ruby-on-rails - Rails - 未显示实际错误 - 显示带有 headers 数组的机架/etag 错误

Question

当我的 Rails 应用程序遇到任何错误时，我没有报告错误，而是收到相同的错误 "undefined method [] for nil:NilClass"无论触发的潜在错误是什么。无论我是否启用了 Better_errors gem，都会发生这种情况。
我认为这是因为升级到 Puma 4.3.5 但再次降级到 4.3.3 后错误仍然存​​在。
headers 数组为零导致 headers[CACHE_CONTROL] 在第 38 行失败。

callrack (2.2.3) lib/rack/etag.rb

33      original_body.close if original_body.respond_to?(:close)
34    end
35    headers[ETAG_STRING] = %(W/"#{digest}") if digest
36  end
37
38  unless headers[CACHE_CONTROL]
39    if digest
40      headers[CACHE_CONTROL] = @cache_control if @cache_control
41    else
42      headers[CACHE_CONTROL] = @no_cache_control if @no_cache_control
43    end

我正在使用以下 gem 列表:

actioncable (5.2.4.3, 5.2.3)
actionmailer (5.2.4.3, 5.2.3)
actionpack (5.2.4.3, 5.2.3)
actionview (5.2.4.3, 5.2.3)
active_model_serializers (0.10.10)
activejob (5.2.4.3, 5.2.3)
activemodel (5.2.4.3, 5.2.3)
activerecord (5.2.4.3, 5.2.3)
activestorage (5.2.4.3, 5.2.3)
activesupport (5.2.4.3, 5.2.3)
addressable (2.7.0)
akami (1.3.1)
animate-rails (1.0.10)
arel (9.0.0)
ast (2.4.1, 2.4.0)
attr_encrypted (3.1.0)
autoprefixer-rails (9.8.5, 9.7.4)
backports (3.16.1)
bcrypt (3.1.13)
better_errors (2.7.1, 2.5.1)
bigdecimal (default: 1.3.4)
binding_of_caller (0.8.0)
bootsnap (1.4.6, 1.4.5)
bootstrap-datepicker-rails (1.9.0.1)
bootstrap-sass (3.4.1)
bootstrap-select-rails (1.13.8)
bootstrap-tooltip-rails (0.1)
bootstrap_form (2.7.0)
bson (4.9.4, 4.7.1)
bson_ext (1.5.1)
builder (3.2.4)
bundler (default: 1.17.3)
bundler-unload (1.0.2)
cancancan (3.1.0, 3.0.2)
capybara (3.33.0, 3.31.0)
carrierwave (2.1.0)
carrierwave-base64 (2.8.1, 2.8.0)
carrierwave-i18n (0.2.0)
carrierwave-mongoid (1.3.0)
case_transform (0.2)
chunky_png (1.3.11)
cmath (default: 1.0.0)
coderay (1.1.3, 1.1.2)
coffee-rails (5.0.0)
coffee-script (2.4.1)
coffee-script-source (1.12.2)
concurrent-ruby (1.1.6)
connection_pool (2.2.3, 2.2.2)
crass (1.0.6) 
csv (default: 1.0.0) 
cuba (3.9.2)
cucumber (4.1.0, 3.1.2) 
cucumber-core (7.1.0, 3.2.1) 
cucumber-create-meta (1.0.0) 
cucumber-cucumber-expressions (10.2.1) 
cucumber-expressions (6.0.1) 
cucumber-gherkin (14.0.1)
cucumber-html-formatter (7.0.0) 
cucumber-messages (12.2.0)
cucumber-rails (2.1.0, 2.0.0) 
cucumber-tag-expressions (2.0.4)
cucumber-tag_expressions (1.1.1) 
cucumber-wire (3.1.0, 0.0.1) 
daemons (1.3.1) 
database_cleaner (1.8.5, 1.8.3) 
date (default: 1.0.0) 
dbm (default: 1.0.0) 
debug_inspector (0.0.3) 
devise (4.7.2, 4.7.1)
devise-bootstrap-views (1.1.0) 
devise-i18n (1.9.1, 1.9.0)
devise-two-factor (3.1.0) 
did_you_mean (1.2.0) 
diff-lcs (1.3)
domain_name (0.5.20190701) 
doorkeeper (4.4.3) 
doorkeeper-mongodb (4.2.0) 
down (5.1.1) 
encryptor (3.0.0) 
erubi (1.9.0) 
et-orbi (1.2.4, 1.2.2) 
etc (default: 1.0.0) 
execjs (2.7.0) 
executable-hooks (1.6.0) 
exonio (0.5.4, 0.5.3) 
factory_bot (6.1.0, 5.1.1) 
factory_bot_rails (6.1.0, 5.1.1) 
faker (2.13.0, 2.10.2) 
fcntl (default: 1.0.0) 
ffi (1.13.1, 1.12.2) 
fiddle (default: 1.0.0) 
fileutils (default: 1.0.2)
flamegraph (0.9.5) 
font-awesome-sass (5.13.0, 5.12.0) 
fugit (1.3.6, 1.3.3) 
gdbm (default: 2.0.0) 
gem-wrappers (1.4.0) 
geocoder (1.6.3, 1.6.1) 
gherkin (5.1.0) 
globalid (0.4.2) 
google_custom_search_api (2.0.0) 
gyoku (1.3.1) 
http-accept (1.7.0) 
http-cookie (1.0.3)
httparty (0.18.1, 0.18.0) 
httpi (2.4.5, 2.4.4) 
i18n (1.8.3, 1.8.2)
image_processing (1.11.0, 1.10.3) 
interactor (3.1.2) 
io-console (default: 0.4.6) 
ipaddr (default: 1.2.0) 
iye (1.1.1) 
jaro_winkler (1.5.4) 
jasny-bootstrap-rails (3.1.3) 
jbuilder (2.10.0)
jquery-easing-rails (0.0.2) 
jquery-rails (4.4.0, 4.3.5)
jquery-tablesorter (1.27.2, 1.27.1) 
jquery-ui-rails (6.0.1) 
json (2.3.1, 2.3.0, default: 2.1.0) 
jsonapi-renderer (0.2.2) 
jwt (2.2.1)
launchy (2.5.0, 2.4.3) 
letter_opener (1.7.0) 
listen (3.2.1)
localized_fields (0.1.0) 
loofah (2.6.0, 2.4.0) 
mail (2.7.1) 
marcel (0.3.3) 
material_icons (2.2.1) 
materialize-form (1.0.8)
materialize-sass (0.99.0) 
memory_profiler (0.9.14) 
method_source (1.0.0, 0.9.2) 
middleware (0.1.0) 
mime-types (3.3.1) 
mime-types-data (3.2020.0512, 3.2019.1009) 
mimemagic (0.3.5, 0.3.4) 
mini_magick (4.10.1) 
mini_mime (1.0.2) 
mini_portile2 (2.4.0) 
minitest (5.14.1, 5.14.0, 5.10.3) 
mollie-api-ruby (4.7.1) 
momentjs-rails (2.20.1) 
mongo (2.12.1, 2.11.3) 
mongo_session_store (3.2.1, 3.2.0) 
mongoid (6.4.4)
mongoid-compatibility (0.5.1) 
mongoid-grid_fs (2.4.0)
mongoid-rspec (4.1.0, 4.0.1) 
msgpack (1.3.3) 
multi_json (1.14.1) 
multi_test (0.1.2)
multi_xml (0.6.0) 
nested_form (0.3.2) 
net-telnet (0.1.1) 
netrc (0.11.0) 
nio4r (2.5.2) 
nokogiri (1.10.10, 1.10.8) 
nori (2.6.0)
okcomputer (1.18.2, 1.18.1)
openssl (default: 2.1.2) 
orm_adapter (0.5.0) 
parallel (1.19.2, 1.19.1) 
parser (2.7.1.4, 2.7.0.2)
pdfjs_viewer-rails (0.3.1) 
pdfkit (0.8.4.3.1, 0.8.4.1) 
popper_js (1.16.0) 
power_assert (1.1.1) 
protobuf-cucumber (3.10.8) 
pry (0.13.1, 0.12.2) 
pry-rails (0.3.9) 
psych (3.1.0, default: 3.0.2) 
public_suffix (4.0.5, 4.0.3) 
puma (4.3.5, 4.3.3) 
raabro (1.3.1, 1.1.6) 
rack (2.2.3, 2.2.2) 
rack-mini-profiler (2.0.2, 1.1.6) 
rack-protection (2.0.8.1) 
rack-test (1.1.0) rails (5.2.4.3, 5.2.3) 
rails-dom-testing (2.0.3)
rails-html-sanitizer (1.3.0) 
rails-i18n (5.1.3) 
rails-static-router (1.0.3) 
rails_12factor (0.0.3) 
rails_bootstrap_sortable (2.0.7)
rails_serve_static_assets (0.0.5) 
rails_stdout_logging (0.0.5)
railties (5.2.4.3, 5.2.3) 
rainbow (3.0.0) 
rake (13.0.1, 12.3.3)
rb-fsevent (0.10.4, 0.10.3) 
rb-inotify (0.10.1)
rdoc (default: 6.0.1.1) 
redis (4.2.1, 4.1.3) 
regexp_parser (1.7.1, 1.7.0) 
responders (3.0.1, 3.0.0) 
rest-client (2.1.0) 
rexml (3.2.4) 
rotp (2.1.2) 
rqrcode (1.1.2) 
rqrcode_core (0.1.2, 0.1.1) 
rspec (3.9.0) 
rspec-core (3.9.2, 3.9.1) 
rspec-expectations (3.9.2, 3.9.0) 
rspec-mocks (3.9.1) 
rspec-rails (3.9.1, 3.9.0) 
rspec-support (3.9.3, 3.9.2) 
rubocop (0.88.0, 0.80.0) 
rubocop-ast (0.1.0) 
ruby-prof (1.4.1, 1.3.0)
ruby-progressbar (1.10.1) 
ruby-vips (2.0.17) 
rubygems-bundler (1.4.5)
rufus-scheduler (3.6.0) 
rvm (1.11.3.9) 
sass (3.7.4) 
sass-listen (4.0.0) 
sass-rails (5.1.0) 
sassc (2.4.0, 2.2.1) 
sassc-rails (2.1.2)
savon (2.12.1, 2.12.0) 
scanf (default: 1.0.0) 
sdbm (default: 1.0.0)
sidekiq (5.2.2) 
simple-form-datepicker (0.1.3) 
simple_calendar (2.4.1, 2.3.0) 
simple_form (5.0.2) 
smarter_csv (1.2.6) 
socksify (1.7.1) 
spring (2.1.0)
sprockets (3.7.2) 
sprockets-rails (3.2.1)
stackprof (0.2.15) 
stringio (default: 0.0.1) 
strscan (default: 1.0.0)
summernote-rails (0.8.12.0) 
sys-uname (1.2.1) 
test-unit (3.2.7) 
thor (1.0.1) 
thread_safe (0.3.6) 
tilt (2.0.10) 
time_difference (0.7.0)
tzinfo (1.2.7, 1.2.6) 
uglifier (4.2.0) 
unf (0.1.4) 
unf_ext (0.0.7.7, 0.0.7.6) 
unicode-display_width (1.7.0, 1.6.1) 
warden (1.2.8) 
wasabi (3.5.0) 
webrick (default: 1.4.2) 
websocket-driver (0.7.3, 0.7.1)
websocket-extensions (0.1.5, 0.1.4) 
wicked (1.3.4)
wkhtmltopdf-binary-edge (0.12.5.1) 
wkhtmltopdf-heroku (2.12.5.0)
xmlrpc (0.3.0)
xpath (3.2.0) 
zlib (default: 1.0.0)

这些是使用最新更新完成的 gem 更改:

Installing i18n 1.8.3 (was 1.8.2)
Installing minitest 5.14.1 (was 5.14.0)
Installing tzinfo 1.2.7 (was 1.2.6)
Installing nokogiri 1.10.10 (was 1.10.8) with native extensions
Installing loofah 2.6.0 (was 2.4.0)
Installing rack 2.2.3 (was 2.2.2)
Installing websocket-extensions 0.1.5 (was 0.1.4)
Installing websocket-driver 0.7.3 (was 0.7.1) with native extensions
Installing mimemagic 0.3.5 (was 0.3.4)
Installing public_suffix 4.0.5 (was 4.0.3)
Installing method_source 1.0.0 (was 0.9.2)
Installing ast 2.4.1 (was 2.4.0)
Installing autoprefixer-rails 9.8.5 (was 9.7.4)
Installing coderay 1.1.3 (was 1.1.2)
Installing better_errors 2.7.1 (was 2.5.1)
Installing bootsnap 1.4.6 (was 1.4.5) with native extensions
Installing ffi 1.13.1 (was 1.12.2) with native extensions
Installing sassc 2.4.0 (was 2.2.1) with native extensions
Installing bson 4.9.4 (was 4.7.1) with native extensions
Installing cancancan 3.1.0 (was 3.0.2)
Installing regexp_parser 1.7.1 (was 1.7.0)
Installing capybara 3.33.0 (was 3.31.0)
Installing image_processing 1.11.0 (was 1.10.3)
Installing mime-types-data 3.2020.0512 (was 3.2019.1009)
Installing carrierwave-base64 2.8.1 (was 2.8.0)
Installing mongo 2.12.1 (was 2.11.3)
Installing connection_pool 2.2.3 (was 2.2.2)
Installing cucumber-core 7.1.0 (was 3.2.1)
Installing cucumber-wire 3.1.0 (was 0.0.1)
Installing cucumber 4.1.0 (was 3.1.2)
Installing cucumber-rails 2.1.0 (was 2.0.0)
Installing database_cleaner 1.8.5 (was 1.8.3)
Installing responders 3.0.1 (was 3.0.0)
Installing devise 4.7.2 (was 4.7.1)
Installing devise-i18n 1.9.1 (was 1.9.0)
Installing unf_ext 0.0.7.7 (was 0.0.7.6) with native extensions
Installing et-orbi 1.2.4 (was 1.2.2)
Installing exonio 0.5.4 (was 0.5.3)
Installing factory_bot 6.1.0 (was 5.1.1)
Installing factory_bot_rails 6.1.0 (was 5.1.1)
Installing faker 2.13.0 (was 2.10.2)
Installing font-awesome-sass 5.13.0 (was 5.12.0)
Installing raabro 1.3.1 (was 1.1.6)
Installing fugit 1.3.6 (was 1.3.3)
Installing geocoder 1.6.3 (was 1.6.1)
Installing httparty 0.18.1 (was 0.18.0)
Installing httpi 2.4.5 (was 2.4.4)
Installing jquery-rails 4.4.0 (was 4.3.5)
Installing jquery-tablesorter 1.27.2 (was 1.27.1)
Installing json 2.3.1 (was 2.3.0) with native extensions
Installing launchy 2.5.0 (was 2.4.3)
Installing rb-fsevent 0.10.4 (was 0.10.3)
Installing mongo_session_store 3.2.1 (was 3.2.0)
Installing rspec-support 3.9.3 (was 3.9.2)
Installing rspec-core 3.9.2 (was 3.9.1)
Installing rspec-expectations 3.9.2 (was 3.9.0)
Installing mongoid-rspec 4.1.0 (was 4.0.1)
Installing okcomputer 1.18.2 (was 1.18.1)
Installing parallel 1.19.2 (was 1.19.1)
Installing parser 2.7.1.4 (was 2.7.0.2)
Installing pdfkit 0.8.4.3.1 (was 0.8.4.1)
Installing pry 0.13.1 (was 0.12.2)
Installing puma 4.3.5 (was 4.3.3) with native extensions
Installing rack-mini-profiler 2.0.2 (was 1.1.6)
Installing redis 4.2.1 (was 4.1.3)
Installing rqrcode_core 0.1.2 (was 0.1.1)
Installing rspec-rails 3.9.1 (was 3.9.0)
Installing unicode-display_width 1.7.0 (was 1.6.1)
Installing rubocop 0.88.0 (was 0.80.0)
Installing ruby-prof 1.4.1 (was 1.3.0) with native extensions
Installing savon 2.12.1 (was 2.12.0)
Installing simple_calendar 2.4.1 (was 2.3.0)

我手动降级了我认为会产生影响的 gem ，但没有区别。

gem 'rails', '5.2.3'
gem 'puma', '4.3.3'
gem 'rack', '2.2.2'
gem 'websocket-extensions', '0.1.4'
gem 'websocket-driver', '0.7.1' 
gem 'connection_pool', '2.2.2'
gem 'httparty', '0.18.0'
gem 'better_errors', '2.5.1'
gem 'rack-mini-profiler', '1.1.6'

Answer 1

我终于找到了我这边的错误，它与 pdfkit gem 相关:
https://github.com/rack/rack/issues/1698
您需要暂时将 pdfkit 锁定到 0.8.4.2