我昨天提交了这个问题,并且基本上能够从我得到的答案中解决问题,但是我现在遇到了一个不同但相关的问题。
我在对象 Car 的显示视图中有以下代码:
<%= link_to @user do %>
<%= image_tag @user.profile.avatar.url, class: 'user-index-avatar' %>
<h3><%= @user.profile.company %></h3>
<% end %>
<h4><%= @user.profile.location %></h4>
<h4><%= @user.profile.phone_number %></h4>
<h4><%= @user.profile.email %></h4>
<% if user_signed_in? && @user.id == current_user.id %>
<%= link_to "Edit Listing", edit_car_path(id: @car.id ), class: 'btn btn-lg btn-warning btn-block' %>
<% end %>
当我转到此页面时,我收到错误消息"ActiveRecord::RecordNotFound in CarsController#show"和"找不到带有'id'=的用户">
耙子路线:
cars GET /cars(.:format) cars#index
GET /cars(.:format) cars#index
POST /cars(.:format) cars#create
new_car GET /cars/new(.:format) cars#new
edit_car GET /cars/:id/edit(.:format) cars#edit
car GET /cars/:id(.:format) cars#show
PATCH /cars/:id(.:format) cars#update
PUT /cars/:id(.:format) cars#update
DELETE /cars/:id(.:format) cars#destroy
new_user_profile GET /users/:user_id/profile/new(.:format) profiles#new
edit_user_profile GET /users/:user_id/profile/edit(.:format) profiles#edit
user_profile GET /users/:user_id/profile(.:format) profiles#show
PATCH /users/:user_id/profile(.:format) profiles#update
PUT /users/:user_id/profile(.:format) profiles#update
DELETE /users/:user_id/profile(.:format) profiles#destroy
POST /users/:user_id/profile(.:format) profiles#create
user_cars GET /users/:user_id/cars(.:format) cars#index
POST /users/:user_id/cars(.:format) cars#create
new_user_car GET /users/:user_id/cars/new(.:format) cars#new
GET /cars/:id/edit(.:format) cars#edit
GET /cars/:id(.:format) cars#show
PATCH /cars/:id(.:format) cars#update
PUT /cars/:id(.:format) cars#update
DELETE /cars/:id(.:format) cars#destroy
模型:
class Car < ActiveRecord::Base
belongs_to :user
end
class User < ApplicationRecord
belongs_to :plan
has_one :profile
has_many :cars
路线.rb
get 'cars' => 'cars#index', as: :cars
resources :cars
resources :users do
resource :profile
resources :cars, shallow: true
end
汽车控制器:
def show
@car = Car.find( params[:id] )
@user = User.find( params[:user_id] )
@profile = @user.profile
end
该错误指定问题出在"@user = User.find( params[:user_id] ("上,但我不确定如何定义@user。如上面链接的问题所述,我是一个完全的新手,所以如果这是一个明显的修复,请原谅我。
Rails find 方法在无法通过指定 id 查找记录时引发此异常。您可以在参数中仔细检查您的user_id,并查看该 id 的记录是否确实存在于数据库中。
根据您粘贴的错误,您的参数中似乎user_id为空。你总是可以做一些事情,比如
puts "Look for me in consolen"*10
puts params.inspect
而不是在日志窗口中查看您实际接收的参数。
我看到您的问题通过访问汽车模型中的用户关联在评论中得到解决,但此答案旨在指出问题的根源并减少 SO 中未回答的问题数量:)