Question

我收到此错误：未定义的局部变量或方法`user'代表＃配置文件控制器第9行，“def更新方法后的第一行”BTW我正在为我的用户使用Devise。

class ProfileController < ApplicationController
before_action :authenticate_user!

def index
  @user = current_user
end

def update
  current_user.update(user.params) 
  redirect_to root_path
end


private
  def user_params
  params.require(user).permit(:first_name, :last_name)
  end
end

这是我的application.html.erb，我的编辑器“Rubymine”告诉我，user_signed_in？，current_user，destroy_user_session_path，new_user_session_path和new_user_registration_path无法找到

<!DOCTYPE html>
<html>
<head>
<title>TwitterClone</title>
<%= stylesheet_link_tag    'application', media: 'all' %>
<%= javascript_include_tag 'application' %>
<!-- Compiled and minified CSS -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.97.6/css/materialize.min.css">
<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
<!-- Compiled and minified JavaScript -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.97.6/js/materialize.min.js"></script>
<%= csrf_meta_tags %>
</head>
<body>

<div class="right">
<% if user_signed_in? %>
  Welcome <%= current_user.display_name %>,
    <%= link_to "Logout", destroy_user_session_path, method: "DELETE" %>
<% else %>
  Please
    <%= link_to "Login", new_user_session_path %>
    or
    <%= link_to "Signup", new_user_registration_path %>
<% end %>
</div>
<p class="notice"><%= notice %></p>
<p class="alert"><%= alert %></p>
<%= yield %>
</body>
</html>

我的路由是Devise为User生成的路由以及我对Profile所具有的路径：

profile GET    /profile(.:format)             profile#index
        PATCH  /profile(.:format)             profile#update

这是生成的架构Devise：

ActiveRecord::Schema.define(version: 20160406005549) do

# These are extensions that must be enabled in order to support this database
enable_extension "plpgsql"

create_table "users", force: :cascade do |t|
 t.string   "email",                  default: "", null: false
 t.string   "encrypted_password",     default: "", null: false
 t.string   "reset_password_token"
 t.datetime "reset_password_sent_at"
 t.datetime "remember_created_at"
 t.integer  "sign_in_count",          default: 0,  null: false
 t.datetime "current_sign_in_at"
 t.datetime "last_sign_in_at"
 t.inet     "current_sign_in_ip"
 t.inet     "last_sign_in_ip"
 t.datetime "created_at",                          null: false
 t.datetime "updated_at",                          null: false
 t.string   "first_name"
 t.string   "last_name"
end

add_index "users", ["email"], name: "index_users_on_email", unique: true, using: :btree
add_index "users", ["reset_password_token"], name:    "index_users_on_reset_password_token", unique: true, using: :btree

end

Answer 1

您的代码存在一些问题。对于初学者，你在控制器中调用一个未定义的变量。 user应为符号，user.params应为user_params

class ProfileController < ApplicationController
before_action :authenticate_user!

def index
  @user = current_user
end

def update
  current_user.update(user_params) 
  redirect_to root_path
end


private
  def user_params
  params.require(:user).permit(:first_name, :last_name)
  end
end

您还需要更新路线以支持您描述的用户操作：

在routes.rb中：

resources :users

最后，要使用Devise帮助器方法，请确保在routes.rb的顶部也有Devise路由：

devise_for :users

未定义的局部变量或方法`user'

1 个答案: