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railsでDBが初期でpsqlになる

退会済みユーザー

退会済みユーザー

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Ruby

Rubyはプログラミング言語のひとつで、オープンソース、オブジェクト指向のプログラミング開発に対応しています。

PostgreSQL

PostgreSQLはオープンソースのオブジェクトリレーショナルデータベース管理システムです。 Oracle Databaseで使われるPL/SQLを参考に実装されたビルトイン言語で、Windows、 Mac、Linux、UNIX、MSなどいくつものプラットフォームに対応しています。

Ruby on Rails

Ruby on Railsは、オープンソースのWebアプリケーションフレームワークです。「同じことを繰り返さない」というRailsの基本理念のもと、他のフレームワークより少ないコードで簡単に開発できるよう設計されています。

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1クリップ

投稿2019/06/04 07:20

編集2022/01/12 10:55

OS: Ubuntu
OSバージョン: 18.04.2
rubyバージョン: 2.5.5
railsバージョン: Rails 5.2.3
mysqlバージョン: mysql Ver 14.14 Distrib 5.7.26, for Linux (x86_64) using EditLine wrapper

rails new app_name --database=mysqlまたは,rails new app_name -d mysqlでrailsの初期DBがmysqlのアプリを作ろうとしました.
sudo bundle installをし,なにも変更を加えずrails dbをしたところ,なぜかpsqlのエラーが出ました.

Traceback (most recent call last): 62: from bin/rails:3:in `<main>' 61: from bin/rails:3:in `load' 60: from /home/ubuntu/test/dede/bin/spring:15:in `<top (required)>' 59: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:70:in `require' 58: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:70:in `require' 57: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `<top (required)>' 56: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `load' 55: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/spring-2.0.2/bin/spring:49:in `<top (required)>' 54: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/spring-2.0.2/lib/spring/client.rb:30:in `run' 53: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/spring-2.0.2/lib/spring/client/command.rb:7:in `call' 52: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `call' 51: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `load' 50: from /home/ubuntu/test/dede/bin/rails:9:in `<top (required)>' 49: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in `require' 48: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:257:in `load_dependency' 47: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in `block in require' 46: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require' 45: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require_with_bootsnap_lfi' 44: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register' 43: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `block in require_with_bootsnap_lfi' 42: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require' 41: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands.rb:18:in `<top (required)>' 40: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/command.rb:46:in `invoke' 39: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/command/base.rb:65:in `perform' 38: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/thor-0.20.3/lib/thor.rb:387:in `dispatch' 37: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/thor-0.20.3/lib/thor/invocation.rb:126:in `invoke_command' 36: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/thor-0.20.3/lib/thor/command.rb:27:in `run' 35: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands/dbconsole/dbconsole_command.rb:166:in `perform' 34: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands/dbconsole/dbconsole_command.rb:8:in `start' 33: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands/dbconsole/dbconsole_command.rb:18:in `start' 32: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands/dbconsole/dbconsole_command.rb:97:in `config' 31: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/railties-5.2.3/lib/rails/commands/dbconsole/dbconsole_command.rb:116:in `configurations' 30: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in `require' 29: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:257:in `load_dependency' 28: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in `block in require' 27: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require' 26: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require_with_bootsnap_lfi' 25: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register' 24: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `block in require_with_bootsnap_lfi' 23: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require' 22: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activerecord-5.2.3/lib/active_record/base.rb:27:in `<top (required)>' 21: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activerecord-5.2.3/lib/active_record/base.rb:328:in `<module:ActiveRecord>' 20: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/lazy_load_hooks.rb:51:in `run_load_hooks' 19: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/lazy_load_hooks.rb:51:in `each' 18: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/lazy_load_hooks.rb:52:in `block in run_load_hooks' 17: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/lazy_load_hooks.rb:67:in `execute_hook' 16: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/lazy_load_hooks.rb:62:in `with_execution_control' 15: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/lazy_load_hooks.rb:71:in `block in execute_hook' 14: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/lazy_load_hooks.rb:71:in `instance_eval' 13: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activerecord-5.2.3/lib/active_record/railtie.rb:136:in `block (2 levels) in <class:Railtie>' 12: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activerecord-5.2.3/lib/active_record/connection_handling.rb:60:in `establish_connection' 11: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activerecord-5.2.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:956:in `establish_connection' 10: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activerecord-5.2.3/lib/active_record/connection_adapters/connection_specification.rb:191:in `spec' 9: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in `require' 8: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:257:in `load_dependency' 7: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in `block in require' 6: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require' 5: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require_with_bootsnap_lfi' 4: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register' 3: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `block in require_with_bootsnap_lfi' 2: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require' 1: from /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/activerecord-5.2.3/lib/active_record/connection_adapters/postgresql_adapter.rb:4:in `<top (required)>' /home/ubuntu/.rbenv/versions/2.5.5/lib/ruby/gems/2.5.0/gems/bundler-2.0.1/lib/bundler/rubygems_integration.rb:408:in `block (2 levels) in replace_gem': Error loading the 'postgresql' Active Record adapter. Missing a gem it depends on? pg is not part of the bundle. Add it to your Gemfile. (LoadError)

rails new app_nameとオプションをつけずにやっても同じエラーがでました.どうすれば直るでしょうか

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