自從升級到 Rails 6 后，我開始收到此錯誤：（ActionDispatch::Http::MimeNegotiation::InvalidType“ ！/！ ”不是有效的 MIME 型別）。
在回溯中我有
/GEM_ROOT/gems/actionpack-6.1.4.4/lib/action_dispatch/http/mime_negotiation.rb:55 → rescue in block in accepts
/GEM_ROOT/gems/actionpack-6.1.4.4/lib/action_dispatch/http/mime_negotiation.rb:46 → block in accepts
/GEM_ROOT/gems/rack-2.2.3/lib/rack/request.rb:69 → fetch
/GEM_ROOT/gems/rack-2.2.3/lib/rack/request.rb:69 → fetch_header
/GEM_ROOT/gems/actionpack-6.1.4.4/lib/action_dispatch/http/mime_negotiation.rb:45 → accepts
/GEM_ROOT/gems/actionpack-6.1.4.4/lib/action_dispatch/http/mime_negotiation.rb:74 → block in formats
/GEM_ROOT/gems/rack-2.2.3/lib/rack/request.rb:69 → fetch
/GEM_ROOT/gems/rack-2.2.3/lib/rack/request.rb:69 → fetch_header
/GEM_ROOT/gems/actionpack-6.1.4.4/lib/action_dispatch/http/mime_negotiation.rb:70 → formats
/GEM_ROOT/gems/actionpack-6.1.4.4/lib/action_dispatch/http/mime_negotiation.rb:66 → format
/GEM_ROOT/gems/actionpack-6.1.4.4/lib/action_controller/metal/instrumentation.rb:26 → process_action
/GEM_ROOT/gems/actionpack-6.1.4.4/lib/action_controller/metal/params_wrapper.rb:249 → process_action
/GEM_ROOT/gems/activerecord-6.1.4.4/lib/active_record/railties/controller_runtime.rb:27 → process_action
/GEM_ROOT/gems/actionpack-6.1.4.4/lib/abstract_controller/base.rb:165 → process
這種 MIME 型別是什么意思？以及如何解決這個錯誤？
uj5u.com熱心網友回復：
defaults: { format: 'js' }它幫助我添加routes.rb：
get 'user/card', to: 'user#card', defaults: { format: 'js' }
我在這個動作中只有js格式供查看。我認為它在類似情況下會有所幫助。
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