我想用 Ruby on Rails 进行身份验证，每个用户都有自己的帐户。但是现在我得到了这个错误:
undefined method user_signed_in? for #<ProjectsController:0x007faead1853e0>
有人能帮帮我吗？
代码如下:
完整跟踪:
app/controllers/projects_controller.rb:69:in `require_login'
activesupport (3.2.3) lib/active_support/callbacks.rb:418:in `_run__2505248868868045404__process_action__114470166732456289__callbacks'
activesupport (3.2.3) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.3) lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks'
activesupport (3.2.3) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.3) lib/abstract_controller/callbacks.rb:17:in `process_action'
actionpack (3.2.3) lib/action_controller/metal/rescue.rb:29:in `process_action'
actionpack (3.2.3) lib/action_controller/metal/instrumentation.rb:30:in `block in process_action'
activesupport (3.2.3) lib/active_support/notifications.rb:123:in `block in instrument'
activesupport (3.2.3) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (3.2.3) lib/active_support/notifications.rb:123:in `instrument'
actionpack (3.2.3) lib/action_controller/metal/instrumentation.rb:29:in `process_action'
actionpack (3.2.3) lib/action_controller/metal/params_wrapper.rb:205:in `process_action'
activerecord (3.2.3) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (3.2.3) lib/abstract_controller/base.rb:121:in `process'
actionpack (3.2.3) lib/abstract_controller/rendering.rb:45:in `process'
actionpack (3.2.3) lib/action_controller/metal.rb:203:in `dispatch'
actionpack (3.2.3) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch'
actionpack (3.2.3) lib/action_controller/metal.rb:246:in `block in action'
actionpack (3.2.3) lib/action_dispatch/routing/route_set.rb:73:in `call'
actionpack (3.2.3) lib/action_dispatch/routing/route_set.rb:73:in `dispatch'
actionpack (3.2.3) lib/action_dispatch/routing/route_set.rb:36:in `call'
journey (1.0.3) lib/journey/router.rb:68:in `block in call'
journey (1.0.3) lib/journey/router.rb:56:in `each'
journey (1.0.3) lib/journey/router.rb:56:in `call'
actionpack (3.2.3) lib/action_dispatch/routing/route_set.rb:600:in `call'
actionpack (3.2.3) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
rack (1.4.1) lib/rack/etag.rb:23:in `call'
rack (1.4.1) lib/rack/conditionalget.rb:25:in `call'
actionpack (3.2.3) lib/action_dispatch/middleware/head.rb:14:in `call'
actionpack (3.2.3) lib/action_dispatch/middleware/params_parser.rb:21:in `call'
actionpack (3.2.3) lib/action_dispatch/middleware/flash.rb:242:in `call'
rack (1.4.1) lib/rack/session/abstract/id.rb:205:in `context'
rack (1.4.1) lib/rack/session/abstract/id.rb:200:in `call'
actionpack (3.2.3) lib/action_dispatch/middleware/cookies.rb:338:in `call'
activerecord (3.2.3) lib/active_record/query_cache.rb:64:in `call'
activerecord (3.2.3) lib/active_record/connection_adapters/abstract/connection_pool.rb:467:in `call'
actionpack (3.2.3) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
activesupport (3.2.3) lib/active_support/callbacks.rb:405:in `_run__4031929640367205598__call__2058268190974805736__callbacks'
activesupport (3.2.3) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.3) lib/active_support/callbacks.rb:385:in `_run_call_callbacks'
activesupport (3.2.3) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.3) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
actionpack (3.2.3) lib/action_dispatch/middleware/reloader.rb:65:in `call'
actionpack (3.2.3) lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
actionpack (3.2.3) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
actionpack (3.2.3) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
railties (3.2.3) lib/rails/rack/logger.rb:26:in `call_app'
railties (3.2.3) lib/rails/rack/logger.rb:16:in `call'
actionpack (3.2.3) lib/action_dispatch/middleware/request_id.rb:22:in `call'
rack (1.4.1) lib/rack/methodoverride.rb:21:in `call'
rack (1.4.1) lib/rack/runtime.rb:17:in `call'
activesupport (3.2.3) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
rack (1.4.1) lib/rack/lock.rb:15:in `call'
actionpack (3.2.3) lib/action_dispatch/middleware/static.rb:62:in `call'
railties (3.2.3) lib/rails/engine.rb:479:in `call'
railties (3.2.3) lib/rails/application.rb:220:in `call'
rack (1.4.1) lib/rack/content_length.rb:14:in `call'
railties (3.2.3) lib/rails/rack/log_tailer.rb:14:in `call'
rack (1.4.1) lib/rack/handler/webrick.rb:59:in `service'
/Users/sinaoberle/.rbenv/versions/1.9.3-p0/lib/ruby/1.9.1/webrick/httpserver.rb:138:in `service'
/Users/sinaoberle/.rbenv/versions/1.9.3-p0/lib/ruby/1.9.1/webrick/httpserver.rb:94:in `run'
/Users/sinaoberle/.rbenv/versions/1.9.3-p0/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread'
projects_controller.rb
class ProjectsController < ApplicationController
before_filter :require_login
# GET /projects
# GET /projects.json
def index
@projects = current_user.projects
end
# GET /projects/1
# GET /projects/1.json
def show
@projects = current_user.projects.find(params[:id])
end
# GET /projects/new
# GET /projects/new.json
def new
@projects = current_user.projects.build
end
# GET /projects/1/edit
def show
@projects = current_user.projects.find(params[:id])
end
# POST /projects
# POST /projects.json
def create
@projects = current_user.projects.build(params[:mytime])
if @projects.save
redirect_to projects_path,
notice: 'Created successfully!'
else
render 'new'
end
end
# PUT /projects/1
# PUT /projects/1.json
def update
@projects = current_user.projects.find(params[:id])
if @projects.update_attributes(params[:mytime])
redirect_to projects_path,
notice: 'Changed successfully!'
else
render 'edit'
end
end
# DELETE /projects/1
# DELETE /projects/1.json
def destroy
@projects = current_user.projects.find(params[:id])
@projects.destroy
redirect_to projects_url,
notice: 'Deleted successfully!'
end
end
private
def require_login
unless user_signed_in?
redirect_to login_path,
alert: "Please, Sign In first!"
end
end
application.html.erb
<!DOCTYPE html>
<html>
<head>
<title>Test</title>
<%= stylesheet_link_tag "application", :media => "all" %>
<%= javascript_include_tag "application" %>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<%= csrf_meta_tags %>
</head>
<body>
<div id="container">
<div id="content">
<% if flash[:notice] %>
<p id="notice">
<%= flash[:notice] %>
</p>
<% end %>
<% if flash[:alert] %>
<p id= "alert">
<%= flash[:alert] %>
</p>
<% end %>
</div>
<div id="footer">
<%= link_to "Sign In", new_user_path %> |
<% if user_signed_in? %>
<%= link_to "Logout", logout_path, method: :delete %> |
<%= link_to "Test", projects_path %>
<% else %>
<%= link_to "Login", login_path %>
<% end %>
<%= yield %>
</div>
</div>
</body>
</html>
routes.rb
项目::Application.routes.draw 做
get "pages/home"
resources :projects
resources :users, :only => [:new, :create]
resources :sessions, :only => [:create]
get "login" => "sessions#new", as: "login"
post "sessions" => "sessions#create", as: "sessions"
delete "logout" => "sessions#destroy", as: "logout"
root to: 'pages#home'
最佳答案
您是否正在使用设备进行身份验证？我自己没有使用过它，但通过查看 devise code和 documentation看起来你应该在 Controller (或某些父 Controller 类)中执行 before_filter :authenticate_user!，你想在其中使用像 user_signed_in? 这样的助手。
请注意，从 Rails 5.1 开始，您必须改用 before_action。
关于ruby-on-rails - #<ProjectsController :0x007faead1853e0> 的未定义方法 `user_signed_in?'，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/10717038/
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