的Ruby / Rails：friend_id没有添加到友谊表 [英] Ruby/Rails: friend_id is not added to friendships table

问题描述

使用Rails 4.1.4框架。其加入了friend_id到user_friendships见下表一个问题...当程序在运行轨道，我重定向到根目录（如预期），并给出了友谊的创建成功消息。然而，当我破解打开数据库GUI，我看到只有一个user_id是保存在user_id列，而friend_id列总是留给'零'，不管是谁的朋友是谁。我已经搜查高和低 - 我知道它必须是简单的东西，它的驾驶我疯狂。任何帮助深表AP preciated！

任何人都可以看到我可能会在code，将prevent这个被保存所做的错误呢？难道是一个缺少强有力的参数问题的friend_id，如果是这样，我怎么去纠正呢？

模型：

 类用户＆LT; ActiveRecord的::基地
  的has_many：user_friendships
  的has_many：朋友们，通过：user_friendships
类UserFriendship＆LT; ActiveRecord的::基地
    belongs_to的：用户
    belongs_to的：朋友，CLASS_NAME：用户，foreign_key：friend_id
 

控制器：

 类UserFriendshipsController＆LT; ApplicationController中
    的before_filter：的authenticate_user！只有：[新]    高清新
        如果PARAMS [：friend_id]
            @friend = User.where（PROFILE_NAME：PARAMS [：friend_id]）。第一
            募集的ActiveRecord :: RecordNotFound如果@ friend.nil？
            @user_friendship = current_user.user_friendships.new（朋友：@friend）
        其他
            闪光[：错误] ='朋友必需的。
        结束        抢救的ActiveRecord :: RecordNotFound
            渲染文件：公共/ 404'，状态：NOT_FOUND
    结束    打造高清
        如果PARAMS [：user_friendship＆放大器;＆安培; PARAMS [：user_friendship] .has_key？（：friend_id）
            @friend = User.where（PROFILE_NAME：PARAMS [：user_friendship] [：friend_id]）。第一
            @user_friendship = current_user.user_friendships.new（朋友：@friend）
            @ user_friendship.save
            redirect_to的root_path
            闪光[：成功] =您现在是朋友。 #{@friend.full_name}
        其他
            闪光[：错误] ='朋友必需的。
            redirect_to的root_path
        结束
    结束
 

user_friendships查看文件--new.html.erb

 ＆LT;％如果@friend％GT;    ＆LT; H1＆GT; ＆所述;％= @ friend.full_name％GT; ＆LT; / H1＆GT;    ＆所述p为H.;你真的想成为朋友以＆lt;％= @ friend.full_name％GT;＆LT; / P＆GT;    ＆LT;％=的form_for @user_friendship，方法：做后期| F | ％GT;
        ＆LT; D​​IV CLASS =表格表单行动＆GT;
            ＆LT;％= f.hidden_​​field：friend_id，值：@ friend.profile_name％GT;
            ＆LT;％= submit_tag是的，添加好友，等级：BTN BTN-主'％GT;
            ＆LT;％=的link_to取消，profile_path（@friend）类：BTN'％GT;
        ＆LT; / DIV＆GT;    ＆LT;％结束％GT;＆LT;％结束％GT;
 

- 表单提交按钮上方的个人资料页上

 ＆LT; D​​IV CLASS =页面页眉＆GT;
    ＆LT; H1＆GT; ＆所述;％= @ user.full_name％GT; ＆LT; / H1＆GT;
    ＆LT;％=的link_to添加好友，new_user_friendship_path（friend_id：@user）类：BTN'％GT;
＆LT; / DIV＆GT;
 

解决方案

您有 PROFILE_NAME 的一个问题。我不知道它是什么，但它应该是一个 ID 。因此，在控制器变化模型搜索：

  @friend = User.find_by_id（PARAMS [：user_friendship] [：USER_ID]）
 

和模板＆LT;％= f.hidden_​​field：friend_id，值：@ friend.id％GT;

这对我的作品

不过，如果您使用的是friendly_id宝石，或强迫你使用另一件事 PROFILE_NAME 而不是 ID ，你也应该用在其他地方，比如链接：

  new_user_friendship_path（friend_id：@ user.profile_name）
 

也许这将有所帮助。

Using the Rails 4.1.4 framework. Having a problem adding a 'friend_id' to the user_friendships table below... when the program runs in rails, I am redirected to the root (as expected) and given the success message that the friendship was created. However, when I crack open the database GUI, I see that only a user_id is saved into the user_id column, and the friend_id column is always left 'nil', no matter who friends who. I've searched high and low - I know it must be something simple and it's driving me crazy. Any help is much appreciated!

Can anyone see the mistake I may have made in the code that would prevent this from being saved? Could it be a missing strong parameters issue for friend_id, and if so, how do I go about correcting it?

The Models:

class User < ActiveRecord::Base
  has_many :user_friendships
  has_many :friends, through: :user_friendships


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

The Controller:

class UserFriendshipsController < ApplicationController
    before_filter :authenticate_user!, only: [:new]

    def new
        if params[:friend_id]
            @friend = User.where(profile_name: params[:friend_id]).first
            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.where(profile_name: params[:user_friendship][:friend_id]).first
            @user_friendship = current_user.user_friendships.new(friend: @friend)
            @user_friendship.save
            redirect_to root_path
            flash[:success] = "You are now friends." #{@friend.full_name}
        else
            flash[:error] = 'Friend required.'
            redirect_to root_path
        end
    end

user_friendships view files --new.html.erb

<% if @friend %>

    <h1> <%= @friend.full_name %> </h1>

    <p> Do you really want to become friends with <%= @friend.full_name %>?</p>

    <%= form_for @user_friendship, method: :post do |f| %>
        <div class="form form-actions">
            <%= f.hidden_field :friend_id, value: @friend.profile_name %>
            <%= submit_tag "Yes, Add Friend", class: 'btn btn-primary' %>
            <%= link_to "Cancel", profile_path(@friend), class: 'btn' %>
        </div>

    <% end %>

<% end %>

-- submission button for form above on profile page

<div class="page-header">
    <h1> <%= @user.full_name%> </h1>
    <%= link_to "Add Friend", new_user_friendship_path(friend_id: @user), class:'btn'%>
</div>

解决方案

You have a problem with profile_name. I don't know what is it, but it should be an id. So, in controller change model search to:

@friend = User.find_by_id(params[:user_friendship][:user_id])

And in template <%= f.hidden_field :friend_id, value: @friend.id %>

This works for me

However, if you are using friendly_id gem, or another thing that force you to use profile_name instead of id, you should also use it in other places, like links:

new_user_friendship_path(friend_id: @user.profile_name)

Maybe this will help.

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