Rails 4 - Pundit - 如何编写范围
Rails 4 - Pundit - how to write a scope
我正在尝试学习如何将 Pundit 与 Rails4 一起使用。在过去的 2 年里，我一直在努力学习这个，并且正在慢慢取得一点点进步。
我也在尝试学习如何编写作用域。我仍在努力弄清楚如何将建议翻译成简单的英语，以便我可以开始理解。
我陷入了权威政策使用的范围与我可以在模型中编写的一般范围 class 的交叉点。
我有 Uer、Profile 和 Project 的模型。
协会是：
用户
has_one :profile
简介
belongs_to :user
has_many :projects
项目
belongs_to :profile
我正在尝试编写允许不同用户查看不同项目的专家策略。我正在写一个范围内的政策，在专家中管理这个。
在我的项目模型中，我正在尝试编写可查找用户所有项目的范围。用简单的英语来说，我想在所有项目中搜索那些具有属于等于当前用户的用户 ID 的配置文件 ID 的项目。
在我的专家策略中，我正在尝试编写此解析方法：
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
我已经尝试了大约 100 种不同的方法来尝试在我的项目模型上编写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设计的 current_user，所以我不能在范围内使用它。这两个是我最好的尝试-都错了。
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) }
我学习这个的主要问题是我看不出如何将这条线分解成不同的部分。
据我所知，“:”之前的部分就是您要查找的内容。 “：”之后的位是您在 运行 范围内使用的实例。如果那是对的，那么我很困惑为什么我的第二次尝试没有成功（并且对第一次尝试中的连接语句也很困惑）。
如果有人可以用简单的英语解释如何编写范围，我相信我知道我想要查找什么，只是拼命迷失了如何编写查询来找到它。
目前，当我尝试使用我的项目策略时（我尝试在下面结合 Taryn 的建议 - 虽然我不理解范围的每个组成部分，所以我不确定它发生了什么）。
class ProjectPolicy < ApplicationPolicy
attr_reader :user, :record
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(user)
elsif user.present?
scope.in_state(:publish)
else
Project.none
end
end
end
def index?
true
end
def show?
true
end
private
def project
record
end
项目模型：
scope :projects_for_user, -> (user){ joins(:user_id).where('project.profile.user_id = ?', user.id) }
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
当我保存并尝试它时，它给出了一个错误：
wrong number of arguments (given 2, expected 0)
当我尝试查看项目索引或特定项目时返回此错误（因此我认为这与范围无关）。我不明白给出了哪两个论点来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 年 9 月 8 日开始 POST "/__better_errors/123578515c1e4e10/variables" for ::1 13:23:01 +1000
堆栈跟踪分析
我自己写的唯一一行是 eois 控制器中的 authorize @eoi 行（在 show 动作中）。这是使用专家的关键部分。堆栈跟踪的其余部分来自我没有写的东西，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 post 编辑的。他们要去不同的地方。在这个 post 中，我想也许我写错了范围（我可能是）。在另一个 post 中，我试图列出整个过程，看看是否有人能够帮助我理解我哪里出错了。
问题是您实际上并没有为范围提供用户 ID。在这一个中：User.id 这永远行不通...... User class 代表 所有 用户...... 它没有任何意义询问它的 ID（你只会得到存储 class 方法的 ruby-对象的 ID）。
在另一个...你使用 user.id 但实际上没有设置 user 变量的值（所以它总是会失败）。
也许尝试将相关用户 ID 作为参数实际传递到方法中，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）测试此代码，它可能有拼写错误或错误...试一试并修复错误。
我正在尝试学习如何将 Pundit 与 Rails4 一起使用。在过去的 2 年里，我一直在努力学习这个，并且正在慢慢取得一点点进步。
我也在尝试学习如何编写作用域。我仍在努力弄清楚如何将建议翻译成简单的英语，以便我可以开始理解。
我陷入了权威政策使用的范围与我可以在模型中编写的一般范围 class 的交叉点。
我有 Uer、Profile 和 Project 的模型。
协会是：
用户
has_one :profile
简介
belongs_to :user
has_many :projects
项目
belongs_to :profile
我正在尝试编写允许不同用户查看不同项目的专家策略。我正在写一个范围内的政策，在专家中管理这个。
在我的项目模型中，我正在尝试编写可查找用户所有项目的范围。用简单的英语来说，我想在所有项目中搜索那些具有属于等于当前用户的用户 ID 的配置文件 ID 的项目。
在我的专家策略中，我正在尝试编写此解析方法：
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
我已经尝试了大约 100 种不同的方法来尝试在我的项目模型上编写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设计的 current_user，所以我不能在范围内使用它。这两个是我最好的尝试-都错了。
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) }
我学习这个的主要问题是我看不出如何将这条线分解成不同的部分。
据我所知，“:”之前的部分就是您要查找的内容。 “：”之后的位是您在 运行 范围内使用的实例。如果那是对的，那么我很困惑为什么我的第二次尝试没有成功（并且对第一次尝试中的连接语句也很困惑）。
如果有人可以用简单的英语解释如何编写范围，我相信我知道我想要查找什么，只是拼命迷失了如何编写查询来找到它。
目前，当我尝试使用我的项目策略时（我尝试在下面结合 Taryn 的建议 - 虽然我不理解范围的每个组成部分，所以我不确定它发生了什么）。
class ProjectPolicy < ApplicationPolicy
attr_reader :user, :record
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(user)
elsif user.present?
scope.in_state(:publish)
else
Project.none
end
end
end
def index?
true
end
def show?
true
end
private
def project
record
end
项目模型：
scope :projects_for_user, -> (user){ joins(:user_id).where('project.profile.user_id = ?', user.id) }
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
当我保存并尝试它时，它给出了一个错误：
wrong number of arguments (given 2, expected 0)
当我尝试查看项目索引或特定项目时返回此错误（因此我认为这与范围无关）。我不明白给出了哪两个论点来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 年 9 月 8 日开始 POST "/__better_errors/123578515c1e4e10/variables" for ::1 13:23:01 +1000
堆栈跟踪分析
我自己写的唯一一行是 eois 控制器中的 authorize @eoi 行（在 show 动作中）。这是使用专家的关键部分。堆栈跟踪的其余部分来自我没有写的东西，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 post 编辑的。他们要去不同的地方。在这个 post 中，我想也许我写错了范围（我可能是）。在另一个 post 中，我试图列出整个过程，看看是否有人能够帮助我理解我哪里出错了。
问题是您实际上并没有为范围提供用户 ID。在这一个中：User.id 这永远行不通...... User class 代表 所有 用户...... 它没有任何意义询问它的 ID（你只会得到存储 class 方法的 ruby-对象的 ID）。
在另一个...你使用 user.id 但实际上没有设置 user 变量的值（所以它总是会失败）。
也许尝试将相关用户 ID 作为参数实际传递到方法中，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）测试此代码，它可能有拼写错误或错误...试一试并修复错误。