本文介绍了为什么 before_action :authorize 会因“参数数量错误"而失败?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我已将 Pundit 与 Devise 设置为对我的申请进行授权.在我的一个控制器中，我有 before_action :authorize.
I have set up Pundit together with Devise for authorization on my application. In one of my controllers, I have before_action :authorize.
然后我进行了以下测试:
I then have the following test:
describe SomeController do
before(:each) do
login_user(FactoryGirl.create(:user, :user_type => :admin))
end
describe "GET index" do
it "it retrieves the index" do
something = FactoryGirl.create(:Something)
get :index
assigns(:something).should eq([something])
end
end
end
我收到错误:
wrong number of arguments (0 for 1)
登录助手非常简单:
module ControllerMacros
def login_user(user)
if user.nil?
user = FactoryGirl.create(:user)
end
@request.env["devise.mapping"] = Devise.mappings[:user]
sign_in user
end
end
更新:堆栈跟踪:
Failure/Error: get :index
ArgumentError:
wrong number of arguments (0 for 1..2)
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/pundit-0.2.3/lib/pundit.rb:62:in `authorize'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.1.1/lib/active_support/callbacks.rb:424:in `block in make_lambda'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.1.1/lib/active_support/callbacks.rb:160:in `call'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.1.1/lib/active_support/callbacks.rb:160:in `block in halting'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.1.1/lib/active_support/callbacks.rb:149:in `call'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.1.1/lib/active_support/callbacks.rb:149:in `block in halting_and_conditional'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.1.1/lib/active_support/callbacks.rb:229:in `call'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.1.1/lib/active_support/callbacks.rb:229:in `block in halting'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.1.1/lib/active_support/callbacks.rb:149:in `call'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.1.1/lib/active_support/callbacks.rb:149:in `block in halting_and_conditional'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.1.1/lib/active_support/callbacks.rb:166:in `call'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.1.1/lib/active_support/callbacks.rb:166:in `block in halting'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.1.1/lib/active_support/callbacks.rb:166:in `call'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.1.1/lib/active_support/callbacks.rb:166:in `block in halting'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.1.1/lib/active_support/callbacks.rb:166:in `call'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.1.1/lib/active_support/callbacks.rb:166:in `block in halting'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.1.1/lib/active_support/callbacks.rb:86:in `call'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.1.1/lib/active_support/callbacks.rb:86:in `run_callbacks'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.1.1/lib/abstract_controller/callbacks.rb:19:in `process_action'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.1.1/lib/action_controller/metal/rescue.rb:29:in `process_action'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.1.1/lib/action_controller/metal/instrumentation.rb:31:in `block in process_action'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.1.1/lib/active_support/notifications.rb:159:in `block in instrument'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.1.1/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.1.1/lib/active_support/notifications.rb:159:in `instrument'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.1.1/lib/action_controller/metal/instrumentation.rb:30:in `process_action'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.1.1/lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.1.1/lib/active_record/railties/controller_runtime.rb:18:in `process_action'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.1.1/lib/abstract_controller/base.rb:136:in `process'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/actionview-4.1.1/lib/action_view/rendering.rb:30:in `process'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.1.1/lib/action_controller/test_case.rb:595:in `process'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.1.1/lib/action_controller/test_case.rb:64:in `process'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/devise-3.2.4/lib/devise/test_helpers.rb:19:in `block in process'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/devise-3.2.4/lib/devise/test_helpers.rb:72:in `catch'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/devise-3.2.4/lib/devise/test_helpers.rb:72:in `_catch_warden'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/devise-3.2.4/lib/devise/test_helpers.rb:19:in `process'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.1.1/lib/action_controller/test_case.rb:495:in `get'
# ./spec/controllers/SomeController_spec.rb:31:in `block (4 levels) in <top (required)>'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/example.rb:114:in `instance_eval'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/example.rb:114:in `block in run'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/extensions/instance_eval_with_args.rb:16:in `instance_exec'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/extensions/instance_eval_with_args.rb:16:in `instance_eval_with_args'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/example.rb:247:in `instance_eval_with_args'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/hooks.rb:106:in `block (2 levels) in run'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/example.rb:179:in `call'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/example.rb:179:in `run'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/extensions/instance_eval_with_args.rb:16:in `instance_exec'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/extensions/instance_eval_with_args.rb:16:in `instance_eval_with_args'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/example.rb:247:in `instance_eval_with_args'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/hooks.rb:106:in `block (2 levels) in run'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/hooks.rb:108:in `call'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/hooks.rb:108:in `run'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/hooks.rb:446:in `run_hook'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/example_group.rb:340:in `run_around_each_hooks'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/example.rb:256:in `with_around_each_hooks'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/example.rb:111:in `run'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/example_group.rb:390:in `block in run_examples'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/example_group.rb:386:in `map'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/example_group.rb:386:in `run_examples'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/example_group.rb:371:in `run'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/example_group.rb:372:in `block in run'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/example_group.rb:372:in `map'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/example_group.rb:372:in `run'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/example_group.rb:372:in `block in run'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/example_group.rb:372:in `map'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/example_group.rb:372:in `run'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/command_line.rb:28:in `block (2 levels) in run'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/command_line.rb:28:in `map'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/command_line.rb:28:in `block in run'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/reporter.rb:58:in `report'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/command_line.rb:25:in `run'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/runner.rb:80:in `run'
# /Users/Me/.rvm/gems/ruby-2.0.0-p247/gems/rspec-core-2.14.8/lib/rspec/core/runner.rb:17:in `block in autorun'
推荐答案
Pundit 的 authorize 方法不应作为 before_action 调用.before_action 调用一个没有参数的方法，authorize 接受一个模型对象和一个可选的权限名称.这就是为什么您会遇到错误.
Pundit's authorize method is not intended to be called as a before_action. before_action calls a method with no arguments, and authorize takes a model object and an optional permission name. That's why you're getting the error you are.
您没有展示足够的相关代码让我了解您接下来应该做什么，但我建议让 Pundit 在您的控制器操作中工作，然后再将其拉出到回调中.
You're not showing enough of the relevant code for me to see what you should do next, but I suggest getting Pundit to work in your controller action before pulling it out into a callback.
这里有一个正确使用 authorize 的例子:https://github.com/elabs/pundit
There is an example of the correct use of authorize here: https://github.com/elabs/pundit
这篇关于为什么 before_action :authorize 会因“参数数量错误"而失败?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！