Question

Rails 3.2，Twitter App

解决方案：Can't unfollow user because of Postgres

目标是一个类似的形式。

username => User => User.id => followed_id => following? => New or Destroy Relationship

这是我现在必须关注的推特用户。

views/users/buddies.html.erb

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

users_controller.rb

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

relationships_controller.rb

    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

relationship.rb

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

user.rb

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

那样做的是：

我有4个用户：1：benben，2：nicknick，3：stevesteve，4：petepete

这些是他们的user_ids。这也是他们的追随者/编辑。

Benben可以键入“2”，然后按“nicknick”等。

我想要一个系统，我可以通过提交用户名来关注和取消关注。

所以我想象了这样......

users_controller.rb

  @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

user.rb

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

您认为有什么用？

Answer 1

您所要做的就是确保获得要与之关联的正确用户。

如果您按ID或按名称搜索，则无关紧要。如果您拥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

通过提交用户名关注Twitter用户

1 个答案: