能夠顯示所有活動，但無法僅顯示跟隨用戶的活動。未定義的方法

Question

我遵循Michael Hartl的Rails Tutorial來實現類似於Twitter的跟蹤系統（railstutorial.org）。目前，我希望使用此跟隨者系統僅顯示用戶當前登錄的用戶的活動。我可以在/ activities頁面上顯示系統中的所有活動，而不會出現任何問題。活動控制器代碼的工作原理如下：

class ActivitiesController < ApplicationController 
    def index 
    @activities = PublicActivity::Activity.all 
    end 
end 

活動控制器的索引頁列出了所有用戶發佈的所有帖子。但是，我想編輯控制器代碼以僅顯示跟隨用戶的活動。我怎樣才能做到這一點？我所有的嘗試都沒有導致方法錯誤。以下是相關內容：

用戶模式：

class User < ActiveRecord::Base 
    # Include default devise modules. Others available are: 
    # :token_authenticatable, :confirmable, 
    # :lockable, :timeoutable and :omniauthable 
    devise :database_authenticatable, :registerable, 
     :recoverable, :rememberable, :trackable, :validatable 

    # Setup accessible (or protected) attributes for your model 
    attr_accessible :email, :password, :password_confirmation, :remember_me, :first_name, :last_name, :title, :location, :aboutme, :works_attributes 
    # attr_accessible :title, :body 

    validates_presence_of :first_name, :last_name 
    validates_uniqueness_of :first_name, :last_name, :email, :case_sensitive => false 

    has_many :works, dependent: :destroy 
    accepts_nested_attributes_for :works 

    has_many :relationships, foreign_key: "follower_id", dependent: :destroy 
    has_many :followed_users, through: :relationships, source: :followed 

    has_many :reverse_relationships, foreign_key: "followed_id", 
            class_name: "Relationship", 
            dependent: :destroy 
    has_many :followers, through: :reverse_relationships, source: :follower 

    has_many :posts, dependent: :destroy 

    def full_name 
    [first_name, last_name].join(" ") 
    end 

    def following?(other_user) 
    relationships.find_by_followed_id(other_user.id) 
    end 

    def follow!(other_user) 
    relationships.create!(followed_id: other_user.id) 
    end 

    def unfollow!(other_user) 
    relationships.find_by_followed_id(other_user.id).destroy 
    end 
end 

關係模型：

class Relationship < ActiveRecord::Base 
    attr_accessible :followed_id, :follower_id 

    belongs_to :follower, class_name: "User" 
    belongs_to :followed, class_name: "User" 

    validates :follower_id, presence: true 
    validates :followed_id, presence: true 
end 

用戶控制器

class UsersController < ApplicationController 


def index 
    @users = User.all 

respond_to do |format| 
    format.html # index.html.erb 
    format.xml { render :xml => @users } 
end 
end 
    def show 
    @user = User.find(params[:id]) 
    @posts = @user.posts.all 
    @works = @user.works.all 
    respond_to do |format| 
     format.html # show.html.erb 
     format.xml { render :xml => @user } 
    end 
    end 
    def following 
    @title = "Following" 
    @user = User.find(params[:id]) 
    @users = @user.followed_users.all 
    render 'show_follow' 
    end 

    def followers 
    @title = "Followers" 
    @user = User.find(params[:id]) 
    @users = @user.followers.all 
    render 'show_follow' 
    end 

    def posts 
    @user = User.find(params[:id]) 
    @posts = @user.posts.all 
    render 'show_post' 
    end 
end 

關係控制器

階級關係hipsController < ApplicationController

def create 
    @user = User.find(params[:relationship][:followed_id]) 
    current_user.follow!(@user) 
    respond_to do |format| 
     format.html { redirect_to @user } 
     format.js 
    end 
    end 

    def destroy 
    @user = Relationship.find(params[:id]).followed 
    current_user.unfollow!(@user) 
    respond_to do |format| 
     format.html { redirect_to @user } 
     format.js 
    end 
    end 
end 

我一直在這個問題上停留太久。任何幫助將不勝感激。如果您需要更多信息，請隨時提問。

如何編輯活動控制器以便顯示跟隨用戶的活動？

**編輯：它的作品！

Answer 1

聲明：我不知道該public_activity寶石什麼的，但這裏是文檔建議你需要做的：

1. Set the "owner" attribute on your activities.

2. 篩選您展示活動：PublicActivity::Activity.where(owner_type: "User", owner_id: current_user.followed_users.map {|u| u.id}).all（此是基於this sample code.）