Ruby on Railsで移行が機能しない

Question

Ruby on Railsアプリケーションが何らかの理由で移行を実行できないと伝えています。私はこれを解決する方法が不明です。偶然、情報のないテーブルを作った。私はその後、作成した移行ファイルとテーブルを削除しようとしました。私は移行コマンドを実行しようとすると、それは私に、このエラーを与える：

rails aborted! 
Don't know how to build task 'db:migration' (see --tasks) 
/usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/railties-5.0.0/lib/rails/commands/rake_proxy.rb:13:in `block in run_rake_task' 
/usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/railties-5.0.0/lib/rails/commands/rake_proxy.rb:10:in `run_rake_task' 
/usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/railties-5.0.0/lib/rails/commands/commands_tasks.rb:51:in `run_command!' 
/usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/railties-5.0.0/lib/rails/commands.rb:18:in `<top (required)>' 
/home/ubuntu/workspace/saasapp/bin/rails:9:in `require' 
/home/ubuntu/workspace/saasapp/bin/rails:9:in `<top (required)>' 
/usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/spring-1.7.2/lib/spring/client/rails.rb:28:in `load' 
/usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/spring-1.7.2/lib/spring/client/rails.rb:28:in `call' 
/usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/spring-1.7.2/lib/spring/client/command.rb:7:in `call' 
/usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/spring-1.7.2/lib/spring/client.rb:30:in `run' 
/usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/spring-1.7.2/bin/spring:49:in `<top (required)>' 
/usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/spring-1.7.2/lib/spring/binstub.rb:11:in `load' 
/usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/spring-1.7.2/lib/spring/binstub.rb:11:in `<top (required)>' 
/home/ubuntu/workspace/saasapp/bin/spring:15:in `require' 
/home/ubuntu/workspace/saasapp/bin/spring:15:in `<top (required)>' 
bin/rails:3:in `load' 
bin/rails:3:in `<main>' 
(See full trace by running task with --trace) 

誰かが私は、この問題を解決する助けてください。私は正しいテーブルを作成できるように、既存のテーブルを削除する必要があります。私のスキーマファイルは入力されません。

これは私がすくいデシベルを実行したときに私が取得エラーです：

rake db:migrate 

== 20170322214259 CreateProfiles移行：移行を=================== ================ - change_table（：profiles） レーキが中止されました！ はStandardError：エラーが発生している、これとキャンセルすべて以降の移行：

するSQLite3 :: SQLExceptionがデフォルト値のNULLとNOT NULL列を追加することはできません： は/ usr "のcreated_at" を追加日時、NOT NULL TABLE "プロファイル" ALTER /local/rvm/gems/ruby-2.3.0@saasapp/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:91:in initialize' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:91:in新しい ' /usr/local/rvm/gems/ruby-2.3 .0 @ saasapp/gems/sqlite3-1.3.13/lib/sqlite3/database.rb：91：prepare' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:137:in実行 ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0 .0/lib/active_record/connection_adapters/sqlite3_adapter.rb：232：in block in execute' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract_adapter.rb:566:inログのブロック ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activesupport-5.0.0/lib/active_support /通知イオン/ instrumenter.rb：21：in instrument' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract_adapter.rb:560:inログ ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/sqlite3_adapter.rb:232： in execute' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract/schema_statements.rb:547:in add_column ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/sqlite3_adapter.rb:373:in add_column' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract/schema_statements.rb:1096:in add_timestamps' /usr /ローカル/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract/schema_definitions.rb：525：in timestamps' /home/ubuntu/workspace/saasapp/db/migrate/20170322214259_create_profiles.rb:11:inブロックが変更中 ' /usr/local/rvm// usr/local/rvm/gems/ruby​​- 2.3.0@saasapp/gems/activerecord -5.0.0/lib/active_record/migration.rb：814：block in say_with_time' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:814:in say_with_time ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration .rb：834：in method_missing' /home/ubuntu/workspace/saasapp/db/migrate/20170322214259_create_profiles.rb:3:in変更 ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:788:in exec_migration' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:772:inブロック（2レベル）） ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:771:in block in migrate' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:398:in with_connection' /usr/local /rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:770:in migrate' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:950:in migrate ' /usr/local/rvm/gems/ruby-2.3.0 @ saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb：1211：block in execute_migration_in_transaction' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:1279:inブロックddl_transaction '/usr/local/bin/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract/database_statements.rb：232：transaction' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/transactions.rb:211:inトランザクション ' /usr/local/rvm/gems/ruby​​- 2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration。RB：1279：ddl_transaction' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:1210:in execute_migration_in_transactionの ' block in migrate_without_lock' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:1182:in /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:1183:in各' /usr/local/rvm/gems/ruby​​-2.3.2/usr/local/rvm/gems/ruby​​-local/rvm/gems/ruby​​- 2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb：1005：up' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:983:in移行 ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord- 5.0/lib/active_record/tasks/database_tasks.rb：161：のブロック（2レベル） ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/rake-12.0.0/exe/rake：27：in <top (required)>' /usr/local/rvm/gems/ruby-2.3.0@saasapp/bin/ruby_executable_hooks:15:in eval ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/bin/ruby_ executable_hooks：15：<main>' ActiveRecord::StatementInvalid: SQLite3::SQLException: Cannot add a NOT NULL column with default value NULL: ALTER TABLE "profiles" ADD "created_at" datetime NOT NULL /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:91:inで初期化 ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:91:in new' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:91:in' /usr/local/rvm/gems /ruby-2.3.0@saasapp/gems/sqlite3-1.3.13/lib/sqlite3/database.rb：137：execute' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/sqlite3_adapter.rb:232:inブロック実行中 ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract_adapter.rb：566：block in log' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activesupport-5.0.0/lib/active_support/notifications/instrumenter.rb:21:in楽器 ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/ gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract_adapter.rb：560：log' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/sqlite3_adapter.rb:232:inで実行 ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/ lib/active_record/connection_adapters/abstract/schema_statements.rb：547：in add_column' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/sqlite3_adapter.rb:373:in add_column ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract/schema_statements.rb:1096:in add_timestamps' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract/schema_definitions.rb:525:inタイムスタンプ ' /home/ubuntu/workspace/saasapp/db/migrate/20170322214259_create_profiles.rb：11：block in change' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract/schema_statements.rb:443:in change_table ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration。 rb：845：block in method_missing' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:814:in say_with_timeのブロック ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:814:in say_with_time' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:834:in method_missing' change' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:788:in exec_migration」 /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/ /home/ubuntu/workspace/saasapp/db/migrate/20170322214259_create_profiles.rb:3:in lib/active_record/migration.rb：772：in block (2 levels) in migrate' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:771:in移行中のブロック ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract/ connection_pool.rb：398：in with_connection' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:770:in移行 ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:950:in migrate' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:1211:inブロック内execute_migration_in_transaction ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:1279:in block in ddl_transaction' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract/database_statements.rb:232:inトランザクションのブロック' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract/transaction.rb：189：within_new_transaction' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract/database_statements.rb:232:inトランザクション ' /usr/local/rvm/gems/ruby​​- 2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_レコード/トランザクション.rb：211：in transaction' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:1279:in ddl_transaction ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:1210:in execute_migration_in_transaction' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:1183:in migrate_without_lockでブロック ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:1182:in each' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:1182:in migrate_without_lock' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb：1133：migrate' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:1005:in up ' /usr/local/rvm/gems/ruby-2.3.0@ saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb：983：migrate' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/tasks/database_tasks.rb:161:in移行 ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/ lib/active_record/railties/databasesにあります。rake：58：block (2 levels) in <top (required)>' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/rake-12.0.0/exe/rake:27:in ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/bin/ruby_executable_hooks:15:in eval' /usr/local/rvm/gems/ruby-2.3.0@saasapp/bin/ruby_executable_hooks:15:in SQLite3 :: SQLException：デフォルト値NULLのNOT NULL列を追加できません /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:91:in initialize' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:91:in新しい ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/sqlite3-1.3.13/lib/sqlite3/database.rb：91：prepare' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:137:in実行 ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/ activerecord-5.0.0/lib/active_record/connection_adapters/sqlite3_adapter.rb：232：block in execute' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract_adapter.rb:566:inブロック内ログ ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activesupport-5.0.0/ lib/active_support/notifications/instrumenter.rb：21：instrument' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract_adapter.rb:560:inログ '/usr/local/rvm/lib/active_record/connection_adapters/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/sqlite3_adapter.rb：373：add_column' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract/schema_statements.rb:1096:in add_timestamps ' /usr/local/rvm/gems/ruby-2.3.0@ saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract/schema_definitions.rb：525：ブロックが変更中 ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/ activerecord-5.0.0/lib/active_record/connection_adapters/abstract/schema_statements.rb：443：change_table' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:845:inのブロックmethod_missing ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0。 0/lib/active_record/migration.rb：814：block in say_with_time' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:814:in say_with_ti ' /usr/local/rvm/me/gems/ruby​​-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb：788：exec_migration' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:772:inブロック内でブロック（2レベル） ' /usr/local/rvm/gems/ruby​​- 2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb：771：block in migrate' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract/connection_pool.rb:398:in with_connection ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord- 5.0.0/lib/active_record/migration.rb：770：migrate' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:950:in移行 ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration。 rb：1211：in block in execute_migration_in_transaction' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:1279:in ddl_transactionのブロック ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/a ctive_record/connection_adapters/abstract/database_statements.rb：232：block in transaction' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract/transaction.rb:189:in within_new_transaction ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/connection_adapters/abstract/ database_statements.rb：232：transaction' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/transactions.rb:211:inトランザクション ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:1279:in ddl_transaction' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:1210:in execute_migration_in_transaction' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:1183:in block in migrate_without_lock' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:1182:in each ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb：1182：migrate_without_lock' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:1133:in移行 ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/ activerecord-5.0.0/lib/active_record/migration.r b：1005：in up' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/migration.rb:983:in移行 ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/tasks/database_tasks.rb:161:in migrate' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/activerecord-5.0.0/lib/active_record/railties/databases.rake:58:inブロック（ 2レベル） ' /usr/local/rvm/gems/ruby-2.3.0@saasapp/gems/rake-12.0.0/exe/rake:27:in <top (required)>' /usr/local/rvm/gems/ruby-2.3.0@saasapp/bin/ruby_executable_hooks:15:in eval' /usr/local/rvm/gems /ruby-2.3。saasapp/binに/ ruby​​_executable_hooks @ 0：15： `」 タスク：TOP => DB：移行 （--traceでタスクを実行することにより、完全なトレースを参照してください）

Answer 1

：

私はまた、あなたのモデル/移行を発生しながら、あなたがミスを犯しました見つけた場合、あなたは熊手db:rollbackに見てください。

Answer 2

私はあなたの代わりに移行 の移行を使用していたと考えていますあなたの代わりにrake db:migrationのrake db:migrateを使用示唆私のコメントに加えてrake db:migrate