Question

当我点击链接＆＃34;添加朋友＆＃34;时，会生成2个相同的记录。只应创建一条记录。我已经尝试了不同的方式链接到create方法，因为它可能是潜在的问题。

查看：users / index

<ul>
  New friend requests
  <% @incoming.each do |user| %>
  <% @users.each do |f| %>
  <% if f.id == user.user.id %>
  <li>
    <%= f.name %>
    <%= link_to "Accept request", friend_request_path(id: user), :method => :put %>
  </li>
  <% end %>
  <% end %>
  <% end %>
</ul>

<ul>
    All users
  <% @users.each do |user| %>
  <% if user.id != current_user.id %>
  <li><%= user.name %>
   <%= link_to "Add Friend", friend_requests_path(:friend_id => user), :method => :post %></li>
   <% end %>
   <% end %>

 </ul>

控制器：

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

        if @friend_request.save
            flash[:notice]="Friend request sent."
            redirect_to users_path
        else
            flash[:alert]="Friend request not sent."
            redirect_to root_path
        end
    end

    def update
        @friend_request.accept
        flash[:notice]="Friend added!"
        redirect_to root_path
    end

    def destroy
        @friend_request.destroy
        head :no_content
    end


    private

    def set_friend_request
        @friend_request = FriendRequest.find(params[:id])
    end
end

日志：

Started POST "/friend_requests?friend_id=2" for 127.0.0.1 at 2017-12-13 23:55:26 -0500
Processing by FriendRequestsController#create as HTML
  Parameters: {"authenticity_token"=>"+bCpezt22p+Jt3fmdbb66tIUrSJgsyfTpLbY2WHsZo9DAfwV+hxEr6GRU7nwESTPX6Oqz56GuikiG+qhjFhVcQ==", "friend_id"=>"2"}
  User Load (0.6ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 2], ["LIMIT", 1]]
  User Load (0.7ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2  [["id", 1], ["LIMIT", 1]]
   (0.4ms)  BEGIN
Started POST "/friend_requests?friend_id=2" for 127.0.0.1 at 2017-12-13 23:55:26 -0500
Processing by FriendRequestsController#create as HTML
  SQL (4.3ms)  INSERT INTO "friend_requests" ("user_id", "friend_id", "created_at", "updated_at") VALUES ($1, $2, $3, $4) RETURNING "id"  [["user_id", 1], ["friend_id", 2], ["created_at", "2017-12-14 04:55:26.660451"], ["updated_at", "2017-12-14 04:55:26.660451"]]
  Parameters: {"authenticity_token"=>"+bCpezt22p+Jt3fmdbb66tIUrSJgsyfTpLbY2WHsZo9DAfwV+hxEr6GRU7nwESTPX6Oqz56GuikiG+qhjFhVcQ==", "friend_id"=>"2"}
   (8.3ms)  COMMIT
Redirected to http://localhost:3000/users
Completed 302 Found in 64ms (ActiveRecord: 14.3ms)


  User Load (1.1ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 2], ["LIMIT", 1]]
  User Load (1.0ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2  [["id", 1], ["LIMIT", 1]]
   (2.8ms)  BEGIN
  SQL (2.8ms)  INSERT INTO "friend_requests" ("user_id", "friend_id", "created_at", "updated_at") VALUES ($1, $2, $3, $4) RETURNING "id"  [["user_id", 1], ["friend_id", 2], ["created_at", "2017-12-14 04:55:26.698180"], ["updated_at", "2017-12-14 04:55:26.698180"]]
   (2.5ms)  COMMIT
Redirected to http://localhost:3000/users
Completed 302 Found in 39ms (ActiveRecord: 18.7ms)

Answer 1

JS被加载到我的应用程序中两次。从我的application.js文件中删除这些行只导致一个请求。

移除：

//= require turbolinks
//= require rails-ujs
//= require_tree .

电流：

//= require jquery
//= require jquery.turbolinks
//= require jquery_ujs
//= require bootstrap/dropdown

create method创建2条记录而不是一条记录？

1 个答案: