[英]NoMethodError with Rails app deployed to Heroku (When calling .create on model)
我正在編寫一個 Ruby on Rails web 應用程序，以部署在 Heroku 上。
開發數據庫為 SQLite，生產數據庫為 PostgreSQL。
一切都在開發和測試環境中本地工作，並在 Heroku 上工作，直到最后一批修訂。 突然，試圖創建客戶 model 的實例正在拋出
'NoMethodError undefined method `each' for nil:nilclass'.
遷移肯定已經運行，我嘗試過 pg:reset 和重新運行遷移，我還嘗試過重新啟動 heroku。
如果我在 heroku 上打開 rails 控制台並嘗試調用以下任何方法，我會收到相同的錯誤
Customer.count Customer.create(...) Customer.new
任何人都可以幫助解決這個問題嗎？
編輯：
運行 rails db:migrate with Postgres DB 時的 Stacktrace（SQLite 沒有錯誤）
** Invoke db:_dump (first_time)
** Execute db:_dump
** Invoke db:schema:dump (first_time)
** Invoke db:load_config
** Execute db:schema:dump
rails aborted!
NoMethodError: undefined method `each' for nil:NilClass
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/descriptive_statistics-2.5.1/lib/descriptive_statistics/support/convert.rb:37:in `to_array'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/descriptive_statistics-2.5.1/lib/descriptive_statistics/support/convert.rb:8:in `convert'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/descriptive_statistics-2.5.1/lib/descriptive_statistics/sum.rb:3:in `sum'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activesupport-6.0.3.4/lib/active_support/core_ext/enumerable.rb:185:in `sum'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activerecord-6.0.3.4/lib/active_record/connection_adapters/postgresql/schema_statements.rb:659:in `sequence_name_from_parts'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activerecord-6.0.3.4/lib/active_record/connection_adapters/postgresql/schema_statements.rb:631:in `new_column_from_field'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activerecord-6.0.3.4/lib/active_record/connection_adapters/abstract/schema_statements.rb:115:in `block in columns'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activerecord-6.0.3.4/lib/active_record/connection_adapters/abstract/schema_statements.rb:114:in `map'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activerecord-6.0.3.4/lib/active_record/connection_adapters/abstract/schema_statements.rb:114:in `columns'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activerecord-6.0.3.4/lib/active_record/schema_dumper.rb:112:in `table'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activerecord-6.0.3.4/lib/active_record/schema_dumper.rb:100:in `block in tables'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activerecord-6.0.3.4/lib/active_record/schema_dumper.rb:99:in `each'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activerecord-6.0.3.4/lib/active_record/schema_dumper.rb:99:in `tables'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activerecord-6.0.3.4/lib/active_record/schema_dumper.rb:44:in `dump'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activerecord-6.0.3.4/lib/active_record/schema_dumper.rb:28:in `dump'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activerecord-6.0.3.4/lib/active_record/tasks/database_tasks.rb:377:in `block in dump_schema'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activerecord-6.0.3.4/lib/active_record/tasks/database_tasks.rb:376:in `open'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activerecord-6.0.3.4/lib/active_record/tasks/database_tasks.rb:376:in `dump_schema'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activerecord-6.0.3.4/lib/active_record/railties/databases.rake:392:in `block (4 levels) in <main>'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activerecord-6.0.3.4/lib/active_record/railties/databases.rake:390:in `each'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activerecord-6.0.3.4/lib/active_record/railties/databases.rake:390:in `block (3 levels) in <main>'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/task.rb:281:in `block in execute'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/task.rb:281:in `each'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/task.rb:281:in `execute'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/task.rb:219:in `block in invoke_with_call_chain'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/task.rb:199:in `synchronize'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/task.rb:199:in `invoke_with_call_chain'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/task.rb:188:in `invoke'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activerecord-6.0.3.4/lib/active_record/railties/databases.rake:97:in `block (2 levels) in <main>'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/task.rb:281:in `block in execute'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/task.rb:281:in `each'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/task.rb:281:in `execute'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/task.rb:219:in `block in invoke_with_call_chain'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/task.rb:199:in `synchronize'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/task.rb:199:in `invoke_with_call_chain'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/task.rb:188:in `invoke'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activerecord-6.0.3.4/lib/active_record/railties/databases.rake:88:in `block (2 levels) in <main>'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/task.rb:281:in `block in execute'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/task.rb:281:in `each'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/task.rb:281:in `execute'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/task.rb:219:in `block in invoke_with_call_chain'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/task.rb:199:in `synchronize'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/task.rb:199:in `invoke_with_call_chain'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/task.rb:188:in `invoke'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/application.rb:160:in `invoke_task'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/application.rb:116:in `block (2 levels) in top_level'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/application.rb:116:in `each'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/application.rb:116:in `block in top_level'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/application.rb:125:in `run_with_threads'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/application.rb:110:in `top_level'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-6.0.3.4/lib/rails/commands/rake/rake_command.rb:23:in `block in perform'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rake-13.0.1/lib/rake/application.rb:186:in `standard_exception_handling'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-6.0.3.4/lib/rails/commands/rake/rake_command.rb:20:in `perform'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-6.0.3.4/lib/rails/command.rb:48:in `invoke'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/railties-6.0.3.4/lib/rails/commands.rb:18:in `<main>'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activesupport-6.0.3.4/lib/active_support/dependencies.rb:324:in `block in require'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activesupport-6.0.3.4/lib/active_support/dependencies.rb:291:in `load_dependency'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/activesupport-6.0.3.4/lib/active_support/dependencies.rb:324:in `require'
/Users/harilimaye/Documents/CompSci/Year 2/SEG/smg/alpaca_online_banking/bin/rails:9:in `<top (required)>'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/spring-2.1.1/lib/spring/client/rails.rb:28:in `load'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/spring-2.1.1/lib/spring/client/rails.rb:28:in `call'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/spring-2.1.1/lib/spring/client/command.rb:7:in `call'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/spring-2.1.1/lib/spring/client.rb:30:in `run'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/spring-2.1.1/bin/spring:49:in `<top (required)>'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/spring-2.1.1/lib/spring/binstub.rb:11:in `load'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/spring-2.1.1/lib/spring/binstub.rb:11:in `<top (required)>'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:72:in `require'
/Users/harilimaye/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:72:in `require'
/Users/harilimaye/Documents/CompSci/Year 2/SEG/smg/alpaca_online_banking/bin/spring:15:in `<top (required)>'
bin/rails:3:in `load'
bin/rails:3:in `<main>'
所以事實證明問題是由於在我的 gem 文件中包含gem 'transaction_faker' ，它添加了模塊 descriptive_statistics （問題的根源）。 我的猜測是它必須覆蓋從遷移到 Postgres 的轉換中使用的 Enumerable 模塊的 sum 方法，或者類似的東西。
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