我的UserFriendship创建操作不保存user_id和friend_id [英] My UserFriendship create action does not save user_id and friend_id

问题描述

我使用'state_machine'gem。
一旦我创建一个新的UserFriendship，user_id和friend_id不保存。我甚至尝试通过传递user_id和friend_id直接在控制台中手动创建友谊，但仍然这些两个变量不保存即使友谊在数据库中创建，朋友和用户不保存。

UserFriendship模型：

  class UserFriendship< ActiveRecord :: Base 
 belongs_to：user 
 belongs_to：friend，class_name：'User'，foreign_key：'friend_id'
 
 attr_accessor：user，：friend，：user_id，：friend_id ，：state 
 
 after_destroy：delete_mutual_friendship！ 
 
 
 state_machine：state，initial：：pending do 
 
 after_transition on：：accept，do：[：send_acceptance_email，：accept_mutal_friendship！] 
 
 state：requested 
 event：accept do 
 transition any => ：accepted 
 end 
 end 
 
 
 def self.request（user1，user2）
 transaction do 
 friendship1 = UserFriendship.create！ user_id：user1.id，friend_id：user2.id，state：'pending'）
 friendship2 = UserFriendship.create！（user_id：user2.id，friend_id：user1.id，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_mutal_friendship！ 
 
 mutual_friendship.update_attribute（：state，'accepted'）
 end 
 
 def delete_mutual_friendship！ 
 mutual_friendship.delete 
 end 
  

用户模型

  class User< ActiveRecord :: Base 
 has_many：user_friendships 
 has_many：friends， - > {where（user_friendships：{state：accepted}）}，通过：：user_friendships 
 has_many：pending_user_friendships， - > {where state：pending}，class_name：'UserFriendship'，foreign_key：：user_id 
 has_many：pending_friends，through：：pending_user_friendships，source：：friend 
  

UserFrienships控制器

  UserFriendshipsController< ApplicationController 
 before_filter：authenticate_user！ 
 
 def accept 
 @user_friendship = current_user.user_friendships.find（params [：id]）
如果@ user_friendship.accept！ 
 flash [：success] =您现在是#{@user_friendship.friend.name}的朋友
 else 
 flash [：error] =无法接受友谊
 end 
 redirect_to user_friendships_path 
 end 
 def new 
 if params [：friend_id] 
 @friend = User.find（params [：friend_id]）
 @user_friendship = current_user.user_friendships.new（friend：@friend）
 raise ActiveRecord :: RecordNotFound if @ friend.nil？ 
 
 else 
 flash [：error] =需要朋友
 end 
 
救援ActiveRecord :: RecordNotFound 
渲染文件：'public / 404'，status：：not_found 
 end 
 
 def create 
 
如果params [：user_friendship]&& params [：user_friendship] .has_key？（：friend_id）
 @friend = User.find_by（id：params [：user_friendship] [：friend_id]）
 @user_friendship = UserFriendship.request（current_user，@friend ）
 
 
如果@ user_friendship.new_record？ 
 flash [：error] =创建该朋友请求时出现问题。 
 
 else 
 
 flash [：sucess] =朋友请求已发送
 
 end 
 redirect_to current_user 
 else 
 flash [：error] =需要朋友
 redirect_to root_path 
 end 
 end 
 
 def index 
 @user_friendships = current_user.user_friendships.all 
 end 
 
 
 def edit 
 @user_friendship = current_user.user_friendships.find（params [：id]）
 @friend = @ user_friendship.friend 
 end 
 
 def destroy 
 @user_friendship = current_user.user_friendships.find（params [：id]）
如果@ user_friendship.destroy 
 flash [：success ] =友谊已销毁
 redirect_to user_friendships_path 
 
 end 
 end 
 end 
  

用户友谊新视图

 <％if @friend％> 
 
< h1><％= @ friend.name％>< / h1> 
< p>你真的想要朋友<％= @ friend.name％>？< / p> 
 
<％= form_for @user_friendship，method：：post do | form | ％> 
< div class =form form actions> 
 
<％= form.hidden_​​field：friend_id，value：@ friend.id％> 
<％= submit_tag是，添加好友，class：'btn btn_primary'％> 
<％= link_toCancel，user_path（@friend），class：'btn'％> 
 
< / div> 
 
<％end％> 
 
<％end％> 
  

迁移

  class CreateUserFriendships< ActiveRecord :: Migration 
 def change 
 create_table：user_friendships do | t | 
 t.integer：user_id 
 t.integer：friend_id 
 t.timestamps 
 end 
 add_index：user_friendships，[：user_id，：friend_id] 
 end 
 end 
  

上次迁移

  class AddStateToUserFriendships< ActiveRecord :: Migration 
 def change 
 add_column：user_friendships，：state，：string 
 add_index：user_friendships，：state 
 end 
 end 
  

来自最新schema.rb的UserFriendship表

  create_tableuser_friendships，force：true do | t | 
 t.integeruser_id
 t.integerfriend_id
 t.datetimecreated_at
 t.datetimeupdated_at
 t.stringstate 
 end 
 add_indexuser_friendships，[state]，name：index_user_friendships_on_state
 add_indexuser_friendships，[user_id，friend_id]，name：index_user_friendships_on_user_id_and_friend_id$您应该删除 friend_id    来自中的 attr_accessor 中的和 user_id  >模型，以便将这些值保存在   
 用户友谊& ActiveRecord :: Base 
 belongs_to：user 
 belongs_to：friend，class_name：'User'，foreign_key：'friend_id'
 
 attr_accessor：user，：friend，：state 
 ----- 
 end 
  
 
I am using the 'state_machine' gem.
Once I create a new UserFriendship, the user_id  and friend_id do not get saved. I even tried creating manually the friendship in the console by passing the user_id and friend_id directly but still these two variables do not get saved even though the friendship gets created in the database, the friend and user are not saved . I do not know what 's wrong as it seems to me I am doing everything right.

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

attr_accessor :user, :friend, :user_id, :friend_id, :state

    after_destroy :delete_mutual_friendship!


   state_machine :state, initial: :pending do

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

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


def self.request(user1, user2)
    transaction do
    friendship1 = UserFriendship.create!(user_id: user1.id, friend_id: user2.id, state: 'pending')
    friendship2 = UserFriendship.create!(user_id: user2.id, friend_id: user1.id, 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_mutal_friendship!

    mutual_friendship.update_attribute(:state, 'accepted')
end

def delete_mutual_friendship!
    mutual_friendship.delete
end
User Model
class User < ActiveRecord::Base
 has_many :user_friendships
 has_many :friends, -> { where(user_friendships: { state: "accepted"}) },         through: :user_friendships
 has_many :pending_user_friendships, -> { where  state: "pending" }, class_name: 'UserFriendship', foreign_key: :user_id                                  
 has_many :pending_friends, through: :pending_user_friendships, source: :friend
The UserFrienships Controller
class UserFriendshipsController < ApplicationController
before_filter :authenticate_user!

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

    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_by(id: params[:user_friendship][:friend_id])
        @user_friendship = UserFriendship.request(current_user, @friend)


        if @user_friendship.new_record?
            flash[:error] = "There was a problem creating that friend request."

        else

            flash[:sucess] = "Friend request sent"

        end
        redirect_to current_user
    else
        flash[:error] = "Friend required"
        redirect_to root_path
end 
end

def index
    @user_friendships = current_user.user_friendships.all
end


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

def destroy
    @user_friendship = current_user.user_friendships.find(params[:id])
    if @user_friendship.destroy
        flash[:success] = "Friendship destroyed"
       redirect_to user_friendships_path

end
end
end
The User Friendship new view
<% if @friend %>

<h1><%= @friend.name %></h1>
<p> Do you really want to friend <%= @friend.name %>?</p>

<%= form_for @user_friendship, method: :post do |form| %>
<div class= "form form-actions" >

 <%= form.hidden_field :friend_id, value: @friend.id %>
 <%= submit_tag "Yes, Add Friend", class: 'btn btn_primary' %>
 <%= link_to "Cancel", user_path(@friend), class: 'btn' %>

</div>

<%end%>

<%end%>
The Migrations
class CreateUserFriendships < ActiveRecord::Migration
def change  
create_table :user_friendships do |t|
    t.integer :user_id 
    t.integer :friend_id 
    t.timestamps
 end
    add_index :user_friendships, [:user_id, :friend_id]
end
end
Last Migration
class AddStateToUserFriendships < ActiveRecord::Migration
 def change
  add_column :user_friendships, :state, :string
  add_index :user_friendships, :state
 end
end
UserFriendship table from latest schema.rb
 create_table "user_friendships", force: true do |t|
  t.integer  "user_id"
  t.integer  "friend_id"
  t.datetime "created_at"
  t.datetime "updated_at"
  t.string   "state"
 end
 add_index "user_friendships", ["state"], name: "index_user_friendships_on_state"
 add_index "user_friendships", ["user_id", "friend_id"], name: "index_user_friendships_on_user_id_and_friend_id"

解决方案
You should remove friend_id and user_id from the attr_accessor in user_friendship model in order to save those values in the DB
class UserFriendship < ActiveRecord::Base
belongs_to :user
belongs_to :friend, class_name: 'User', foreign_key: 'friend_id'

attr_accessor :user, :friend, :state
-----
end


                        
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