为nil调用id，错误地为4——如果您真的想要nil的id，请使用object_id.阿米斯塔德的观点

Question

我正在使用amistad作为朋友控制器。现在我想添加朋友，但我得到的错误是：

Called id for nil, which would mistakenly be 4 -- if you really wanted the id of nil, use object_id..

这是我添加好友的链接：

<section>
      <h1>
        <%= @user.username %>
      </h1>
    <% unless current_user == @user  %>
<%= link_to "Arkadaşlarıma Ekle", friends_path(:friend_id => @user), :method => :post,class: "btn btn-large btn-primary" %>
    <%end %>
      </section>

和我的朋友s_controller.rb:

class FriendshipsController < ApplicationController
  before_filter :authenticate_user!
  def index
    @friends = current_user.friends
    @pending_invited_by = current_user.pending_invited_by
    @pending_invited = current_user.pending_invited
  end
  def new
    @users = User.all :conditions => ["id != ?", current_user.id]
  end
  def create
    invitee = User.find_by_id(params[:user_id])
    if current_user.invite invitee
      redirect_to new_friend_path, :notice => "Successfully invited friend!"
    else
      redirect_to new_friend_path, :notice => "Sorry! You can't invite that user!"
    end
  end
  def update
    inviter = User.find_by_id(params[:id])
    if current_user.approve inviter
      redirect_to new_friend_path, :notice => "Successfully confirmed friend!"
    else
      redirect_to new_friend_path, :notice => "Sorry! Could not confirm friend!"
    end
  end
  def requests
    @pending_requests = current_user.pending_invited_by
  end
  def invites
    @pending_invites = current_user.pending_invited
  end
  def destroy
    user = User.find_by_id(params[:id])
    if current_user.remove_friendship user
      redirect_to friends_path, :notice => "Successfully removed friend!"
    else
      redirect_to friends_path, :notice => "Sorry, couldn't remove friend!"
    end
  end 
end 

如何为amistad安排正确的观点？有教程吗？

Answer 1

您的控制器有点乱，但我认为错误在于您发送了一个参数"friend_id"，但在创建操作中，您试图加载一个名为"user_id"的参数的用户。可能的方法：

current_user.invite invitee

正在被调用，而受邀者为零，所以您收到了此错误。

希望它能有所帮助！：）