ruby-grape / ruby-grape/grape-swagger

undefined method `[]=' for nil:NilClass

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Description

Hello,

I have updated grape from 0.19.2 to 1.2.3 and grape-swagger from 0.25.3 to 0.32.1 and now I got a 500 error undefined method []= for nil::NilClass.

Can anyone help me please ? ^^"

here is the full backtrace :

`NoMethodError at /0.1/swagger_doc

undefined method `[]=' for nil:NilClass

app/api/api_cors.rb, line 25

   20       @app = app
   21     end
   22   
   23     def call(env)
   24       if env['REQUEST_METHOD'] != 'OPTIONS'
>  25         @app.call(env)
   26       else
   27         Rack::Response.new([nil], 204)
   28       end
   29     end
   30   end

App backtrace

  • app/api/api_cors.rb:25:in `call'
  • app/api/api_logger.rb:33:in `block in call'
  • app/api/api_logger.rb:32:in `call'
  • app/middleware/reseller_by_host.rb:26:in `call'

Full backtrace

  • grape-swagger (0.32.1) lib/grape-swagger/endpoint.rb:251:in `success_codes_from_route'
  • grape-swagger (0.32.1) lib/grape-swagger/endpoint.rb:236:in `http_codes_from_route'
  • grape-swagger (0.32.1) lib/grape-swagger/endpoint.rb:198:in `response_object'
  • grape-swagger (0.32.1) lib/grape-swagger/endpoint.rb:124:in `method_object'
  • grape-swagger (0.32.1) lib/grape-swagger/endpoint.rb:104:in `block in path_item'
  • grape-swagger (0.32.1) lib/grape-swagger/endpoint.rb:98:in `path_item'
  • grape-swagger (0.32.1) lib/grape-swagger/endpoint.rb:83:in `block in path_and_definition_objects'
  • grape-swagger (0.32.1) lib/grape-swagger/endpoint.rb:81:in `path_and_definition_objects'
  • grape-swagger (0.32.1) lib/grape-swagger/doc_methods.rb:57:in `block in setup'
  • grape-swagger (0.32.1) lib/grape-swagger/doc_methods.rb:71:in `block in setup'
  • grape (1.2.3) lib/grape/endpoint.rb:57:in `block (2 levels) in generate_api_method'
  • activesupport (4.2.11) lib/active_support/notifications.rb:166:in `instrument'
  • grape (1.2.3) lib/grape/endpoint.rb:56:in `block in generate_api_method'
  • grape (1.2.3) lib/grape/endpoint.rb:263:in `block in run'
  • activesupport (4.2.11) lib/active_support/notifications.rb:166:in `instrument'
  • grape (1.2.3) lib/grape/endpoint.rb:243:in `run'
  • grape (1.2.3) lib/grape/endpoint.rb:314:in `block in build_stack'
  • grape (1.2.3) lib/grape/middleware/base.rb:31:in `call!'
  • grape (1.2.3) lib/grape/middleware/base.rb:24:in `call'
  • grape (1.2.3) lib/grape/middleware/base.rb:31:in `call!'
  • grape (1.2.3) lib/grape/middleware/base.rb:24:in `call'
  • grape (1.2.3) lib/grape/middleware/error.rb:38:in `block in call!'
  • grape (1.2.3) lib/grape/middleware/error.rb:37:in `call!'
  • grape (1.2.3) lib/grape/middleware/base.rb:24:in `call'
  • rack (1.6.11) lib/rack/head.rb:13:in `call'
  • grape (1.2.3) lib/grape/endpoint.rb:227:in `call!'
  • grape (1.2.3) lib/grape/endpoint.rb:221:in `call'
  • grape (1.2.3) lib/grape/router/route.rb:72:in `exec'
  • grape (1.2.3) lib/grape/router.rb:121:in `process_route'
  • grape (1.2.3) lib/grape/router.rb:74:in `block in identity'
  • grape (1.2.3) lib/grape/router.rb:93:in `transaction'
  • grape (1.2.3) lib/grape/router.rb:72:in `identity'
  • grape (1.2.3) lib/grape/router.rb:57:in `block in call'
  • grape (1.2.3) lib/grape/router.rb:137:in `with_optimization'
  • grape (1.2.3) lib/grape/router.rb:56:in `call'
  • grape (1.2.3) lib/grape/api/instance.rb:131:in `call'
  • grape (1.2.3) lib/grape/api/instance.rb:57:in `call!'
  • grape (1.2.3) lib/grape/api/instance.rb:52:in `call'
  • grape (1.2.3) lib/grape/api.rb:51:in `call'
  • app/api/api_cors.rb:25:in `call'
  • app/api/api_logger.rb:33:in `block in call'
  • activesupport (4.2.11) lib/active_support/notifications.rb:164:in `block in instrument'
  • activesupport (4.2.11) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
  • activesupport (4.2.11) lib/active_support/notifications.rb:164:in `instrument'
  • app/api/api_logger.rb:32:in `call'
  • rack (1.6.11) lib/rack/builder.rb:153:in `call'
  • actionpack (4.2.11) lib/action_dispatch/routing/mapper.rb:51:in `serve'
  • actionpack (4.2.11) lib/action_dispatch/journey/router.rb:43:in `block in serve'
  • actionpack (4.2.11) lib/action_dispatch/journey/router.rb:30:in `serve'
  • actionpack (4.2.11) lib/action_dispatch/routing/route_set.rb:817:in `call'
  • browser (2.5.3) lib/browser/middleware.rb:54:in `run_app'
  • browser (2.5.3) lib/browser/middleware.rb:34:in `call'
  • http_accept_language (2.1.1) lib/http_accept_language/middleware.rb:14:in `call'
  • bullet (5.9.0) lib/bullet/rack.rb:12:in `call'
  • app/middleware/reseller_by_host.rb:26:in `call'
  • rack-cors (1.0.2) lib/rack/cors.rb:97:in `call'
  • rack (1.6.11) lib/rack/config.rb:17:in `call'
  • warden (1.2.7) lib/warden/manager.rb:36:in `block in call'
  • warden (1.2.7) lib/warden/manager.rb:35:in `call'
  • rack (1.6.11) lib/rack/etag.rb:24:in `call'
  • rack (1.6.11) lib/rack/conditionalget.rb:25:in `call'
  • rack (1.6.11) lib/rack/head.rb:13:in `call'
  • actionpack (4.2.11) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
  • actionpack (4.2.11) lib/action_dispatch/middleware/flash.rb:260:in `call'
  • rack (1.6.11) lib/rack/session/abstract/id.rb:225:in `context'
  • rack (1.6.11) lib/rack/session/abstract/id.rb:220:in `call'
  • actionpack (4.2.11) lib/action_dispatch/middleware/cookies.rb:560:in `call'
  • activerecord (4.2.11) lib/active_record/query_cache.rb:36:in `call'
  • activerecord (4.2.11) lib/active_record/connection_adapters/abstract/connection_pool.rb:653:in `call'
  • activerecord (4.2.11) lib/active_record/migration.rb:377:in `call'
  • actionpack (4.2.11) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
  • activesupport (4.2.11) lib/active_support/callbacks.rb:88:in `run_callbacks'
  • activesupport (4.2.11) lib/active_support/callbacks.rb:778:in `_run_call_callbacks'
  • activesupport (4.2.11) lib/active_support/callbacks.rb:81:in `run_callbacks'
  • actionpack (4.2.11) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
  • actionpack (4.2.11) lib/action_dispatch/middleware/reloader.rb:73:in `call'
  • actionpack (4.2.11) lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
  • better_errors (2.5.0) lib/better_errors/middleware.rb:84:in `protected_app_call'
  • better_errors (2.5.0) lib/better_errors/middleware.rb:79:in `better_errors_call'
  • better_errors (2.5.0) lib/better_errors/middleware.rb:57:in `call'
  • actionpack (4.2.11) lib/action_dispatch/middleware/debug_exceptions.rb:17: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 (4.2.11) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
  • lograge (0.10.0) lib/lograge/rails_ext/rack/logger.rb:15:in `call_app'
  • railties (4.2.11) lib/rails/rack/logger.rb:20:in `block in call'
  • activesupport (4.2.11) lib/active_support/tagged_logging.rb:68:in `block in tagged'
  • activesupport (4.2.11) lib/active_support/tagged_logging.rb:26:in `tagged'
  • activesupport (4.2.11) lib/active_support/tagged_logging.rb:68:in `tagged'
  • railties (4.2.11) lib/rails/rack/logger.rb:20:in `call'
  • request_store (1.4.1) lib/request_store/middleware.rb:19:in `call'
  • actionpack (4.2.11) lib/action_dispatch/middleware/request_id.rb:21:in `call'
  • rack (1.6.11) lib/rack/methodoverride.rb:22:in `call'
  • rack (1.6.11) lib/rack/runtime.rb:18:in `call'
  • activesupport (4.2.11) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
  • rack (1.6.11) lib/rack/lock.rb:17:in `call'
  • actionpack (4.2.11) lib/action_dispatch/middleware/static.rb:120:in `call'
  • rack (1.6.11) lib/rack/sendfile.rb:113:in `call'
  • railties (4.2.11) lib/rails/engine.rb:518:in `call'
  • railties (4.2.11) lib/rails/application.rb:165:in `call'
  • rack (1.6.11) lib/rack/deflater.rb:35:in `call'
  • rack (1.6.11) lib/rack/content_length.rb:15:in `call'
  • puma (3.12.0) lib/puma/configuration.rb:225:in `call'
  • puma (3.12.0) lib/puma/server.rb:658:in `handle_request'
  • puma (3.12.0) lib/puma/server.rb:472:in `process_client'
  • puma (3.12.0) lib/puma/server.rb:332:in `block in run'
  • puma (3.12.0) lib/puma/thread_pool.rb:133:in block in spawn_thread'
    In my application.rb, i have Rack::cors enabled like this :
config.middleware.insert_before 0, 'Rack::Cors' do
    allow do
      origins '*'
      resource '/api-web/0.1/*', headers: :any, methods: [:get, :post, :options, :put, :delete, :patch]
      resource '/api/0.1/*', headers: :any, methods: [:get, :post, :options, :put, :delete, :patch]
    end
end
config.middleware.use ::ResellerByHost

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start at grape-swagger's lib/grape-swagger/endpoint.rb, especially success_codes_from_route, using the reported GET /0.1/swagger_doc failure as the reproduction. Compare behavior across the stated Grape and grape-swagger upgrades and trace the nil value from the full backtrace. Done means the Swagger endpoint responds without NoMethodError and produces its documentation.

Written by the indexing model from the issue text.

Assessment

Tech stack
ruby
Domain
api, documentation
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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