Question

我正在将我的应用从rails3升级到rails4。在friendship.controller.rb我有这条线 @friend = User.find（params [：friend_id]）当然，这应该识别具有对应于值的id的朋友友情表中的friend_id。它返回一个空白。 User.find（params [：id]）返回340，这是友谊的id

有什么想法吗？

class FriendshipController < ApplicationController
  include ProfileHelper
  before_filter :setup_friends

  def create
    Friendship.request(@user, @friend)
    user = @user
    friend = @friend

    #MakeMailer.friend_request(user,friend).deliver

    flash[:notice] = "Friend request sent."
    redirect_to user_path(@user.id)
  end

  def accept
    if @user.requested_friends.include?(@friend)
      Friendship.accept(@friend, @user)
      flash[:notice] = "Friendship with #{@friend.login} accepted!"
    else
      flash[:notice] = "No friendship request from #{@friend.login}."
    end
    redirect_to user_path(@user.id)
  end

  def decline
    if @user.requested_friends.include?(@friend)
      Friendship.breakup(@user, @friend)
      flash[:notice] = "Friendship with #{@friend.login} declined"
    else
      flash[:notice] = "No friendship request from #{@friend.login}."
    end
    redirect_to user_path(@user.id)
  end

  def cancel
    if @user.pending_friends.include?(@friend)
      Friendship.breakup(@user, @friend)
      flash[:notice] = "Friendship request canceled."
    else
      flash[:notice] = "No request for friendship with #{@friend.login}"
    end
    redirect_to user_path(@user.id)
  end

  def delete
    if @user.friends.include?(@friend)
      Friendship.breakup(@user, @friend)
      flash[:notice] = "Friendship with #{@friend.login} deleted!"
    else
      flash[:notice] = "You aren't friends with #{@friend.login}"
    end
    redirect_to user_path(@user.id)
  end

  private

  def setup_friends
    @user = @current_user
    @friend = User.where(:id => params[:friend_id])
  end
end

Answer 1

User.find(id_of_user)方法默认使用用户ID，而不是任何其他属性，如果您想使用其他参数进行搜索，可以使用where或find_by_attribute。

User.where(:friend_id => params[:friend_id])或

User.find_by_friend_id(params[:friend_id)

在Rails4中找不到预期的行为

1 个答案: