手，并且暂时出现了这个错误。如果需要其他任何东西，请告诉我，我会得到它。

这是错误跟踪

Started GET "/feed_content" for 127.0.0.1 at 2014-09-11 10:53:14 -0700
Processing by UsersController#feed as */*
  User Load (2.0ms)  SELECT  "users".* FROM "users"  WHERE "users"."id" IS NULL
LIMIT 1
Completed 500 Internal Server Error in 9ms

NoMethodError (undefined method `tokens' for nil:NilClass):
  app/helpers/application_helper.rb:14:in `user_has_provider?'
  app/models/feed.rb:26:in `twitter_posts'
  app/models/feed.rb:17:in `posts'
  app/controllers/users_controller.rb:70:in `feed'

user_controller.rb

class UsersController < ApplicationController

def feed
  @title = "Feed"
  @user = User.find_by(id: params[:id])
  feed = Feed.new(@user)
  @providers = Providers.for(@user)
  @timeline = feed.posts(params[:twitter_pagination]) # line 70
  @unauthed_accounts = feed.unauthed_accounts
  @poster_recipient_profile_hash = feed.poster_recipient_profile_hash
  @commenter_profile_hash = feed.commenter_profile_hash

  @load_more_url = feed_content_path(
    :twitter_pagination => feed.twitter_pagination_id,
  )

  render 'show_feed'
end

feed.rb

class Feed
  include ApplicationHelper

  attr_reader :poster_recipient_profile_hash,
              :commenter_profile_hash,
              :unauthed_accounts,
              :twitter_pagination_id,

  def initialize(user)
    @user = user
    @unauthed_accounts = []
  end

  def posts(twitter_pagination_id)
    TimelineConcatenator.new.merge(twitter_posts(twitter_pagination_id))
  end

  private

  def twitter_posts(twitter_pagination_id)
    twitter_posts = []
    if user_has_provider?('twitter', @user)
      twitter_timeline = Twitter::Timeline.new(@user)
      begin
        twitter_posts = twitter_timeline.posts(twitter_pagination_id).map { |post| Twitter::Post.from(post) }
        @twitter_pagination_id = twitter_timeline.last_post_id
      rescue Twitter::Error::Forbidden, Twitter::Error::Unauthorized
        @unauthed_accounts << "twitter"
      end
      twitter_posts
    else
      twitter_posts
    end
  end

apphelper.rb

module ApplicationHelper

  def user_has_provider?(provider, user = current_user)
    @user.tokens.by_name(provider).any?
  end  
end

token.rb

class Token < ActiveRecord::Base

  validates :provider, presence: true
  validates :uid, presence: true

  belongs_to :user

  def self.by_name(name)
    where(provider: name)
  end

  def self.update_or_create_with_twitter_omniauth(id, auth)
    token = where(provider: auth["provider"], uid: auth["uid"]).first_or_initialize
    token.provider = auth["provider"]
    token.uid = auth["uid"]
    token.access_token = auth["extra"]["access_token"].token
    token.access_token_secret = auth["extra"]["access_token"].secret
    token.user_id = id
    token.save!
    token
  end

  def configure_twitter(access_token, access_token_secret)
    client = Twitter::REST::Client.new do |config|
      config.consumer_key = '**********'
      config.consumer_secret = '********'
      config.access_token = access_token
      config.access_token_secret = access_token_secret
    end
    client
  end
end

feed_index.js

FeedIndex = {

  initialize: function () {
    var reloadOk = false;

    $.get("/feed_content").success(function (response) {
      var loadingMessage = $(".loading_message");
      loadingMessage.before(response);
      loadingMessage.hide();
    }).success(function () {
      reloadOk = true
    });

    $(document).scroll(function () {
      var scrollbarPosition = $(this).scrollTop();
      var documentHeight = $(this).height();

      if (documentHeight - scrollbarPosition < 7500 && reloadOk === true) {
        $(".loading_message").show();
        var nextPageUrl = $(".load_posts_link a").attr("href");
        reloadOk = false;
        $.get(nextPageUrl).success(function (response) {
          reloadOk = true;
          $(".load_posts_link").replaceWith(response);
          $(".loading_message").hide();
        });
      }
    });

EDIT *****

的routes.rb

resources :users do
  member do
    get :following, :followers, :bio, :feed, :settings
  end
end

get '/feed_content', to: 'users#feed', as: :feed_content

Answer 1

apphelper.rb中的

def user_has_provider?(provider, user = current_user) @user.tokens.by_name(provider).any? end

我会使用params传递的用户（不带@）：user.tokens.by_name(provider).any?

Answer 2

问题是您没有定义@user变量 - 因此它显示为nil

我认为这是因为你使用的是collection路线（用于多条记录），而不是member路线（用于个别记录）：

#config/routes.rb
resources :users do
   get :feed_content, action: :feed, as: :feed_content #-> domain.com/users/:user_id/feed_count
end

这将使您能够调用以下内容：

#app/controllers/users_controller.rb
class UsersController < ApplicationController 
  def feed
    ...
    @user = User.find params[:user_id]
    ...
  end
end

此应该允许您填充@user变量，然后您就可以将该用户发送给您的帮助者。目前，您的助手正在尝试使用@user，而实际上它只需要使用传递给它的数据：

#app/helpers/application_helper.rb
class ApplicationHelper
  def user_has_provider?(provider, user = current_user)
    user.tokens.by_name(provider).any?
  end
end

多个用户的帖子未正确加载

2 个答案: