Ruby on rails Rails 4-专家-如何编写范围

我正在尝试学习如何将Pundit与Rails 4结合使用。在过去的两年里，我一直在努力学习这一点，并且正在慢慢取得一些进展

我还试图学习如何编写作用域。我还在想办法把建议翻译成通俗易懂的英语，这样我就可以开始理解了

我陷入了权威政策使用的范围和我可以在模型中编写的通用范围类的交叉点

我有Uer、个人资料和项目的模型

这些协会是：

使用者

侧面图

belongs_to :user
has_many :projects

计划

belongs_to :profile

我试图写一个权威政策，允许不同的用户看到不同的项目。我正在写一个有范围的政策，用权威的语言来管理它

在我的项目模型中，我试图编写查找用户所有项目的范围。用简单的英语，我想搜索所有项目，查找那些具有属于与当前用户相同的用户id的配置文件id的项目

在我的权威政策中，我尝试编写以下解析方法：

class Scope
    attr_reader :user, :scope

    def initialize(user, scope)
      @user  = user
      @scope = scope
    end

    def resolve
      if user.has_role?(:admin)
        scope.all
      elsif user.id == @project.profile.user_id
        scope.projects_for_user 
      elsif user.present?
        scope.in_state(:publish)
      else 
        Project.none  
      end
    end
  end

我尝试了大约100种不同的方法，试图在我的项目模型上编写一个范围，以查找属于当前用户的项目。我知道我不能在模型中使用Deviate的当前用户，所以我不能在范围内使用它。这两次都是我最好的尝试——都是错误的

scope :projects_for_user, -> { joins(:user_id).where('project.profile.user_id = ?', user.id) }

scope :projects_for_user, -> { where(project.profile.user_id: User.id) }

我学习这一点的主要问题是，我看不出如何将这一行分解成不同的部分

据我所知，在“：”之前的一点是你正在寻找的东西。“：”后面的位是运行作用域时使用的实例。如果这是对的，那么我很困惑为什么我的第二次尝试没有成功（也很困惑第一次尝试中的JOIN语句）

如果有人能用简单的英语解释如何编写作用域，我相信我知道我想要查找什么，只是在如何编写查询以找到它上迷失了方向

目前，当我尝试使用我的项目策略时（我已经尝试将Taryn的建议合并到下面——尽管我不了解范围的每个组成部分，所以我不确定它是怎么回事）

在我的项目控制器中，我有：

class ProjectsController < ApplicationController

  before_action :set_project, only: [:show, :edit, :update, :destroy ]
  before_action :authenticate_user!

  def index
    @projects = Project.all
    authorize @projects
  end

  def show
    @project = Project.find(params[:id])
    # authorize @project

  end

private
    def set_project
      @project = Project.find(params[:id])
      authorize @project
    end

当我试图查看项目索引或特定项目时，会返回此错误（因此我认为这与范围无关）。我不明白有哪两个论点是为了知道如何着手解决这个问题

添加堆栈跟踪

ArgumentError - wrong number of arguments (given 2, expected 0):
  pundit (1.1.0) lib/pundit.rb:112:in `policy!'
  pundit (1.1.0) lib/pundit.rb:235:in `policy'
  pundit (1.1.0) lib/pundit.rb:194:in `authorize'
  app/controllers/eois_controller.rb:20:in `show'
  actionpack (4.2.4) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
  actionpack (4.2.4) lib/abstract_controller/base.rb:198:in `process_action'
  actionpack (4.2.4) lib/action_controller/metal/rendering.rb:10:in `process_action'
  actionpack (4.2.4) lib/abstract_controller/callbacks.rb:20:in `block in process_action'
  activesupport (4.2.4) lib/active_support/callbacks.rb:117:in `call'
  activesupport (4.2.4) lib/active_support/callbacks.rb:555:in `block (2 levels) in compile'
  activesupport (4.2.4) lib/active_support/callbacks.rb:505:in `call'
  activesupport (4.2.4) lib/active_support/callbacks.rb:92:in `__run_callbacks__'
  activesupport (4.2.4) lib/active_support/callbacks.rb:778:in `_run_process_action_callbacks'
  activesupport (4.2.4) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (4.2.4) lib/abstract_controller/callbacks.rb:19:in `process_action'
  actionpack (4.2.4) lib/action_controller/metal/rescue.rb:29:in `process_action'
  actionpack (4.2.4) lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
  activesupport (4.2.4) lib/active_support/notifications.rb:164:in `block in instrument'
  activesupport (4.2.4) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
  activesupport (4.2.4) lib/active_support/notifications.rb:164:in `instrument'
  actionpack (4.2.4) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
  actionpack (4.2.4) lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
  searchkick (1.3.0) lib/searchkick/logging.rb:153:in `process_action'
  activerecord (4.2.4) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
  actionpack (4.2.4) lib/abstract_controller/base.rb:137:in `process'
  actionview (4.2.4) lib/action_view/rendering.rb:30:in `process'
  actionpack (4.2.4) lib/action_controller/metal.rb:196:in `dispatch'
  actionpack (4.2.4) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
  actionpack (4.2.4) lib/action_controller/metal.rb:237:in `block in action'
  actionpack (4.2.4) lib/action_dispatch/routing/route_set.rb:76:in `dispatch'
  actionpack (4.2.4) lib/action_dispatch/routing/route_set.rb:45:in `serve'
  actionpack (4.2.4) lib/action_dispatch/journey/router.rb:43:in `block in serve'
  actionpack (4.2.4) lib/action_dispatch/journey/router.rb:30:in `serve'
  actionpack (4.2.4) lib/action_dispatch/routing/route_set.rb:821:in `call'
  omniauth (1.3.1) lib/omniauth/strategy.rb:186:in `call!'
  omniauth (1.3.1) lib/omniauth/strategy.rb:164:in `call'
  omniauth (1.3.1) lib/omniauth/strategy.rb:186:in `call!'
  omniauth (1.3.1) lib/omniauth/strategy.rb:164:in `call'
  omniauth (1.3.1) lib/omniauth/strategy.rb:186:in `call!'
  omniauth (1.3.1) lib/omniauth/strategy.rb:164:in `call'
  omniauth (1.3.1) lib/omniauth/strategy.rb:186:in `call!'
  omniauth (1.3.1) lib/omniauth/strategy.rb:164:in `call'
  meta_request (0.4.0) lib/meta_request/middlewares/app_request_handler.rb:13:in `call'
  meta_request (0.4.0) lib/meta_request/middlewares/meta_request_handler.rb:13:in `call'
  warden (1.2.6) lib/warden/manager.rb:35:in `block in call'
  warden (1.2.6) lib/warden/manager.rb:34:in `call'
  rack (1.6.4) lib/rack/etag.rb:24:in `call'
  rack (1.6.4) lib/rack/conditionalget.rb:25:in `call'
  rack (1.6.4) lib/rack/head.rb:13:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/flash.rb:260:in `call'
  rack (1.6.4) lib/rack/session/abstract/id.rb:225:in `context'
  rack (1.6.4) lib/rack/session/abstract/id.rb:220:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/cookies.rb:560:in `call'
  activerecord (4.2.4) lib/active_record/query_cache.rb:36:in `call'
  activerecord (4.2.4) lib/active_record/connection_adapters/abstract/connection_pool.rb:653:in `call'
  activerecord (4.2.4) lib/active_record/migration.rb:377:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
  activesupport (4.2.4) lib/active_support/callbacks.rb:88:in `__run_callbacks__'
  activesupport (4.2.4) lib/active_support/callbacks.rb:778:in `_run_call_callbacks'
  activesupport (4.2.4) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (4.2.4) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/reloader.rb:73:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
  better_errors (2.1.1) lib/better_errors/middleware.rb:84:in `protected_app_call'
  better_errors (2.1.1) lib/better_errors/middleware.rb:79:in `better_errors_call'
  better_errors (2.1.1) lib/better_errors/middleware.rb:57:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
  rack-contrib (1.4.0) lib/rack/contrib/response_headers.rb:17:in `call'
  meta_request (0.4.0) lib/meta_request/middlewares/headers.rb:16:in `call'
  web-console (2.3.0) lib/web_console/middleware.rb:28:in `block in call'
  web-console (2.3.0) lib/web_console/middleware.rb:18:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
  railties (4.2.4) lib/rails/rack/logger.rb:38:in `call_app'
  railties (4.2.4) lib/rails/rack/logger.rb:20:in `block in call'
  activesupport (4.2.4) lib/active_support/tagged_logging.rb:68:in `block in tagged'
  activesupport (4.2.4) lib/active_support/tagged_logging.rb:26:in `tagged'
  activesupport (4.2.4) lib/active_support/tagged_logging.rb:68:in `tagged'
  railties (4.2.4) lib/rails/rack/logger.rb:20:in `call'
  request_store (1.3.1) lib/request_store/middleware.rb:9:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/request_id.rb:21:in `call'
  rack (1.6.4) lib/rack/methodoverride.rb:22:in `call'
  rack (1.6.4) lib/rack/runtime.rb:18:in `call'
  activesupport (4.2.4) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
  rack (1.6.4) lib/rack/lock.rb:17:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/static.rb:116:in `call'
  rack (1.6.4) lib/rack/sendfile.rb:113:in `call'
  skylight (0.10.6) lib/skylight/middleware.rb:61:in `call'
  railties (4.2.4) lib/rails/engine.rb:518:in `call'
  railties (4.2.4) lib/rails/application.rb:165:in `call'
  rack (1.6.4) lib/rack/content_length.rb:15:in `call'
  puma (3.4.0) lib/puma/configuration.rb:224:in `call'
  puma (3.4.0) lib/puma/server.rb:569:in `handle_request'
  puma (3.4.0) lib/puma/server.rb:406:in `process_client'
  puma (3.4.0) lib/puma/server.rb:271:in `block in run'
  puma (3.4.0) lib/puma/thread_pool.rb:114:in `block in spawn_thread'

于2016-09-08 13:23:01+1000开始发布针对：：1的“/\uuuuuuuuuu更好的uu错误/123578515c1e4e10/变量”

堆栈跟踪分析

ArgumentError - wrong number of arguments (given 2, expected 0):
  pundit (1.1.0) lib/pundit.rb:112:in `policy!'
  pundit (1.1.0) lib/pundit.rb:235:in `policy'
  pundit (1.1.0) lib/pundit.rb:194:in `authorize'
  app/controllers/eois_controller.rb:20:in `show'
  actionpack (4.2.4) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
  actionpack (4.2.4) lib/abstract_controller/base.rb:198:in `process_action'
  actionpack (4.2.4) lib/action_controller/metal/rendering.rb:10:in `process_action'
  actionpack (4.2.4) lib/abstract_controller/callbacks.rb:20:in `block in process_action'
  activesupport (4.2.4) lib/active_support/callbacks.rb:117:in `call'
  activesupport (4.2.4) lib/active_support/callbacks.rb:555:in `block (2 levels) in compile'
  activesupport (4.2.4) lib/active_support/callbacks.rb:505:in `call'
  activesupport (4.2.4) lib/active_support/callbacks.rb:92:in `__run_callbacks__'
  activesupport (4.2.4) lib/active_support/callbacks.rb:778:in `_run_process_action_callbacks'
  activesupport (4.2.4) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (4.2.4) lib/abstract_controller/callbacks.rb:19:in `process_action'
  actionpack (4.2.4) lib/action_controller/metal/rescue.rb:29:in `process_action'
  actionpack (4.2.4) lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
  activesupport (4.2.4) lib/active_support/notifications.rb:164:in `block in instrument'
  activesupport (4.2.4) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
  activesupport (4.2.4) lib/active_support/notifications.rb:164:in `instrument'
  actionpack (4.2.4) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
  actionpack (4.2.4) lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
  searchkick (1.3.0) lib/searchkick/logging.rb:153:in `process_action'
  activerecord (4.2.4) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
  actionpack (4.2.4) lib/abstract_controller/base.rb:137:in `process'
  actionview (4.2.4) lib/action_view/rendering.rb:30:in `process'
  actionpack (4.2.4) lib/action_controller/metal.rb:196:in `dispatch'
  actionpack (4.2.4) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
  actionpack (4.2.4) lib/action_controller/metal.rb:237:in `block in action'
  actionpack (4.2.4) lib/action_dispatch/routing/route_set.rb:76:in `dispatch'
  actionpack (4.2.4) lib/action_dispatch/routing/route_set.rb:45:in `serve'
  actionpack (4.2.4) lib/action_dispatch/journey/router.rb:43:in `block in serve'
  actionpack (4.2.4) lib/action_dispatch/journey/router.rb:30:in `serve'
  actionpack (4.2.4) lib/action_dispatch/routing/route_set.rb:821:in `call'
  omniauth (1.3.1) lib/omniauth/strategy.rb:186:in `call!'
  omniauth (1.3.1) lib/omniauth/strategy.rb:164:in `call'
  omniauth (1.3.1) lib/omniauth/strategy.rb:186:in `call!'
  omniauth (1.3.1) lib/omniauth/strategy.rb:164:in `call'
  omniauth (1.3.1) lib/omniauth/strategy.rb:186:in `call!'
  omniauth (1.3.1) lib/omniauth/strategy.rb:164:in `call'
  omniauth (1.3.1) lib/omniauth/strategy.rb:186:in `call!'
  omniauth (1.3.1) lib/omniauth/strategy.rb:164:in `call'
  meta_request (0.4.0) lib/meta_request/middlewares/app_request_handler.rb:13:in `call'
  meta_request (0.4.0) lib/meta_request/middlewares/meta_request_handler.rb:13:in `call'
  warden (1.2.6) lib/warden/manager.rb:35:in `block in call'
  warden (1.2.6) lib/warden/manager.rb:34:in `call'
  rack (1.6.4) lib/rack/etag.rb:24:in `call'
  rack (1.6.4) lib/rack/conditionalget.rb:25:in `call'
  rack (1.6.4) lib/rack/head.rb:13:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/flash.rb:260:in `call'
  rack (1.6.4) lib/rack/session/abstract/id.rb:225:in `context'
  rack (1.6.4) lib/rack/session/abstract/id.rb:220:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/cookies.rb:560:in `call'
  activerecord (4.2.4) lib/active_record/query_cache.rb:36:in `call'
  activerecord (4.2.4) lib/active_record/connection_adapters/abstract/connection_pool.rb:653:in `call'
  activerecord (4.2.4) lib/active_record/migration.rb:377:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
  activesupport (4.2.4) lib/active_support/callbacks.rb:88:in `__run_callbacks__'
  activesupport (4.2.4) lib/active_support/callbacks.rb:778:in `_run_call_callbacks'
  activesupport (4.2.4) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (4.2.4) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/reloader.rb:73:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
  better_errors (2.1.1) lib/better_errors/middleware.rb:84:in `protected_app_call'
  better_errors (2.1.1) lib/better_errors/middleware.rb:79:in `better_errors_call'
  better_errors (2.1.1) lib/better_errors/middleware.rb:57:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
  rack-contrib (1.4.0) lib/rack/contrib/response_headers.rb:17:in `call'
  meta_request (0.4.0) lib/meta_request/middlewares/headers.rb:16:in `call'
  web-console (2.3.0) lib/web_console/middleware.rb:28:in `block in call'
  web-console (2.3.0) lib/web_console/middleware.rb:18:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
  railties (4.2.4) lib/rails/rack/logger.rb:38:in `call_app'
  railties (4.2.4) lib/rails/rack/logger.rb:20:in `block in call'
  activesupport (4.2.4) lib/active_support/tagged_logging.rb:68:in `block in tagged'
  activesupport (4.2.4) lib/active_support/tagged_logging.rb:26:in `tagged'
  activesupport (4.2.4) lib/active_support/tagged_logging.rb:68:in `tagged'
  railties (4.2.4) lib/rails/rack/logger.rb:20:in `call'
  request_store (1.3.1) lib/request_store/middleware.rb:9:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/request_id.rb:21:in `call'
  rack (1.6.4) lib/rack/methodoverride.rb:22:in `call'
  rack (1.6.4) lib/rack/runtime.rb:18:in `call'
  activesupport (4.2.4) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
  rack (1.6.4) lib/rack/lock.rb:17:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/static.rb:116:in `call'
  rack (1.6.4) lib/rack/sendfile.rb:113:in `call'
  skylight (0.10.6) lib/skylight/middleware.rb:61:in `call'
  railties (4.2.4) lib/rails/engine.rb:518:in `call'
  railties (4.2.4) lib/rails/application.rb:165:in `call'
  rack (1.6.4) lib/rack/content_length.rb:15:in `call'
  puma (3.4.0) lib/puma/configuration.rb:224:in `call'
  puma (3.4.0) lib/puma/server.rb:569:in `handle_request'
  puma (3.4.0) lib/puma/server.rb:406:in `process_client'
  puma (3.4.0) lib/puma/server.rb:271:in `block in run'
  puma (3.4.0) lib/puma/thread_pool.rb:114:in `block in spawn_thread'

我自己写的唯一一行是eois控制器中的authorize@eoi行（在show操作中）。这是使用权威的关键部分。堆栈跟踪的其余部分来自我没有编写的内容，也不知道如何更改

 app/controllers/eois_controller.rb:20:in `show'

对可能重复标签的响应

---

另一个问题也是我贴的。他们要去不同的地方。在这篇文章中，我想可能是我写错了范围（我可能是）。在另一篇博文中，我试图阐述整个过程，看看是否有人能够帮助我理解我的错误所在

问题在于，您实际上没有为作用域提供用户id。在本例中：

user.id

这将永远不起作用。。。

User

类表示所有用户。。。请求它的id没有任何意义（您只需返回存储类方法的ruby对象的id）

在另一个。。。您使用了

user.id

，但实际上没有设置

user

变量的值（因此它总是会失败）

可能尝试将相关用户id作为参数传递到方法中，例如：

# define the `user` parameter as an argument to this scope-method
scope :projects_for_user, -> (user){ joins(:user_id).where('project.profile.user_id = ?', user.id) }

def resolve
  if user.has_role?(:admin)
    scope.all
  elsif user.id == @project.profile.user_id
    scope.projects_for_user(user) # pass the user into the method
  elsif user.present?
    scope.in_state(:publish)
  else 
    Project.none  
  end
end

---

注意：我没有（也不会）测试这段代码，它可能有打字错误或bug。。。试一试，修复错误。

谢谢塔林。那不行。错误显示：参数数量错误（给定2，应为0）。我不知道如何解决这个问题，当我不明白你为这个范围写的每一行的组成部分时。如果您知道任何可以帮助解构每个组件的简明英语资源，我可以尝试解决这个问题。无论如何，谢谢你的帮助。好的，一条简单的错误消息对我们解决它是没有用的。。。您能在服务器日志中查找错误消息之后出现的stacktrace（包含20-30个文件名的列表）吗。。。顶部的一个通常是抛出错误的实际文件，它通常以行号结尾。。。所以你可以确定错误的真正来源。至于范围。。。我使用了您的代码并对其进行了少量更改（我添加了用户变量is all）。不是你写的代码吗？是我写的Taryn。我不知道（用户）的意思或行为。我还没有在任何讨论如何构造范围的参考书中看到这一点。我也看不出它与我能找到的作为其他问题主题的范围的格式有什么关系。无论如何，谢谢你。恐怕我现在比今天早上更不清楚如何写示波器了。我很感激你的努力，谢谢塔林。这真是一个很有帮助的解释。我很感激。我添加了堆栈跟踪，以便您可以看到除一行之外的所有行都是我没有编写的行。我写的唯一一行是authorize@eoi，这是我尝试使用pundit时需要写的。可能是

ArgumentError - wrong number of arguments (given 2, expected 0):
  pundit (1.1.0) lib/pundit.rb:112:in `policy!'
  pundit (1.1.0) lib/pundit.rb:235:in `policy'
  pundit (1.1.0) lib/pundit.rb:194:in `authorize'
  app/controllers/eois_controller.rb:20:in `show'
  actionpack (4.2.4) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
  actionpack (4.2.4) lib/abstract_controller/base.rb:198:in `process_action'
  actionpack (4.2.4) lib/action_controller/metal/rendering.rb:10:in `process_action'
  actionpack (4.2.4) lib/abstract_controller/callbacks.rb:20:in `block in process_action'
  activesupport (4.2.4) lib/active_support/callbacks.rb:117:in `call'
  activesupport (4.2.4) lib/active_support/callbacks.rb:555:in `block (2 levels) in compile'
  activesupport (4.2.4) lib/active_support/callbacks.rb:505:in `call'
  activesupport (4.2.4) lib/active_support/callbacks.rb:92:in `__run_callbacks__'
  activesupport (4.2.4) lib/active_support/callbacks.rb:778:in `_run_process_action_callbacks'
  activesupport (4.2.4) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (4.2.4) lib/abstract_controller/callbacks.rb:19:in `process_action'
  actionpack (4.2.4) lib/action_controller/metal/rescue.rb:29:in `process_action'
  actionpack (4.2.4) lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
  activesupport (4.2.4) lib/active_support/notifications.rb:164:in `block in instrument'
  activesupport (4.2.4) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
  activesupport (4.2.4) lib/active_support/notifications.rb:164:in `instrument'
  actionpack (4.2.4) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
  actionpack (4.2.4) lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
  searchkick (1.3.0) lib/searchkick/logging.rb:153:in `process_action'
  activerecord (4.2.4) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
  actionpack (4.2.4) lib/abstract_controller/base.rb:137:in `process'
  actionview (4.2.4) lib/action_view/rendering.rb:30:in `process'
  actionpack (4.2.4) lib/action_controller/metal.rb:196:in `dispatch'
  actionpack (4.2.4) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
  actionpack (4.2.4) lib/action_controller/metal.rb:237:in `block in action'
  actionpack (4.2.4) lib/action_dispatch/routing/route_set.rb:76:in `dispatch'
  actionpack (4.2.4) lib/action_dispatch/routing/route_set.rb:45:in `serve'
  actionpack (4.2.4) lib/action_dispatch/journey/router.rb:43:in `block in serve'
  actionpack (4.2.4) lib/action_dispatch/journey/router.rb:30:in `serve'
  actionpack (4.2.4) lib/action_dispatch/routing/route_set.rb:821:in `call'
  omniauth (1.3.1) lib/omniauth/strategy.rb:186:in `call!'
  omniauth (1.3.1) lib/omniauth/strategy.rb:164:in `call'
  omniauth (1.3.1) lib/omniauth/strategy.rb:186:in `call!'
  omniauth (1.3.1) lib/omniauth/strategy.rb:164:in `call'
  omniauth (1.3.1) lib/omniauth/strategy.rb:186:in `call!'
  omniauth (1.3.1) lib/omniauth/strategy.rb:164:in `call'
  omniauth (1.3.1) lib/omniauth/strategy.rb:186:in `call!'
  omniauth (1.3.1) lib/omniauth/strategy.rb:164:in `call'
  meta_request (0.4.0) lib/meta_request/middlewares/app_request_handler.rb:13:in `call'
  meta_request (0.4.0) lib/meta_request/middlewares/meta_request_handler.rb:13:in `call'
  warden (1.2.6) lib/warden/manager.rb:35:in `block in call'
  warden (1.2.6) lib/warden/manager.rb:34:in `call'
  rack (1.6.4) lib/rack/etag.rb:24:in `call'
  rack (1.6.4) lib/rack/conditionalget.rb:25:in `call'
  rack (1.6.4) lib/rack/head.rb:13:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/flash.rb:260:in `call'
  rack (1.6.4) lib/rack/session/abstract/id.rb:225:in `context'
  rack (1.6.4) lib/rack/session/abstract/id.rb:220:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/cookies.rb:560:in `call'
  activerecord (4.2.4) lib/active_record/query_cache.rb:36:in `call'
  activerecord (4.2.4) lib/active_record/connection_adapters/abstract/connection_pool.rb:653:in `call'
  activerecord (4.2.4) lib/active_record/migration.rb:377:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
  activesupport (4.2.4) lib/active_support/callbacks.rb:88:in `__run_callbacks__'
  activesupport (4.2.4) lib/active_support/callbacks.rb:778:in `_run_call_callbacks'
  activesupport (4.2.4) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (4.2.4) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/reloader.rb:73:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
  better_errors (2.1.1) lib/better_errors/middleware.rb:84:in `protected_app_call'
  better_errors (2.1.1) lib/better_errors/middleware.rb:79:in `better_errors_call'
  better_errors (2.1.1) lib/better_errors/middleware.rb:57:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
  rack-contrib (1.4.0) lib/rack/contrib/response_headers.rb:17:in `call'
  meta_request (0.4.0) lib/meta_request/middlewares/headers.rb:16:in `call'
  web-console (2.3.0) lib/web_console/middleware.rb:28:in `block in call'
  web-console (2.3.0) lib/web_console/middleware.rb:18:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
  railties (4.2.4) lib/rails/rack/logger.rb:38:in `call_app'
  railties (4.2.4) lib/rails/rack/logger.rb:20:in `block in call'
  activesupport (4.2.4) lib/active_support/tagged_logging.rb:68:in `block in tagged'
  activesupport (4.2.4) lib/active_support/tagged_logging.rb:26:in `tagged'
  activesupport (4.2.4) lib/active_support/tagged_logging.rb:68:in `tagged'
  railties (4.2.4) lib/rails/rack/logger.rb:20:in `call'
  request_store (1.3.1) lib/request_store/middleware.rb:9:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/request_id.rb:21:in `call'
  rack (1.6.4) lib/rack/methodoverride.rb:22:in `call'
  rack (1.6.4) lib/rack/runtime.rb:18:in `call'
  activesupport (4.2.4) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
  rack (1.6.4) lib/rack/lock.rb:17:in `call'
  actionpack (4.2.4) lib/action_dispatch/middleware/static.rb:116:in `call'
  rack (1.6.4) lib/rack/sendfile.rb:113:in `call'
  skylight (0.10.6) lib/skylight/middleware.rb:61:in `call'
  railties (4.2.4) lib/rails/engine.rb:518:in `call'
  railties (4.2.4) lib/rails/application.rb:165:in `call'
  rack (1.6.4) lib/rack/content_length.rb:15:in `call'
  puma (3.4.0) lib/puma/configuration.rb:224:in `call'
  puma (3.4.0) lib/puma/server.rb:569:in `handle_request'
  puma (3.4.0) lib/puma/server.rb:406:in `process_client'
  puma (3.4.0) lib/puma/server.rb:271:in `block in run'
  puma (3.4.0) lib/puma/thread_pool.rb:114:in `block in spawn_thread'

 app/controllers/eois_controller.rb:20:in `show'

# define the `user` parameter as an argument to this scope-method
scope :projects_for_user, -> (user){ joins(:user_id).where('project.profile.user_id = ?', user.id) }

def resolve
  if user.has_role?(:admin)
    scope.all
  elsif user.id == @project.profile.user_id
    scope.projects_for_user(user) # pass the user into the method
  elsif user.present?
    scope.in_state(:publish)
  else 
    Project.none  
  end
end