Question

我正在浏览Treehouse的互助友谊视频。我遇到的问题是，当用户点击“接受友谊”按钮时，会显示一条Flash消息，说明他们现在是我的朋友。但是，它不会在用户的“朋友”页面上更新。它仍然显示用户有“请求友谊”并接受它。不知怎的，它没有更新。

它表明友谊始于我，但它不会为其他用户更新。它仍然表示此人有友谊请求。请参阅下面的代码。先感谢您。

我不确定这是否与 mutual_friendship.update_attribute（：state，'accepted'）

有关

User_Friendship Model

class UserFriendship < ActiveRecord::Base
  belongs_to :user
  belongs_to :friend, class_name: 'User', foreign_key: 'friend_id'

   state_machine :state, initial: :pending do

    after_transition on: :accept, do: [:send_acceptance_email, :accept_mutual_friendship!]

    state :requested

    event :accept do
        transition any => :accepted
    end
  end

  def self.request(user1, user2)
    transaction do
        friendship1 = create!(user: user1, friend: user2, state: 'pending')
        friendship2 = create!(user: user2, friend: user1, state: 'requested')

        friendship1.send_request_email
        friendship1
    end    
  end


 def send_request_email
    UserNotifier.friend_requested(id).deliver
 end

 def send_acceptance_email
    UserNotifier.friend_request_accepted(id).deliver
 end

 def mutual_friendship
 self.class.where({user_id: friend_id, friend_id: user_id}).first
 end

  def accept_mutual_friendship!
  # Grab the mutual friendship and update the state without using the state machine, so as
  # not to invoke callbacks.
  mutual_friendship.update_attribute(:state, 'accepted')
  end 
end

UserFriendship Controller

class UserFriendshipsController < ApplicationController
 before_filter :authenticate_user!

  def index
  @user_Friendships = current_user.user_friendships.all
  end   

 def accept
  @user_friendship = current_user.user_friendships.find(params[:id])
  if @user_friendship.accept_mutual_friendship!
  flash[:success] = "You are now friends with #{@user_friendship.friend.name}"
  redirect_to user_friendships_path
 else
  flash[:error] = "That friendship could not be accepted"
  redirect_to user_friendships_path
  end
end

 def new
 if params[:friend_id]
   @friend = User.find(params[:friend_id])
   raise ActiveRecord::RecordNotFound if @friend.nil?
    @user_friendship = current_user.user_friendships.new(friend: @friend)
 else
  flash[:error] = "Friend required"
  end
  rescue ActiveRecord::RecordNotFound
  render file: 'public/404', status: :not_found
 end

  def create
  if params[:user_friendship] && params[:user_friendship].has_key?(:friend_id)
  @friend = User.find(params[:user_friendship][:friend_id])
  @user_friendship = UserFriendship.request(current_user, @friend)
  if @user_friendship.new_record?
    flash[:error] = "There was a problem creating this friend request."
  else
    flash[:success] = "Friend request sent."
  end
  redirect_to user_path(@friend)
 else
  flash[:error] = "Friend required"
  redirect_to root_path
   end
 end

def edit
@user_friendship = current_user.user_friendships.find(params[:id])
@friend = @user_friendship.friend
end

 def user_friendship
  params.require(:user_friendship).permit(:user_id, :friend_id, :user, :friend, :state, :user_friendship)
  end    
 end

用户/索引

<div class="page-header">
<h1> Friends </h1>
</div>
   <% @user_Friendships.each do |friendship| %>
          <% friend = friendship.friend %>
      <div id="<%= dom_id(friendship) %>" class="friend row">
       <div class="span1">

       </div>
       <div class="span7">
         <strong><%= friend.name %></strong><br />
            <%if friendship.pending? %>
            <em>Friendship is pending.</em> <%=link_to "Delete request", edit_user_friendship_path(friendship) %>.
            <% end %>
            <% if friendship.requested? %>
                <em>Friendship requested.</em> <%=link_to "Accept Friendship", edit_user_friendship_path(friendship) %>.
            <% end %>
            <% if friendship.accepted? %>
                <em>Friendship started <%= friendship.updated_at %>.</em> <%= link_to "Update friendship", edit_user_friendship_path(friendship) %>.
            <% end %>
           </div>
       </div>
   <% end %>

Answer 1

是的，确实，它与

有关

mutual_friendship.update_attribute(:state, 'accepted')

当您执行

时，您将在UserFriendship表中创建两个条目

    friendship1 = create!(user: user1, friend: user2, state: 'pending')
    friendship2 = create!(user: user2, friend: user1, state: 'requested')

但您只是在接受请求时更新其中一个。

我在控制器中的accept方法中添加了一行来解决问题...尝试一下，让我知道它是否有效

def accept
  @user_friendship = current_user.user_friendships.find(params[:id])
  @user_friendship.accept_mutual_friendship!
  @user_friendship.friend.user_friendships.find_by(friend_id: current_user.id).accept_mutual_friendship!
  flash[:success] = "You are now friends with #{@user_friendship.friend.name}"
  redirect_to user_friendships_path
end

接受友谊没有更新（相互友谊）

1 个答案: