Question

我老老实实地到处寻找修复这个错误，人们有类似的问题，但我找不到任何帮助我解决我的问题。我正在尝试以其他用户身份登录时查看其他用户个人资料页面。没有设备，为此。我一直在遇到与此完全相同的错误。

这是我的users_controller.rb，

int months = 0;
for (; months< 12; )
{
    td = td.AddMonths(1);
    if (td > next)
    {
        td = td.AddMonths(-1);
        break;
    }
    months++;
}

这是我的用户模型user.rb，

class UsersController < ApplicationController
  before_action :set_user, only: [:show, :edit, :update, :destroy]

  after_action :signed_in_after_register, only: :create 

  def index
    @users = User.all
    @user = User.find(session[:user_id])
  end

  def dashboard 
    @user = User.find(session[:user_id]) unless session[:user_id] == ""
    redirect_to login_path, notice: "You're not logged in" unless @user 
    @posts = @user.posts.order("created_at DESC").limit(3)
    @comment = Comment.new 
    @post = Post.new 
  end 

  def newsfeed
    @user = User.find(session[:user_id]) unless session[:user_id] == nil
    redirect_to login_path, notice: "You're not logged in" unless @user 
    @posts = @user.posts.order("created_at DESC").limit(3)
  end

  def nav
    @user = User.find(session[:user_id])
  end

  def posts
    @user = User.find(session[:user_id])
    @posts = @user.posts
  end

  def destroy
    @user = User.find(session[:user_id]) unless session[:user_id] == ""
    redirect_to login_path, notice: "You're not logged in" unless @user 
  end

  def welcome
    @user = User.find(params[:user_id]) unless session[:user_id] == ""
    redirect_to login_path, notice: "You're not logged in" unless @user 
  end

  def show
    @user = User.find(params[:user_id]) unless session[:user_id] == ""
    redirect_to login_path, notice: "You're not logged in" unless @user 
    @posts = @user.posts.order("created_at DESC").limit(3)
    @comment = Comment.new 
    @post = Post.new 
  end

  def new
    @user = User.new
    @post = Post.new(params[:post_id])
  end

  def edit

  end

  def create
    @user = User.new(user_params)

    respond_to do |format|
      if @user.save
        format.html { redirect_to dashboard_path, notice: 'User was successfully created!' }
        format.json { render :profile, status: :created, location: @user }
      else
        format.html { render :new }
        format.json { render json: @user.errors, status: :unprocessable_entity }
      end
    end
  end

  def update

    respond_to do |format|
      if @user.update(user_params)
        format.html { redirect_to dashboard_path, notice: 'User was successfully updated.' }
        format.json { render :profile, status: :ok, location: @user }
      else
        format.html { render :edit }
        format.json { render json: @user.errors, status: :unprocessable_entity }
      end
    end
  end

  def destroy
    @user.destroy
    respond_to do |format|
      format.html { redirect_to users_url, notice: 'User was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
    def set_user
      @user = User.find(params[:id])
    end
    def signed_in_after_register 
      session[:user_id] = @user.id 
    end

    def user_params
      params.require(:user).permit(:first_name, :last_name, :bio, :password, :password_confirmation, :email, :age, :profile_picture, :post, :body)
    end
   end

这是我的routes.rb，

class User < ActiveRecord::Base
    has_secure_password
    validates :first_name, :last_name, :email, presence: true, uniqueness: true 
    validates_inclusion_of :age, in: 10..100
    validates :password, presence: true, length: { minimum: 4 }, allow_nil: true
    has_many :posts
    has_attached_file :profile_picture, :styles => { :medium => "300x300>", :thumb => "100x100>" }, 
    :default_url => "app/assets/images/missing.png", 
    :path => ":rails_root/public/system/:class/:attachment/:id_partition/:style/:filename" 
    validates_attachment_content_type :profile_picture, :content_type => /\Aimage\/.*\Z/
end

我愿意发布您可能需要查看的任何代码，以进一步帮助解决我的问题。感谢任何帮助，我一直试图解决这个问题3个星期。先谢谢你了！

Answer 1

您的控制器在点击您的操作代码之前正在寻找“id”，通过..

before_action :set_user, only: [:show, :edit, :update, :destroy]

..反过来调用“set_user”方法并尝试...

User.find(params[:id])

但是，您的路由将参数定义为“：user_id”，而不是“：id”...

 get 'profile/:user_id' => 'users#show', as: :profile

由于您在操作中编写了自己的.find查询，请尝试从before_action中删除“：show”。或者你可以干一点，只是在任何地方使用“：id”以避免混淆。：）

Answer 2

正如我在这里看到的那样，你在Params中提供了一个字段user_id而不是id。你应该在url本身发送id。

ex：localhost：3000 / user / 12

同样在你的控制器动作中使用params [：id]而不是params [：user_id]

找不到'id'=的用户

2 个答案: