Ruby on rails 通过提交用户名跟踪Twitter用户

Rails 3.2，Twitter应用程序

解决方案见：

目标是这样的一种形式

username=>User=>User.id=>following\u id=>following？=>新建或销毁关系

以下是我目前必须关注的twitter用户

views/users/buddies.html.erb

<%= form_for @relationship do |f| %>
<%= f.text_field :followed_id %>
<%= f.submit "Add" %>

relationships\u controller.rb

def buddies
@relationship =Relationship.new(params[:followed_id])

    def create
    @relationship = Relationship.new(params[:relationship])
    @relationship.follower_id = current_user.id

    if @relationship.save
        redirect_to buddies_path, notice: "Phriend added"
        else
        flash[:error] = "Phriend not added";
        redirect_to buddies_path
    end

class Relationship < ActiveRecord::Base
  attr_accessible :followed_id, :follower_id
   belongs_to :follower, class_name: "User"
   belongs_to :followed, class_name: "User"
   validates :followed_id, presence: true
   validates :follower_id, presence: true

class User < ActiveRecord::Base
  has_many :follower_relationships, class_name: "Relationship", foreign_key: "followed_id"
  has_many :followed_relationships, class_name: "Relationship", foreign_key: "follower_id" 
  has_many :followers, through: :follower_relationships
  has_many :followeds, through: :followed_relationships

  @user = User.find(params[:username])
      if @user
        if current_user.following? @user.id
          Relationship.new(params[:followed_id])
        else
          Relationship.destroy(params[:followed_id])
        end
      end

def following? user
self.followeds.include? user
end

relationship.rb

def buddies
@relationship =Relationship.new(params[:followed_id])

    def create
    @relationship = Relationship.new(params[:relationship])
    @relationship.follower_id = current_user.id

    if @relationship.save
        redirect_to buddies_path, notice: "Phriend added"
        else
        flash[:error] = "Phriend not added";
        redirect_to buddies_path
    end

class Relationship < ActiveRecord::Base
  attr_accessible :followed_id, :follower_id
   belongs_to :follower, class_name: "User"
   belongs_to :followed, class_name: "User"
   validates :followed_id, presence: true
   validates :follower_id, presence: true

class User < ActiveRecord::Base
  has_many :follower_relationships, class_name: "Relationship", foreign_key: "followed_id"
  has_many :followed_relationships, class_name: "Relationship", foreign_key: "follower_id" 
  has_many :followers, through: :follower_relationships
  has_many :followeds, through: :followed_relationships

  @user = User.find(params[:username])
      if @user
        if current_user.following? @user.id
          Relationship.new(params[:followed_id])
        else
          Relationship.destroy(params[:followed_id])
        end
      end

def following? user
self.followeds.include? user
end

因此，它的作用是：

我有4个用户：1:benben，2:nicknick，3:Steve，4:Pete

这些是他们的用户ID。这也是它们的跟随者/ed ID

Benben可以输入“2”，然后跟着“nicknick”等

我想一个系统，我可以遵循和提交用户名以下

所以我想象了这样的事情

users\u controller.rb

def buddies
@relationship =Relationship.new(params[:followed_id])

    def create
    @relationship = Relationship.new(params[:relationship])
    @relationship.follower_id = current_user.id

    if @relationship.save
        redirect_to buddies_path, notice: "Phriend added"
        else
        flash[:error] = "Phriend not added";
        redirect_to buddies_path
    end

class Relationship < ActiveRecord::Base
  attr_accessible :followed_id, :follower_id
   belongs_to :follower, class_name: "User"
   belongs_to :followed, class_name: "User"
   validates :followed_id, presence: true
   validates :follower_id, presence: true

class User < ActiveRecord::Base
  has_many :follower_relationships, class_name: "Relationship", foreign_key: "followed_id"
  has_many :followed_relationships, class_name: "Relationship", foreign_key: "follower_id" 
  has_many :followers, through: :follower_relationships
  has_many :followeds, through: :followed_relationships

  @user = User.find(params[:username])
      if @user
        if current_user.following? @user.id
          Relationship.new(params[:followed_id])
        else
          Relationship.destroy(params[:followed_id])
        end
      end

def following? user
self.followeds.include? user
end

user.rb

def buddies
@relationship =Relationship.new(params[:followed_id])

    def create
    @relationship = Relationship.new(params[:relationship])
    @relationship.follower_id = current_user.id

    if @relationship.save
        redirect_to buddies_path, notice: "Phriend added"
        else
        flash[:error] = "Phriend not added";
        redirect_to buddies_path
    end

class Relationship < ActiveRecord::Base
  attr_accessible :followed_id, :follower_id
   belongs_to :follower, class_name: "User"
   belongs_to :followed, class_name: "User"
   validates :followed_id, presence: true
   validates :follower_id, presence: true

class User < ActiveRecord::Base
  has_many :follower_relationships, class_name: "Relationship", foreign_key: "followed_id"
  has_many :followed_relationships, class_name: "Relationship", foreign_key: "follower_id" 
  has_many :followers, through: :follower_relationships
  has_many :followeds, through: :followed_relationships

  @user = User.find(params[:username])
      if @user
        if current_user.following? @user.id
          Relationship.new(params[:followed_id])
        else
          Relationship.destroy(params[:followed_id])
        end
      end

def following? user
self.followeds.include? user
end

---

你认为什么会起作用？

你所要做的就是确保你找到了你想要联系的正确用户

无论您是按id还是按名称搜索，这都不重要。如果您有该用户的活动记录，则只需连接对象即可轻松关联

#find by whatever params float your boat
@user = User.find(params[:user])
#add the user to the list of followers
current_user.followers << @user
current_user.save

#or you could delete
@lame_follower = current_user.followers.find(1)
@lame_follower.destroy

#通过任何参数找到你的船
@user=user.find（参数[：user]）
#将用户添加到关注者列表
顺便说一句，你的命名惯例让我很烦恼，我无法尝试遵循。但如果你需要更多的澄清，或者我只是错过了你的问题，请让我知道。这样我可能知道的比我实际知道的更多。在这个应用程序中，我违反了很多规则，所以我觉得这不会起作用。我经常找不到没有ID的用户。不用担心。这就是我们来这里学习的原因。作为响应，您无法找到没有ID的用户。您是否正在检查是否将任何内容打印到日志中，以了解发生这种情况的原因？尝试使用logger.debug（@user.inspect）。我很好奇你是否能从中获得一些见解。哦，伙计，准备好了，否则你的脑袋会被炸飞的。您通常应该将记录器代码放在控制器中，因为应用程序的大部分逻辑都应该存在于控制器中。我的头脑还没有崩溃，但我已经明白了！几乎，我可以通过用户名跟踪用户，但当我尝试取消跟踪时，我得到了这个<代码>未知键：follower\u id app/models/user.rb:34:在unfollow app/controllers/users\u controller.rb:21:在buddies中