Rails：在視圖中顯示待處理的朋友請求

Question

如果當前用戶請求了用戶，或者當前用戶已被他們請求，我試圖讓用戶索引中的用戶旁邊出現Pedning Request字樣。我有一種感覺，我的呃，或者我只是完全錯誤的做法。當我點擊添加朋友鏈接時，我希望它重新引導到索引頁面，並且具有更新的請求狀態，但它仍然顯示添加朋友鏈接。

index.html.erb 

Facebook Users: 
<ul><% @users.each do |user| %> 

    <% if current_user == user || current_user.friends.include?(user) %> 
     <li><%= link_to user.email, user_path(user) %></li> 
<% current_user.friend_requests.each do |request| %> 
    <% if request.friend_id == user.id %> 
    <li><%= link_to user.email, user_path(user) %> 
     | Pending Request</li> 
     <% end %> 
     <% end %> 
    <% else %> 
     <li><%= link_to user.email, user_path(user) %> | 
     <%= link_to "Add Friend", friend_requests_path(friend_id: user.id), method: :post %> 
     </li> 
    <% end %> 
<% end %> 
</ul> 

<%= link_to 'Back to your profile', user_path(current_user) %> 


<%= render 'shared/error_messages', object: current_user %> 

<%= params.inspect %> 

---

class FriendRequestsController < ApplicationController 
before_action :set_friend_request, except: [:index, :create] 

def index 
    @incoming = FriendRequest.where(friend: current_user) 
    @outgoing = current_user.friend_requests 
end 

def create 
    @user = User.find(current_user) 
    @friend = User.find(params[:friend_id]) 
    @friend_request = current_user.friend_requests.new(friend_id: @friend.id) 

    if @friend_request.save 
     flash[:notice] = "Friend request sent!" 
     redirect_to users_path 
    else 
     flash[:notice] = "Unable to request friend" 
     redirect_to users_path 
    end 
end 

def update 
    friend_email = User.find(@friend_request.friend_id).email 

    @friend_request = FriendRequest.find_by_user_id_and_friend_id(params[:friend_id], params[:id]) 
    if @friend_request.accept 
     flash[:notice] = "You and #{friend_email} are now friends!" 
     redirect_to user_path(current_user) 
    end 

end 

def destroy 
    if @friend_request.destroy 
     flash[:notice] = "Request Declined" 
     redirect_to user_path(current_user) 
    end 
end 


private 

def set_friend_request 
    @friend_request = FriendRequest.find_by_user_id_and_friend_id(params[:friend_id], params[:id]) 
end 
end 

Answer 1

的if塊開始...

<% if request.friend_id == user.id %> 

...是裏面的 '如果' 塊開始...

<% if current_user == user || current_user.friends.include?(user) %> 

所以基本上只有當用戶是喲時才能顯示「待處理的請求」自己（當前用戶）或者用戶已經是你的朋友。當然，這沒有意義。

不如第一if後移動代碼的else，你並不真的需要遍歷所有each的要求，只是映射friend_id的

<ul> 
<% @users.each do |user| %> 
    <% if current_user == user || current_user.friends.include?(user) %> 
    <li><%= link_to user.email, user_path(user) %></li> 
    <% else %> 
    <% if current_user.friend_requests.pluck(:friend_id).include? user.id %> 
     <li><%= link_to user.email, user_path(user) %> 
      | Pending Request</li> 
    <% else %> 
     <li><%= link_to user.email, user_path(user) %> | 
     <%= link_to "Add Friend", friend_requests_path(friend_id: user.id), method: :post %> 
     </li> 
    <% end %> 
    <% end %> 
<% end %> 
</ul>